Matsumoto Arimasa

Ph. D, The University of Tokyo

Life sciences, Bioorganic chemistry

Nanotechnology/Materials, Structural/physical organic chemistry

2016, 2017, 東京理科大学理学部応用化学科 嘱託講師

2016, 2017, Tokyo University of Science, Lecturer

2012, 2016, 東京理科大学理学部応用化学科 嘱託助教

2012, 2016, Tokyo University of Science, Assistant Professor

2009, 2012, 日本学術振興会 特別研究院（DC1）

2009, 2012, Japan Society for the Promotion of Science, Research Fellowship for Young Scientists

2012, The University of Tokyo, 理学系研究科, 化学専攻, Japan

2012, The University of Tokyo, Graduate School, Division of Science, Department of Chemistry

2009, The University of Tokyo, 理学系研究科, 化学専攻, Japan

2009, The University of Tokyo, Graduate School, Division of Science, Department of Chemistry

2007, The University of Tokyo, Faculty of Science, Department of Chemistry, Japan

2007, The University of Tokyo, Faculty of Science, Department of Chemistry

錯体化学会, Jul. 2018, 9999

日本化学会

有機合成化学協会

近畿化学協会 有機金属部会

The Japanese Photochemistry Association, Nov. 2021

日本化学会 有機結晶部会, Oct. 2021

Refereed, European Journal of Inorganic Chemistry, A Tetrakisquinoline Analog of Calcium Indicator Quin2 for Fluorescence Detection of Cd²⁺, Yuji Mikata; Minori Kaneda; Marin Tanaka; Satoshi Iwatsuki; Hideo Konno; Arimasa Matsumoto, © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Quin2 (2-{2-[bis(carboxymethyl)amino-5-methylphenoxy]methyl}-6-methoxy-8-[bis(carboxymethyl)amino]quinoline) is a well-known fluorescent Ca2+ indicator. In this study, we replaced its four carboxy groups with quinolines and deleted a methyl group on the benzene ring to afford TQquin2 [N,N,N',N'-tetrakis(2-quinolylmethyl)-8-amino-2-(2-aminophenoxy)methyl-6-methoxyquinoline]. In methanol solution, TQquin2 exhibited fluorescence enhancement toward Cd2+ with excellent selectivity., 08 Mar. 2020, 2020, 9, 757, 763, Scientific journal, 10.1002/ejic.201901323

Refereed, Inorganic Chemistry, Switching of Fluorescent Zn/Cd Selectivity in N, N, N′, N′-Tetrakis(6-methoxy-2-quinolylmethyl)-1,2-diphenylethylenediamine by One Asymmetric Carbon Atom Inversion, Yuji Mikata; Kana Nozaki; Marin Tanaka; Hideo Konno; Arimasa Matsumoto; Masaya Kawamura; Shin Ichiro Sato, © 2020 American Chemical Society. A quinoline-based hexadentate ligand, (S,S)-N,N,N′,N′-tetrakis(6-methoxy-2-quinolylmethyl)-1,2-diphenylethylenediamine ((S,S)-6-MeOTQPh2EN), exhibits fluorescence enhancement at 498 nm upon addition of 1 equiv of Zn2+ (IZn/I0 = 12, φZn = 0.047) in aqueous DMF solution (DMF/H2O = 2:1). Addition of 1 equiv of Cd2+ affords a much smaller fluorescence increase at the same wavelength (ICd/I0 = 2.5, ICd/IZn = 21%). The trivalent metal ions such as Al3+, Cr3+, and Fe3+ also exhibit fluorescence enhancement at 395 nm (IAl/I0 = 22, ICr/I0 = 6 and IFe3+/I0 = 13). In contrast, meso-6-MeOTQPh2EN exhibits a Cd2+-selective fluorescence increase at 405 nm in the presence of 1 equiv of metal ion (ICd/I0 = 11.5, φCd = 0.022), while Zn2+ induces a smaller fluorescent response under the same experimental conditions (IZn/I0 = 3.3, IZn/ICd = 29%). In this case, the fluorescence intensities of meso-6-MeOTQPh2EN in the presence of a large amount of Zn2+ and Cd2+ become similar. This diastereomer-dependent, fluorescent metal ion specificity is derived from the Zn2+-specific intramolecular excimer formation in (S,S)-6-MeOTQPh2EN-Zn2+ complex and higher binding affinity of meso-6-MeOTQPh2EN with Cd2+ in comparison to Zn2+. The more conformationally restricted diastereomeric pair, namely, cis- and trans-TQDACHs (cis- and trans-N,N,N′,N′-tetrakis(2-quinolylmethyl)-1,2-diaminocyclohexanes), both exhibit Zn2+-specific fluorescence enhancement because of the high metal binding affinity and intramolecular excimer forming property derived from the rigid DACH backbone., 12 Feb. 2020, Scientific journal, 10.1021/acs.inorgchem.9b03304

Refereed, SYMMETRY-BASEL, Role of asymmetric autocatalysis in the elucidation of origins of homochirality of organic compounds, Kenso Soai; Tsuneomi Kawasaki; Arimasa Matsumoto, May 2019, 11, 5, 694, 694, 10.3390/sym11050694

Refereed, Chem. Commun., Formation of enantioenriched alkanol with stochastic distribution of enantiomers in the absolute asymmetric synthesis under heterogeneous solid_vapor phase conditions, Yoshiyasu Kaimori; Yui Hiyoshi; Tsuneomi Kawasaki; Arimasa Matsumoto; Kenso Soai, 04 Apr. 2019, 55, 5223, 5226, 10.1039/c9cc01875a

Refereed, Organic & Biomolecular Chemistry, Achiral amino acid glycine acts as an origin of homochirality in asymmetric autocatalysis, Arimasa Matsumoto; Hanae Ozaki; Sumeru Tsuchiya; Toru Asahi; Meir Lahav; Tsuneomi Kawasaki; Kenso Soai, 01 Apr. 2019, 17, 4200, 4203, 10.1039/C9OB00345B

Refereed, Dalton Transactions, Methoxy-substituted tetrakisquinoline analogs of EGTA and BAPTA for fluorescence detection of Cd ²⁺, Yuji Mikata; Minori Kaneda; Hideo Konno; Arimasa Matsumoto; Shin Ichiro Sato; Masaya Kawamura; Satoshi Iwatsuki, © The Royal Society of Chemistry. EGTA (ethylene glycol bis(2-aminoethyl ether)-N,N,N′,N′-tetraacetic acid) and BAPTA (1,2-bis(2-aminophenoxy)ethane-N,N,N′,N′-tetraacetic acid) are well-known Ca 2+ chelators that have four carboxylates, two nitrogen atoms and two ether oxygen atoms. In the present study, we prepared EGTQ (N,N,N′,N′-tetrakis(2-quinolylmethyl)-1,2-bis(2-aminoethoxy)ethane) and BAPTQ (N,N,N′,N′-tetrakis(2-quinolylmethyl)-1,2-bis(2-aminophenoxy)ethane) as quinoline alternatives of EGTA and BAPTA, respectively. In methanol-HEPES buffer solution (9 : 1, 50 mM HEPES, 0.1 M KCl, pH = 7.5), EGTQ exhibits fluorescence enhancement induced by Zn 2+ and Cd 2+ with poor selectivity, but BAPTQ did not exhibit a fluorescence response to either metal ion. Introduction of three methoxy substituents at the 5,6,7-positions of each quinoline moiety in BAPTQ specifically enhanced the fluorescence intensity of the Cd 2+ complex, establishing the Cd 2+ -specific probe TriMeOBAPTQ (N,N,N′,N′-tetrakis(5,6,7-trimethoxy-2-quinolylmethyl)-1,2-bis(2-aminophenoxy)ethane). In contrast, TriMeOEGTQ (N,N,N′,N′-tetrakis(5,6,7-trimethoxy-2-quinolylmethyl)-1,2-bis(2-aminoethoxy)ethane) maintains a poor Cd 2+ /Zn 2+ selectivity in its fluorescence response. Although the crystal structures of Cd 2+ /Zn 2+ complexes with EGTQ and BAPTQ derivatives reveal the formation of multiple components including mononuclear and dinuclear complexes, the dinuclear Cd 2+ and Zn 2+ complexes with a linearly extended structure are regarded as possible fluorescent species in the solution. The conformational restriction of BAPTQ due to the orthophenylene moieties in the molecular skeleton is responsible for the formation of the weakly fluorescent, OH-bridged dizinc complex, which is critical to the strict Cd 2+ -specificity in the fluorescence response of TriMeOBAPTQ., 2019, 48, 12, 3840, 3852, Scientific journal, 10.1039/c8dt04735a

Refereed, Inorganic Chemistry, Pyrophosphate-Induced Intramolecular Excimer Formation in Dinuclear Zinc(II) Complexes with Tetrakisquinoline Ligands, Yuji Mikata; Risa Ohnishi; Risa Nishijima; Arimasa Matsumoto; Hideo Konno, © 2018 American Chemical Society. Dinuclear Zn2+ complexes with HTQHPN (N,N,N′,N′-tetrakis(2-quinolylmethyl)-2-hydroxy-1,3-propanediamine) derivatives have been prepared, and their pyrophosphate (PPi, P2O74-) sensing properties were examined. The ligand library includes six HTQHPN derivatives with electron-donating/withdrawing substituents, an extended aromatic ring, and six-membered chelates upon zinc binding. Complexation of ligand with 2 equiv of Zn2+ promotes small to moderate fluorescence enhancement around 380 nm, but in the cases of HTQHPN, HT(6-FQ)HPN (N,N,N′,N′-tetrakis(6-fluoro-2-quinolylmethyl)-2-hydroxy-1,3-propanediamine), and HT(8Q)HPN (N,N,N′,N′-tetrakis(8-quinolylmethyl)-2-hydroxy-1,3-propanediamine), subsequent addition of PPi induced a significant fluorescence increase around 450 nm. This fluorescence enhancement in the long-wavelength region is attributed to the conformational change of the bis-(quinolylmethyl)amine moiety which promotes intramolecular excimer formation between adjacent quinolines upon binding with PPi. The structures of PPi- and phosphate-bound dizinc complexes were revealed by X-ray crystallography utilizing phenyl-substituted analogues. The zinc complex with HT(8Q)HPN exhibits the highest signal enhancement (IPPi/I0 = 12.5) and selectivity toward PPi sensing (IATP/IPPi = 20% and IADP/IPPi = 25%). The fluorescence enhancement turned to decrease gradually after the addition of more than 1 equiv of PPi due to the removal of zinc ion from the ligand-zinc-PPi ternary complex, allowing the accurate determination of PPi concentrations at the fluorescence maximum composition. The practical application of the present method was demonstrated monitoring the enzymatic activity of pyrophosphatase., 02 Jul. 2018, 57, 13, 7724, 7734, Scientific journal, 10.1021/acs.inorgchem.8b00726

Refereed, European Journal of Inorganic Chemistry, Carbohydrate-Appended TQNPEN [N,N,N′,N′-Tetrakis(2-quinolylmethyl)-3-aza-1,5-pentanediamine] Derivatives for Fluorescence Detection of Intracellular Cd²⁺, Yuji Mikata; Kana Nozaki; Minori Kaneda; Keiko Yasuda; Masato Aoyama; Satoshi Tamotsu; Arimasa Matsumoto, © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Carbohydrate-appended TQNPEN [N,N,N′,N′-tetrakis(2-quinolylmethyl)-3-aza-1,5-pentanediamine] derivatives were developed as intracellular fluorescent Cd2+ sensors. Glucose (L1), galactose (L2), and maltose (L3) were utilized as sugar moieties. All glycosylated derivatives exhibit a fluorescence increase (ICd/I0 = 11–25) at 415 nm upon addition of 1 equiv. of Cd2+; however, 1 equiv. of Zn2+ induces negligible fluorescence change due to weak metal–ligand interaction (IZn/I0 = 3, IZn/ICd = 11–31 %). The properties of the Cd2+ complex with parent TQNPEN, including maximum fluorescence wavelength and lifetime, Cd2+ specificity of the fluorescence, and strong metal binding affinity, were well preserved in L1–L3. The intracellular Cd2+ detection was successfully achieved by glucose- and galactose-appended derivatives L1 and L2, likely due to enhanced cell membrane permeability and intracellular distribution in HeLa cells., 29 Jun. 2018, 2018, 24, 2755, 2761, Scientific journal, 10.1002/ejic.201800086

Refereed, Tetrahedron, Elsevier Ltd, Asymmetric autocatalysis of pyrimidyl alkanol and related compounds. Self-replication, amplification of chirality and implication for the origin of biological enantioenriched chirality, Kenso Soai; Tsuneomi Kawasaki; Arimasa Matsumoto, We discovered asymmetric autocatalysis in the enantioselective addition of diisopropylzinc to pyrimidine-5-carbaldehyde, where the product 5-pyrimidyl alkanol acts as a highly efficient asymmetric autocatalyst to afford more of itself (Soai reaction). Asymmetric autocatalysis proceeded quantitatively (> 99% yield), affording itself as a near enantiomerically pure (> 99.5% ee) product. An extremely low enantiomeric excess (ca. 0.00005% ee) can automultiply during three rounds of consecutive asymmetric autocatalysis to > 99.5% ee by asymmetric amplification. Circularly polarized light, and inorganic and organic crystals, act as the origin of chirality to trigger asymmetric autocatalysis. Asymmetric autocatalysis has enormous power to recognize and amplify the chirality of hydrogen, carbon, oxygen, and nitrogen isotopomers. Moreover, absolute asymmetric synthesis, i.e., the formation of enantioenriched compounds without the intervention of any chiral factor, is realized by asymmetric autocatalysis. By using designed molecules based on 5-pyrimidyl alkanol, the intramolecular asymmetric control, self-replication, and improvement of chiral multifunctionalized large molecules has been developed by applying asymmetric autocatalysis., 19 Apr. 2018, 74, 16, 1973, 1990, 10.1016/j.tet.2018.02.040

Refereed, ORGANIC & BIOMOLECULAR CHEMISTRY, ROYAL SOC CHEMISTRY, Reversal of the sense of enantioselectivity between 1-and 2-aza[6]helicenes used as chiral inducers of asymmetric autocatalysis, Arimasa Matsumoto; Kento Yonemitsu; Hanae Ozaki; Jiri Misek; Ivo Stary; Irena G. Stara; Kenso Soai, Reversal of the sense of enantioselectivity was observed between 1-aza[6]helicene 2 and 2-aza[6]helicene 3 employed as chiral inducers of asymmetric autocatalysis of pyrimidyl alkanol. In the presence of (P)-(+)-1-aza[6]helicene 2, the reaction of pyrimidine-5-carbaldehyde 1 with diisopropylzinc afforded, in conjunction with asymmetric autocatalysis, (S)-pyrimidyl alkanol 4 with high ee. Surprisingly, the reaction in the presence of (P)-(+)-2-aza[6]helicene 3 gave the opposite enantiomer of (R)-alkanol 4 with high ee. In the same manner, (M)-(-)-2 and (M)-(-)-3 afforded (R)-and (S)-alkanol 4, respectively. The sense of enantioselectivity is controlled not only by the helicity of the azahelicene derivatives but also by the position of the nitrogen atom., Feb. 2017, 15, 6, 1321, 1324, Scientific journal, 10.1039/c6ob02745h

Refereed, STEREOCHEMISTRY AND GLOBAL CONNECTIVITY: THE LEGACY OF ERNEST L ELIEL, VOL 2, AMER CHEMICAL SOC, Asymmetric Autocatalysis and the Origin of Homochirality, Kenso Soai; Arimasa Matsumoto, Asymmetric autocatalysis is a reaction in which chiral product acts as chiral catalyst for its own production. Pyrimdin-5-yl-iso-propylcarbinol (pyrimidyl alkanol) was found to be a highly efficient asymmetric autocatalyst in the enantioselective addition of diisopropyl zinc to pyrimidine-5-carbaldehyde to produce more of itself (Soai reaction). The process is the automultiplicaion, i.e., catalytic self-replication, of a chiral compound. Pyrimidyl alkanol with extremely low enantiomeric excess (ee) automultiplies and is amplified during three consecutive asymmetric autocatalyses to reach >99.5% ee. By using asymmetric autocatalysis, the origin of homochirality has been examined. Circularly polarized light, inorganic chiral crystals such as quartz, enantiotopic surface of achiral inorganic chiral such as gypsum, chiral crystals of achiral organic compounds, chiral compounds of isotope (hydrogen, carbon, oxygen, nitrogen) substitution, acting as chiral initiators in asymmetric autocatalysis, can be correlated to the highly enantioenriched products. Spontaneous absolute asymmetric synthesis was achieved without the intervention of any chiral factor., 2017, 1258, 27, 47, International conference proceedings

Refereed, CHEMISTRY-A EUROPEAN JOURNAL, WILEY-V C H VERLAG GMBH, Point-to-Point Ultra-Remote Asymmetric Control with Flexible Linker, Tsuneomi Kawasaki; Yasuyuki Ishikawa; Yoshihiro Minato; Takashi Otsuka; Shigeru Yonekubo; Itaru Sato; Takanori Shibata; Arimasa Matsumoto; Kenso Soai, An ultra-remote intramolecular (point-to-point) asymmetric control through 38 bonds (1,39-asymmetric induction) has been achieved by using the principle of direct supramolecular orientation of catalytic and reactive moieties in asymmetric autocatalysis. We found the highly stereoselective diisopropylzinc addition reaction using designed molecules possessing pyrimidine sites at each terminal of a conformationally flexible simple methylene chain., Jan. 2017, 23, 2, 282, 285, Scientific journal, 10.1002/chem.201605076

Refereed, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, WILEY-V C H VERLAG GMBH, Achiral Inorganic Gypsum Acts as an Origin of Chirality through Its Enantiotopic Surface in Conjunction with Asymmetric Autocatalysis, Arimasa Matsumoto; Yoshiyasu Kaimori; Mizuki Uchida; Haruna Omori; Tsuneomi Kawasaki; Kenso Soai, Achiral inorganic gypsum (CaSO4 center dot 2H(2)O) triggers the asymmetric autocatalysis of pyrimidyl alkanol on its two-dimensional enantiotopic faces to give highly enantioenriched alkanol products with absolute configurations corresponding to the respective enantiotopic surfaces. This is the first example of highly enantioselective synthesis on the enantiotopic surface of an achiral mineral., Jan. 2017, 56, 2, 545, 548, Scientific journal, 10.1002/anie.201610099

Refereed, ORGANIC & BIOMOLECULAR CHEMISTRY, ROYAL SOC CHEMISTRY, Can the analyte-triggered asymmetric autocatalytic Soai reaction serve as a universal analytical tool for measuring enantiopurity and assigning absolute configuration?, Christopher J. Welch; Kerstin Zawatzky; Alexey A. Makarov; Satoshi Fujiwara; Arimasa Matsumoto; Kenso Soai, An investigation is reported on the use of the autocatalytic enantioselective Soai reaction, known to be influenced by the presence of a wide variety of chiral materials, as a generic tool for measuring the enantiopurity and absolute configuration of any substance. Good generality for the reaction across a small group of test analytes was observed, consistent with literature reports suggesting a diversity of compound types that can influence the stereochemical outcome of this reaction. Some trends in the absolute sense of stereochemical enrichment were noted, suggesting the possible utility of the approach for assigning absolute configuration to unknown compounds, by analogy to closely related species with known outcomes. Considerable variation was observed in the triggering strength of different enantiopure materials, an undesirable characteristic when dealing with mixtures containing minor impurities with strong triggering strength in the presence of major components with weak triggering strength. A strong tendency of the reaction toward an 'all or none' type of behavior makes the reaction most sensitive for detecting enantioenrichment close to zero. Consequently, the ability to discern modest from excellent enantioselectivity was relatively poor. While these properties limit the ability to obtain precise enantiopurity measurements in a simple single addition experiment, prospects may exist for more complex experimental setups that may potentially offer improved performance., Jan. 2017, 15, 1, 96, 101, Scientific journal, 10.1039/c6ob01939k

Refereed, ORGANIC & BIOMOLECULAR CHEMISTRY, ROYAL SOC CHEMISTRY, Unusual reversal of enantioselectivity in the asymmetric autocatalysis of pyrimidyl alkanol triggered by chiral aromatic alkanols and amines, Arimasa Matusmoto; Satoshi Fujiwara; Yui Hiyoshi; Kerstin Zawatzky; Alexey A. Makarov; Christopher J. Welch; Kenso Soai, Temperature dependent inversion of enantioselectivity in asymmetric catalysis is an interesting and somewhat unusual phenomenon. We have observed temperature dependent inversion of enantioselectivity in the asymmetric autocatalysis reaction when triggered by a wide scope of enantioenriched alcohols and amines. The addition reaction of diisopropylzinc to pyrimidine-5-carbaldehyde in the presence of enantiopure alcohols or amines affords the pyrimidyl alkanol product at 0 degrees C with high ee. However, lowering the reaction temperature to -44 degrees C affords the opposite enantioselectivity., Jan. 2017, 15, 3, 555, 558, Scientific journal, 10.1039/c6ob02415g

Refereed, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, WILEY-V C H VERLAG GMBH, Asymmetric Induction by a Nitrogen N-14/N-15 Isotopomer in Conjunction with Asymmetric Autocatalysis, Arimasa Matsumoto; Hanae Ozaki; Shunya Harada; Kyohei Tada; Tomohiro Ayugase; Hitomi Ozawa; Tsuneomi Kawasaki; Kenso Soai, Chirality arising from isotope substitution, especially with atoms heavier than the hydrogen isotopes, is usually not considered a source of chirality in a chemical reaction. An N-2,N-2,N-3,N-3-tetramethyl-2,3-butanediamine containing nitrogen (N-14/N-15) isotope chirality was synthesized and it was revealed that this isotopically chiral diamine compound acts as a chiral initiator for asymmetric autocatalysis., Dec. 2016, 55, 49, 15246, 15249, Scientific journal, 10.1002/anie.201608955

Refereed, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, CHEMICAL SOC JAPAN, Elucidation of the Structures of Asymmetric Autocatalyst Based on X-ray Crystallography, Arimasa Matsumoto; Satoshi Fujiwara; Takaaki Abe; Atsushi Hara; Takayuki Tobita; Taisuke Sasagawa; Tsuneomi Kawasaki; Kenso Soai, Much interest has been paid to the origin of homochirality, such as that of L-amino acids. The proposed origins of chirality have usually induced only low enantiomeric excess. Thus, asymmetric amplification by asymmetric autocatalysis has been invoked. Asymmetric autocatalysis of 5-pyrimidyl alkanol in the enantioselective addition of diisopropylzinc to pyrimidine-5-carbaldehyde is a unique example of amplification of chirality. Crystallization of possible intermediates, specifically zinc alkoxides of this 5-pyrimidyl alkanol, was investigated to obtain mechanistic insights into this reaction. Single-crystal X-ray crystallography of the formed zinc alkoxide crystals shows the existence of tetramer or higher oligomer structures in this asymmetric autocatalytic system., Oct. 2016, 89, 10, 1170, 1177, Scientific journal, 10.1246/bcsj.20160160

Refereed, TETRAHEDRON-ASYMMETRY, PERGAMON-ELSEVIER SCIENCE LTD, Determination of the absolute structure of the chiral crystal consisting of achiral dibutylhydroxytoluene and asymmetric autocatalysis triggered by this chiral crystal, Arimasa Matsumoto; Sora Takeda; Shunya Harada; Kenso Soai, Absolute structure is determined of chiral crystal composed of achiral dibutylhydroxytoluene (BHT, 2,6-di-tert-butyl-p-cresol) by single crystal X-ray diffraction and circular dichroism. Left-handed (M-) crystals exhibited a positive Cotton effect at a wavelength of approximately 288 nm observed using KBr disk [CD (+)288(Kbr)]. In contrast, right-handed (P-) crystals exhibited a negative Cotton effect at the same wavelength [CD(-)288(Kbr)]. Asymmetric autocatalysis is triggered by the chiral crystals of achiral BHT, i.e., M-(+)-BHT afforded (S)-pyrimidyl alkanol and P-(-)-BHT afforded (R)-pyrimidyl alkanol. 2016 The Author(s). Published by Elsevier Ltd., Oct. 2016, 27, 19, 943, 946, Scientific journal, 10.1016/j.tetasy.2016.07.013

Refereed, CHEMISTRY LETTERS, CHEMICAL SOC JAPAN, Absolute Structure Determination of Chiral Crystals Consisting of Achiral Benzophenone with Single-crystal X-ray Diffraction and Its Correlation with Solid-state Circular Dichroism, Arimasa Matsumoto; Sumeru Tsuchiya; Yuki Hagiwara; Kazuhiko Ishikawa; Hideko Koshima; Toru Asahi; Kenso Soai, Achiral benzophenone is one of the simplest organic aromatic ketones that crystallize in the chiral form. The absolute structure of chiral crystals consisting of achiral benzophenone was firstly determined with single-crystal X-ray diffraction analysis and the absolute structure was successfully correlated with the solid-state circular dichroism spectra., May 2016, 45, 5, 526, 528, Scientific journal, 10.1246/cl.160114

Refereed, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, WILEY-V C H VERLAG GMBH, Crystal Structure of the Isopropylzinc Alkoxide of Pyrimidyl Alkanol: Mechanistic Insights for Asymmetric Autocatalysis with Amplification of Enantiomeric Excess, Arimasa Matsumoto; Takaaki Abe; Atsushi Hara; Takayuki Tobita; Taisuke Sasagawa; Tsuneomi Kawasaki; Kenso Soai, Asymmetric amplification during self-replication is a key feature that is used to explain the origin of homochirality. Asymmetric autocatalysis of pyrimidyl alkanol in the asymmetric addition of diisopropylzinc to pyrimidine-5-carbaldehyde is a unique example of this phenomenon. Crystallization of zinc alkoxides of this 5-pyrimidyl alkanol and single-crystal X-ray diffraction analysis of the alkoxide crystals reveal the existence of tetramer or higher oligomer structures in this asymmetric autocatalytic system., Dec. 2015, 54, 50, 15218, 15221, Scientific journal, 10.1002/anie.201508036

Refereed, CHEMISTRY LETTERS, CHEMICAL SOC JAPAN, Asymmetric Autocatalysis Triggered by Chiral Crystal of Achiral Ethylenediamine Sulfate, Arimasa Matsumoto; Takahiro Ide; Yoshiyasu Kaimori; Satoshi Fujiwara; Kenso Soai, Achiral ethylenediamine forms chiral structures spontaneously when crystallized as the sulfate salt. By using these chiral crystals of ethylenediamine sulfate (ethylenediammonium sulfate), asymmetric autocatalysis of pyrimidyl alkanol affords a highly enantioenriched product with chirality that is determined by the chirality of the crystals., May 2015, 44, 5, 688, 690, Scientific journal, 10.1246/cl.150052

Refereed, NEW JOURNAL OF CHEMISTRY, ROYAL SOC CHEMISTRY, Asymmetric induction by retgersite, nickel sulfate hexahydrate, in conjunction with asymmetric autocatalysis, Arimasa Matsumoto; Hirokazu Ozawa; Ayako Inumaru; Kenso Soai, Retgersite, nickel sulfate hexahydrate, forms a chiral crystal with space group P4(1)2(1)2 or P4(3)2(1)2. A chiral crystal of nickel sulfate hexahydrate was found to act as a chiral initiator of asymmetric autocatalysis, affording highly enantiomerically enriched pyrimidyl alkanols with the corresponding absolute configurations., 2015, 39, 9, 6742, 6745, Scientific journal, 10.1039/c5nj01459j

Refereed, CHEMICAL COMMUNICATIONS, ROYAL SOC CHEMISTRY, Helical mesoporous silica as an inorganic heterogeneous chiral trigger for asymmetric autocatalysis with amplification of enantiomeric excess, Tsuneomi Kawasaki; Yuko Araki; Kunihiko Hatase; Kenta Suzuki; Arimasa Matsumoto; Toshiyuki Yokoi; Yoshihiro Kubota; Takashi Tatsumi; Kenso Soai, Mesoporous silica has been used as a heterogeneous support for catalysts; however, asymmetric induction by the helicity of inorganic mesoporous silica itself has not yet been achieved. P- and M-helical mesoporous silica was found to act as a chiral inorganic trigger for asymmetric autocatalysis to afford (S) and (R)-pyrimidyl alkanol with >99.5% ee, respectively., 2015, 51, 42, 8742, 8744, Scientific journal, 10.1039/c5cc01750e

Refereed, NEW JOURNAL OF CHEMISTRY, Asymmetric Induction by Retgersite, Nickel Sulfate Hexahydrate, in Conjunction with Asymmetric Autocatalysis, A. Matsumoto; H. Ozawa; A. Inumaru; K. Soai, 2015, 51, 42, 8742, 8744, 10.1039/C5CC01750E

Refereed, ACCOUNTS OF CHEMICAL RESEARCH, AMER CHEMICAL SOC, Asymmetric Autocatalysis of Pyrimidyl Alkanol and Its Application to the Study on the Origin of Homochirality, Kenso Soai; Tsuneomi Kawasaki; Arimasa Matsumoto, Conspectus Amplification of enantiomeric excess (ee) is a key feature for the chemical evolution of biological homochirality from the origin of chirality. We describe the amplification of ee in the asymmetric autocatalysis of 5-pyrimidyl alkanols in the reaction between diisopropylzinc (i-Pr2Zn) and pyrimidine-5-carbaldehydes. During the reaction, an extremely low ee (ca. 0.00005% ee) can be amplified to >99.5% ee, and therefore, the initial slightly major enantiomer is automultiplied by a factor of ca. 630000, while the initial slightly minor enantiomer is automultiplied by a factor of less than 1000. In addition, pyrimidyl alkanols with various substituents at the 2-position of the pyrimidine ring, 3-quinolyl alkanol, 5-carbamoyl-3-pyridyl alkanol, and large multifunctionalized pyrimidyl alkanols also act as highly efficient asymmetric autocatalysts in the addition of i-Pr2Zn to the corresponding aldehydes. The asymmetric autocatalysis of pyrimidyl alkanol can discriminate the chirality of various compounds. Chiral substances such as alcohols, amino acids, hydrocarbons, metal complexes, and heterogeneous chiral materials can act as chiral triggers for asymmetric autocatalysis to afford pyrimidyl alkanols with the corresponding absolute configuration of the initiator. This recognition ability of chiral compounds is extremely high, and chiral discrimination of a cryptochiral quaternary saturated hydrocarbon was established by applying asymmetric autocatalysis. By using the large amplification effect of the asymmetric autocatalysis, we can link various proposed origins of chirality with highly enantioenriched organic compounds in conjunction with asymmetric autocatalysis. Thus, a statistical fluctuation in ee of racemic compounds can be amplified to high ee by using asymmetric autocatalysis. Enantiomeric imbalance induced by irradiation of circularly polarized light can affect the enantioselectivity of asymmetric autocatalysis. The asymmetric autocatalysis was also triggered by the morphology of inorganic chiral crystals such as quartz, sodium chlorate, and cinnabar. Chiral organic crystals of achiral compounds also act as chiral initiators, and during the study of a crystal of cytosine, enantioselective chiral crystal phase transformation of the cytosine crystal was achieved by removal of the water of crystallization in an achiral monohydrate crystal. Enantioselective C-C bond formation was realized on the surfaces of achiral single crystals based on the oriented prochirality of achiral aldehydes. Furthermore, asymmetric autocatalysis of pyrimidyl alkanols is a highly sensitive reaction that can recognize and amplify the significantly small effect of a chiral compound arising solely from isotope substitution of hydrogen, carbon, and oxygen (D/H, (CC)-C-13-C-12, and O-18/O-16). These examples show that asymmetric autocatalysis with an amplification of chirality is a powerful tool for correlating the origin of chirality with highly enantioenriched organic compounds. Asymmetric autocatalysis using two b-amino alcohols reveals a reversal of enantioselectivity in the addition of i-Pr2Zn to aldehyde and is one approach toward understanding the mechanism of asymmetric dialkylzinc addition, where heteroaggregates act as the catalytic species., Dec. 2014, 47, 12, 3643, 3654, 10.1021/ar5003208

Refereed, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, WILEY-V C H VERLAG GMBH, Self-Replication and Amplification of Enantiomeric Excess of Chiral Multifunctionalized Large Molecules by Asymmetric Autocatalysis, Tsuneomi Kawasaki; Mai Nakaoda; Yutaro Takahashi; Yusuke Kanto; Nanako Kuruhara; Kenji Hosoi; Itaru Sato; Arimasa Matsumoto; Kenso Soai, Self-replication of large chiral molecular architectures is one of the great challenges and interests in synthetic, systems, and prebiotic chemistry. Described herein is a new chemical system in which large chiral multifunctionalized molecules possess asymmetric autocatalytic self-replicating and self-improving abilities, that is, improvement of their enantioenrichment in addition to the diastereomeric ratio. The large chiral multifunctionalized molecules catalyze the production of themselves with the same structure, including the chirality of newly formed asymmetric carbon atoms, in the reaction of the corresponding achiral aldehydes and reagent. The chirality of the large multifunctionalized molecules controlled the enantioselectivity of the reaction in a highly selective manner to construct multiple asymmetric stereogenic centers in a single reaction., Oct. 2014, 53, 42, 11199, 11202, Scientific journal, 10.1002/anie.201405441

Refereed, ORGANIC LETTERS, AMER CHEMICAL SOC, Asymmetric Autocatalysis Initiated by Finite Single-Wall Carbon Nanotube Molecules with Helical Chirality, Shunpei Hitosugi; Arimasa Matsumoto; Yoshiyasu Kaimori; Ryosuke Iizuka; Kenso Soai; Hiroyuki Isobe, An asymmetric autocatalysis reaction was initiated by a finite single-wall carbon nanotube molecule with helical chirality. The asymmetric induction was initiated by the chiral environment arising from the planar chirality of the tubular polyaromatic hydrocarbons., Feb. 2014, 16, 3, 645, 647, Scientific journal, 10.1021/ol403384q

Refereed, CHEMICAL RECORD, WILEY-V C H VERLAG GMBH, The Origins of Homochirality Examined by Using Asymmetric Autocatalysis, Kenso Soai; Tsuneomi Kawasaki; Arimasa Matsumoto, Pyrimidyl alkanol was found to act as an asymmetric autocatalyst in the enantioselective addition of diisopropylzinc to pyrimidine-5-carbaldehyde. Asymmetric autocatalysis of 2-alkynylpyrimidyl alkanol with an extremely low enantiomeric excess (ca. 0.00005% ee) exhibits enormous asymmetric amplification to afford the same compound with >99.5% ee. This asymmetric autocatalysis with amplification of ee has been employed to examine the validity of proposed theories of the origins of homochirality. Circularly polarized light, quartz, sodium chlorate, cinnabar, chiral organic crystals and spontaneous absolute asymmetric synthesis were considered as possible candidates for the origin of chirality; each could act as a chiral source in asymmetric autocatalysis. Asymmetric autocatalysis can discriminate the isotope chirality arising from the small difference between carbon (carbon-13/carbon-12) and hydrogen (D/H) isotopes. Cryptochiral compounds were also discriminated by asymmetric autocatalysis., Feb. 2014, 14, 1, 70, 83, Scientific journal, 10.1002/tcr.201300028

Refereed, Tetrahedron Asymmetry, Enantiodivergent formation of a chiral cytosine crystal by removal of crystal water from an achiral monohydrate crystal under reduced pressure, Hiroko Mineki; Yoshiyasu Kaimori; Tsuneomi Kawasaki; Arimasa Matsumoto; Kenso Soai, An achiral nucleobase cytosine forms an achiral monohydrate crystal (space group: P21/c) by crystallization from a water solution. It was found that the removal of crystal water under reduced pressure at room temperature afforded a chiral crystal of anhydrous cytosine (P212 121). The crystal chirality of anhydrous cytosine corresponds to the enantiotopic crystal face of the achiral monohydrate therefore, when the enantiotopic b1-face is exposed to the reduced pressure, dehydration occurred in the direction from the b1-face to provide [CD(+)310KBr]-cytosine crystal. In contrast, dehydration from the b2-face gave the opposite enantiomorphous [CD(-)310 KBr]-cytosine crystal. The correlation between enantiotopic faces and the formed crystal chirality is opposite to that from dehydration by heating. The formed chiral cytosine crystals act as a chiral trigger for asymmetric autocatalysis with enantioenrichment amplification of pyrimidylalkanol., 30 Nov. 2013, 24, 21-22, 1365, 1367, Scientific journal, 10.1016/j.tetasy.2013.09.020

Refereed, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, WILEY-V C H VERLAG GMBH, Asymmetric Autocatalysis Induced by Cinnabar: Observation of the Enantioselective Adsorption of a 5-Pyrimidyl Alkanol on the Crystal Surface, Hitoshi Shindo; Yusuke Shirota; Kaori Niki; Tsuneomi Kawasaki; Kenta Suzuki; Yuko Araki; Arimasa Matsumoto; Kenso Soai, Aug. 2013, 52, 35, 9135, 9138, Scientific journal, 10.1002/anie.201304284

Refereed, CHEMISTRY LETTERS, CHEMICAL SOC JAPAN, Enantioselective Synthesis Induced by the Helical Molecular Arrangement in the Chiral Crystal of Achiral Tris(2-hydroxyethyl) 1,3,5-Benzenetricarboxylate in Conjunction with Asymmetric Autocatalysis, Tsuneomi Kawasaki; Mizuki Uchida; Yoshiyasu Kaimori; Taisuke Sasagawa; Arimasa Matsumoto; Kenso Soai, 5-Pyrimidyl alkanol with an enantiomeric excess of up to >99.5% was formed using chiral crystals of achiral tris(2-hydroxyethyl) 1,3,5-benzenetricarboxylate as a chiral initiator. In the enantioselective addition of diisopropylzinc to pyrimidine-5-carbaldehyde, the helicity of the molecular arrangement of achiral tricarboxylate in the crystalline state could be successfully used as a source of chirality to afford enantioen-riched alkanol in conjunction with asymmetric autocatalysis with amplification of enantiomeric excess., Jul. 2013, 42, 7, 711, 713, Scientific journal, 10.1246/cl.130185

Refereed, Organic and Biomolecular Chemistry, Asymmetric autocatalysis triggered by oxygen isotopically chiral glycerin, Arimasa Matsumoto; Shotaro Oji; Shizuka Takano; Kyohei Tada; Tsuneomi Kawasaki; Kenso Soai, Chiral (S)- and (R)-18O-glycerin induces enantioselective addition of diisopropylzinc to pyrimidine-5-carbaldehyde, and the subsequent asymmetric autocatalysis affords (R)- and (S)-pyrimidyl alkanol with high enantiomeric excess, respectively. © The Royal Society of Chemistry 2013., 14 May 2013, 11, 18, 2928, 2931, Scientific journal, 10.1039/c3ob40293b

Refereed, Journal of the American Chemical Society, β-Arylation of carboxamides via iron-catalyzed C(sp3)-H bond activation, Rui Shang; Laurean Ilies; Arimasa Matsumoto; Eiichi Nakamura, A 2,2-disubstituted propionamide bearing an 8-aminoquinolinyl group as the amide moiety can be arylated at the β-methyl position with an organozinc reagent in the presence of an organic oxidant, a catalytic amount of an iron salt, and a biphosphine ligand at 50 C. Various features of selectivity and reactivity suggest the formation of an organometallic intermediate via rate-determining C-H bond cleavage rather than a free-radical-type reaction pathway. © 2013 American Chemical Society., 24 Apr. 2013, 135, 16, 6030, 6032, Scientific journal, 10.1021/ja402806f

Refereed, SYNLETT, GEORG THIEME VERLAG KG, Synthesis of Polysubstituted Naphthalenes by Iron-Catalyzed [2+2+2] Annulation of Grignard Reagents with Alkynes, Laurean Ilies; Arimasa Matsumoto; Motoaki Kobayashi; Naohiko Yoshikai; Eiichi Nakamura, Iron catalyzes the oxidative [2+2+2] annulation of an arylmagnesium compound with two molecules of an internal alkyne via C-H bond activation at 0 degrees C to produce polysubstituted naphthalene., Oct. 2012, 23, 16, 2381, 2384, Scientific journal, 10.1055/s-0032-1317077

Refereed, ADVANCED SYNTHESIS & CATALYSIS, WILEY-V C H VERLAG GMBH, Iron-Catalyzed Nitrogen-Directed Coupling of Arene and Aryl Bromides Mediated by Metallic Magnesium, Laurean Ilies; Motoaki Kobayashi; Arimasa Matsumoto; Naohiko Yoshikai; Eiichi Nakamura, 2-Arylpyridines, 2-alkenylpyridine, and aromatic imines can be coupled with aryl bromides in the presence of an iron catalyst, metallic magnesium, a diamine ligand and an organic dihalide oxidant at 0 degrees C. The use of a 1:1 mixture of tetrahydrofuran and 1,4-dioxane is essential for this C-H bond activation reaction. The reaction has wider scope of the substrate compared with the reaction using a separately prepared Grignard reagent, and proceeds with lower catalyst loading (2.5 mol%)., Mar. 2012, 354, 4, 593, 596, Scientific journal, 10.1002/adsc.201100791

Refereed, CHEMICAL COMMUNICATIONS, ROYAL SOC CHEMISTRY, Asymmetric autocatalysis initiated by achiral nucleic acid base adenine: implications on the origin of homochirality of biomolecules, Hiroko Mineki; Taichi Hanasaki; Arimasa Matsumoto; Tsuneomi Kawasaki; Kenso Soai, Enantiomorphous crystals of adeninium dinitrate acted as the source of chirality in asymmetric autocatalysis producing highly enantioenriched (S)- and (R)-5-pyrimidyl alkanols, with the absolute configurations corresponding to that of crystals., 2012, 48, 85, 10538, 10540, Scientific journal, 10.1039/c2cc34928k

Refereed, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, AMER CHEMICAL SOC, Phenanthrene Synthesis by Iron-Catalyzed [4+2] Benzannulation between Alkyne and Biaryl or 2-Alkenylphenyl Grignard Reagent, Arimasa Matsumoto; Laurean Ilies; Eiichi Nakamura, The [4 + 2] benzannulation reaction of internal or terminal alkynes with 2-biaryl, 2-heteroarylphenyl, or 2-alkenylphenyl Grignard reagents in the presence of Fe(acac)3, 4,4'-di-tert-butyl-2,2'-bipyridyl, and 1 ,2-dichloro-2-methylpropane takes place at room temperature in I h to give 9-substituted or 9,10-disubstituted phenanthrenes and congeners in moderate to excellent yields. The reaction tolerates sensitive functional groups such as bromide and olefin. When applied to a 1,3-diyne, the annulation reaction takes place on both acetylenic moieties to give a bisphenanthrene derivative., May 2011, 133, 17, 6557, 6559, Scientific journal, 10.1021/ja201931e

Refereed, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, AMER CHEMICAL SOC, Iron-Catalyzed C-C Bond Formation at alpha-Position of Aliphatic Amines via C-H Bond Activation through 1,5-Hydrogen Transfer, Naohiko Yoshikai; Adam Mieczkowski; Arimasa Matsumoto; Laurean Ilies; Eiichi Nakamura, C-C bond formation reactions that take place through organoiron species sometimes exhibit radical-like character. The reaction of N-(2-iodophenylmethyl)dialkylamine with a Grignard or diorganozinc reagent in the presence of a catalytic amount of Fe(acac)3 gives the product resulting from arylation, alkenylation, or alkylation of the sp(3) C-H bond next to the amine group in good to excellent yield. Mechanistic studies including labeling experiments indicate that the reaction involves radical translocation triggered by the formation of a radical-like species by removal of the iodide group., Apr. 2010, 132, 16, 5568, +, Scientific journal, 10.1021/ja100651t

Refereed, SYNLETT, GEORG THIEME VERLAG KG, Iron-Catalyzed Direct Arylation of Aryl Pyridines and Imines Using Oxygen as an Oxidant, Naohiko Yoshikai; Arimasa Matsumoto; Jakob Norinder; Eiichi Nakamura, An iron-catalyzed ortho C-H bond arylation reaction of an aryl pyridine or imine with an arylzinc reagent, which previously required the use of a rather expensive organodichloride as an oxidant, can now be achieved under oxygen atmosphere. By slowly introducing oxygen into the reaction, oxidative cross-coupling of the two reactants took place smoothly to give a biaryl product in moderate to good yield., Jan. 2010, 2, 313, 316, Scientific journal, 10.1055/s-0029-1219184

Refereed, ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, WILEY-V C H VERLAG GMBH, Iron-Catalyzed Chemoselective ortho Arylation of Aryl Imines by Directed C-H Bond Activation, Naohiko Yoshikai; Arimasa Matsumoto; Jakob Norinder; Eiichi Nakamura, 2009, 48, 16, 2925, 2928, Scientific journal, 10.1002/anie.200900454

Refereed, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, AMER CHEMICAL SOC, Iron-catalyzed direct arylation through directed C-H bond activation, Jakob Norinder; Arimasa Matsumoto; Naohiko Yoshikai; Eiichi Nakamura, An iron-catalyzed C-C bond formation reaction of a nitrogencontaining aromatic compound with an arylzinc reagent takes place at 0 degrees C in a good to quantitative yield. The reaction involves a C-H bond activation directed by a neighboring nitrogen atom. The important additives in this reaction are 1,10-phenanthroline, tetramethylethylenediamine, and 1,2-dichloro2-methylpropane, in the absence of which a very low product yield was observed., May 2008, 130, 18, 5858, +, Scientific journal, 10.1021/ja800818b

Chemical Communications, Royal Society of Chemistry (RSC), Chiral approach to investigate mechanism of highly efficient thermally activated delayed fluorescence, Kikuya Hayashi; Arimasa Matsumoto; Shuzo Hirata,

Cancellation of the Cotton effect depending on vibrations of a chiral orthogonal donor–acceptor structure identifies a mechanism of highly efficient delayed fluorescence.

, 2021, 57, 14, 1738, 1741, Scientific journal, 10.1039/d0cc08064k

Dalton Transactions, Royal Society of Chemistry (RSC), Structure and electrochemical properties of (µ-O)2Mn2(III,III) and (µ-O)2Mn2(III,IV) complexes supported by pyridine-, quinoline-, isoquinoline- and quinoxaline-based tetranitrogen ligands, Yuji Mikata; Yasuko Kuroda; Kyoko Naito; Kana Murakami; Chihiro Yamamoto; Shoko Yabe; Shizuka Yonemura; Arimasa Matsumoto; Hajime Katano,

Seven new bis(µ-oxo) dimanganese complexes with Mn2(III,III) or Mn2(III,IV) oxidation states were prepared using quinoline- and isoquinoline-based tetraamine ligands. The structures of the ligands include ethylenediamine, trans-1,2-cyclohexanediamine and tripodal amine,...

, 2021, 50, 12, 4133, 4144, Scientific journal, True, 10.1039/d1dt00184a

Inorganica Chimica Acta, Elsevier BV, Conversion of (µ-OH)2Mn2(II,II) complex to (µ-O)2Mn2(III,III) core supported by a quinoxaline-based tetranitrogen ligand, Yuji Mikata; Kana Murakami; Ayaka Ochi; Fumie Nakagaki; Kyoko Naito; Arimasa Matsumoto; Ryoji Mitsuhashi; Masahiro Mikuriya, © 2020 Elsevier B.V. Quinoxaline-based tetranitrogen ligand, N,N’-bis(2-quinoxalylmethyl)-N,N’-dimethylethylenediamine (L9), stabilizes the bis(µ-hydroxo) dinuclear manganese(II,II) core. Oxidation of the complex with hydrogen peroxide in methanol suspension affords the bis(µ-oxo) dinuclear manganese(III,III) complex. The quinoxaline-based tripod ligand, tris(2-quinoxalylmethyl)amine (L11), did not afford corresponding bis(hydroxo) dimanganese(II,II) complex due to the subsequent atmospheric oxygen-promoted oxidation in the reaction solution similar to its quinoline counterpart, tris(2-quinolylmethyl)amine (L10). The solid state structures of [Mn(II)Cl2(L9)], [(µ-OH)2Mn2(II,II)(L9)2]2+, [(µ-O)2Mn2(III,III)(L9)2]2+, [(µ-O)2Mn2(III,III)(L11)2]2+, and [(µ-O)2Mn2(III,III)(L10)2]2+ complexes were determined by X-ray crystallography. The magnetic susceptibility measurement of (µ-OH)2Mn2(II,II) complex and electrochemical oxidation of (µ-O)2Mn2(III,III) complexes were performed to evaluate the tetramine ligand effect stabilizing the low oxidation states of dinuclear metal center supported by two oxygen atom bridges., Sep. 2020, 509, 119688, 119688, Scientific journal, 10.1016/j.ica.2020.119688

Refereed, Chemical Communications, Royal Society of Chemistry (RSC), Asymmetric autocatalysis triggered by triglycine sulfate with switchable chirality by altering the direction of the applied electric field, Tsuneomi Kawasaki; Yoshiyasu Kaimori; Seiya Shimada; Natsuki Hara; Susumu Sato; Kenta Suzuki; Toru Asahi; Arimasa Matsumoto; Kenso Soai,

In asymmetric autocatalysis with amplification of ee, molecular chirality of highly enantioenriched organic compounds is controlled by a crystal TGS, whose chirality is switchable by changing the direction of the applied static electric field.

, 2021, 57, 49, 5999, 6002, Scientific journal, 10.1039/d1cc02162a

European Journal of Inorganic Chemistry, N,N,N′,N′-Tetrakis(3-isoquinolylmethyl)-2,6-lutidylenediamine (3-isoTQLN): A Fluorescent Zn²⁺/Cd²⁺ Dual Sensor as a Hybrid of 2-Quinolyl/1-Isoquionolyl Counterparts TQLN/1-isoTQLN, Yuji Mikata; Ayaka Takekoshi; Minori Kaneda; Shizuka Yonemura; Yuri Aono; Arimasa Matsumoto; Hideo Konno; Shawn C. Burdette, Fluorescence detection of Zn and Cd is of continuing interest due to their significant importance in biological and environmental sciences. Strict discrimination of Zn and Cd by fluorescent probe molecules has still been a challenging task because of the small difference in ionic radii of these group 12 metal ions. In this study, three heptadentate fluorescent probes with a common 2,6-lutidylenediamine core and four quinoline/isoquinoline sidearms are presented. The N,N,N′,N′-tetrakis(2-quinolylmethyl)-2,6-lutidylenediamine (TQLN) exhibits Zn -specific fluorescence enhancement via an excimer formation, while the N,N,N′,N′-tetrakis(1-isoquinolylmethyl)-2,6-lutidylenediamine (1-isoTQLN) responds specifically to Cd at the short wavelength region by monomer emission. The N,N,N′,N′-tetrakis(3-isoquinolylmethyl)-2,6-lutidylenediamine (3-isoTQLN) responds to both Zn and Cd at different emission wavelengths, acting as a dual sensor with hybrid properties of TQLN and 1-isoTQLN. Methoxy-substituted derivatives of 1- and 3-isoTQLN were also examined. 2+ 2+ 2+ 2+ 2+ 2+ 2+ 2+, 2021, 2021, 13, 1287, 1296, Scientific journal, 10.1002/ejic.202001171

Refereed, Chemical Communications, Royal Society of Chemistry (RSC), Circular dichroism spectroscopy of catalyst preequilibrium in asymmetric autocatalysis of pyrimidyl alkanol, Arimasa Matsumoto; Ayame Tanaka; Yoshiyasu Kaimori; Natsuki Hara; Yuji Mikata; Kenso Soai, Circular dichroism spectroscopic analysis of the asymmetric autocatalytic reaction of pyrimidyl alkanol reveals the dimeric and tetrameric equilibria of the alkoxide catalyst in the solution state., 2021, 57, 85, 11209, 11212, Scientific journal, 10.1039/d1cc04206h

Refereed, Chemistry – A European Journal, Wiley, Chiral Dinuclear Eu III , Tb III , and Y III Complexes Supported by P ‐Stereogenic Linear Tetraphosphine Tetraoxide, Tomoaki Tanase; Kanako Nakamae; Yume Okawa; Mami Hamada; Arimasa Matsumoto; Takayuki Nakajima; Takuya Nakashima; Tsuyoshi Kawai, 07 Feb. 2022, 28, 8, Scientific journal, 10.1002/chem.202104060

Inorganic chemistry, A Synthetic Model for the Possible FeIV2(μ-O)2 Core of Methane Monooxygenase Intermediate Q Derived from a Structurally Characterized FeIIIFeIV(μ-O)2 Complex., Yuji Mikata; Yuri Aono; Chihiro Yamamoto; Hiromi Nakayama; Arimasa Matsumoto; Fukue Kotegawa; Masafumi Harada; Hajime Katano; Yoshio Kobayashi; Sachiko Yanagisawa; Minoru Kubo; Atsushi Kajiwara; Masahito Kodera, A bis(μ-oxo)diiron(IV,IV) complex as a model for intermediate Q in the methane monooxygenase reaction cycle has been prepared. The precursor complex with a [FeIIIFeIV(μ-O)2] core was fully characterized by X-ray crystallography and other spectroscopic analyses and was converted to the [FeIV2(μ-O)2] complex via electrochemical oxidation at 1000 mV (vs Ag/Ag+) in acetone at 193 K. The UV-vis spectral features, Mössbauer parameters (ΔEQ = 2.079 mm/s and δ = -0.027 mm/s), and EXAFS analysis (Fe-O/N = 1.73/1.96 Å and Fe···Fe = 2.76 Å) support the structure of the low-spin (S = 1, for each Fe) [FeIV2(μ-O)2] core. The rate constants of the hydrogen abstraction reaction from 9,10-dihydroanthracene at 243 K suggest the high reactivity of these synthetic bis(μ-oxo)diiron complexes supported by simple N4 tripodal ligand., 25 Nov. 2021, 61, 2, 786, 790, Scientific journal, True, 10.1021/acs.inorgchem.1c02699

American Chemical Society (ACS), Stereoselective Hydroxyallylation of Cyclopropenes with Cyclopropanols via NHC Catalysis of Transient Organozinc Species, Kento Tsukiji; Arimasa Matsumoto; Kazuya Kanemoto; Naohiko Yoshikai, A stereoselective hydroxyallylation reaction of cyclopropenes with cyclopropanols is achieved under zinc-mediated conditions, affording densely functionalized cyclopropanes with excellent diastereocontrol over three contiguous stereocenters within and outside the cyclopropane ring. A racemic variant of the reaction is synergistically promoted by catalytic N-heterocyclic carbene (NHC) and organic base (DBU), whereas chiral amino alcohol-derived bifunctional NHC enables a catalytic enantioselective variant. Mechanistically, the reaction features transient generation of enolized zinc homoenolate via ring-opening of zinc cyclopropoxide and enolization of the resulting homoenolate, followed by its addition to the cyclopropene as a prochiral allylzinc nucleophile., 27 Dec. 2023, 10.26434/chemrxiv-2023-hch07-v2

Tetrahedron, Elsevier BV, Asymmetric autocatalysis with amplification of enantiomeric excess utilizing chiral crystals of achiral o-terphenyls as chiral triggers, Tsuneomi Kawasaki; Daisuke Tateishi; Arimasa Matsumoto; Kenso Soai, Feb. 2024, 152, 133835, 133835, Scientific journal, 10.1016/j.tet.2024.133835

Advances in Asymmetric Autocatalysis and Related Topics, Elsevier, Structural Study of Asymmetric Autocatalysis by X-Ray Crystallography, Arimasa Matsumoto; Tsuneomi Kawasaki; Kenso Soai, Asymmetric amplification during self-replication is a key feature that is used to explain the origin of homochirality. Asymmetric autocatalysis of 5-pyrimidyl alkanol in the asymmetric addition of diisopropylzinc to pyrimidine-5-carbaldehyde is a unique example of this phenomenon. To obtain mechanistic insight into this reaction, the crystallization of possible intermediates, specifically zinc alkoxides of this 5-pyrimidyl alkanol, was investigated. Single-crystal X-ray diffraction analysis of the obtained alkoxide crystals reveals the existence of tetramer or higher oligomer structures in this asymmetric autocatalytic system., 23 May 2017, 183, 202, In book, 10.1016/B978-0-12-812824-4.00010-1

Advances in Asymmetric Autocatalysis and Related Topics, Elsevier, Asymmetric Autocatalysis Initiated by Crystal Chirality of Achiral Compounds, Arimasa Matsumoto; Yoshiyasu Kaimori; Tsuneomi Kawasaki; Kenso Soai, Chiral crystallization of achiral compounds is attracting much attention, especially in areas of chirality research such as chiral separation and generation. Spontaneous chiral crystallization generates chirality and is a possible origin of homochirality. Although various organic and inorganic achiral compounds form chiral crystals, there are few examples of the use of this chirality for the control of enantioselective reactions of organic compounds. In this chapter, we describe how asymmetric autocatalysis can successfully utilize crystal chirality of achiral organic compounds to afford highly enantioenriched products with the absolute structure corresponding to the chirality of the crystals used., 23 May 2017, 337, 355, In book, 10.1016/B978-0-12-812824-4.00018-6

Advances in Asymmetric Autocatalysis and Related Topics, Elsevier, Synthesis of Pyrimidine-Terminated Chiral Large Molecular Architectures with Functions of Self-Replication and Self-Improvement by Asymmetric Autocatalysis, Tsuneomi Kawasaki; Arimasa Matsumoto; Itaru Sato; Kenso Soai, The synthesis of huge chiral molecular architectures with functions of self-replication and self-improvement is one of the great topics of research in synthetic, systems and prebiotic chemistry. Here we describe a new chemical system in which large chiral multifunctionalized molecules achieve asymmetric autocatalytic multiplication and amplification of their enantiomeric and diastereomeric purities. The large chiral multifunctionalized molecules, that is, hexakis(5-pyrimidyl alkanol)hexaalkylsilane, replicatively catalyze the production of themselves with the same structure, including information on the chirality at newly formed asymmetric carbon atoms, in the reaction of corresponding achiral aldehydes and reagents. The chirality of the large molecules efficiently controlled the enantioselectivity of the reaction to construct multiasymmetric stereogenic centers in a single reaction step., 23 May 2017, 149, 165, In book, 10.1016/B978-0-12-812824-4.00008-3

Advances in Asymmetric Autocatalysis and Related Topics, Elsevier, Asymmetric Autocatalysis and the Origins of Homochirality of Organic Compounds. An Overview, Kenso Soai; Arimasa Matsumoto; Tsuneomi Kawasaki, Asymmetric autocatalysis is a reaction in which a chiral product acts as a chiral catalyst for its own production. 5-Pyrimidyl alkanol acts as an asymmetric autocatalyst with amplification of chirality in the enantioselective addition of diisopropylzinc to pyrimidine-5-carbaldehyde. 2-Alkynyl-5-pyrimidyl alkanol with an extremely low enantiomeric excess (ca. 0.00005% ee) acts as an asymmetric autocatalyst to afford the same alkanol with significantly amplified ee (> 99.5%). Theories of the origins of homochirality have been examined by using asymmetric autocatalysis with amplification of ee. Circularly polarized light, chiral inorganic crystals, such as quartz, chiral organic crystals composed of achiral compounds, and spontaneous absolute asymmetric synthesis, have been considered as candidates for the origins of chirality. It was found that asymmetric autocatalysis is triggered by these origins of chirality, affording the pyrimidyl alkanol with high ee and with the corresponding absolute configurations to the chirality of the chiral triggers. Chiral isotopomers of carbon (C13/C12), oxygen (O18/O16), and hydrogen (D/H) were also found to trigger asymmetric autocatalysis. Asymmetric autocatalysis enables us to discriminate the chirality of cryptochiral compounds., 23 May 2017, 1, 30, In book, 10.1016/B978-0-12-812824-4.00001-0

Handbook of Astrobiology, CRC Press, The origin and amplification of chirality leading to biological homochirality, Kenso Soai; Arimasa Matsumoto; Tsuneomi Kawasaki, 07 Dec. 2018, 341, 353, In book

Not Refereed, ファインケミカル, Asymmetric Autocatalysis and the Elucidation of the Origin of Homochirality, 松本 有正; 松本有正; そ合憲三, 2016, 45, 2, 58, 67

Not Refereed, 化学工業, 不斉自己触媒反応を用いたキラル化学 ー同位体置換キラル化合物が誘起するエナンチオ選択的反応ー, 松本 有正; 川崎常臣; 松本有正; そ合憲三, 2015, 66, 133, 138

Not Refereed, Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, Society of Synthetic Organic Chemistry, Absolute configuration analysis of organic compounds by single crystal X-ray diffraction, Arimasa Matsumoto, Thanks to the development of automation systems and programs for single crystal X-ray diffraction analysis, X-ray structure analysis have become a familiar technic for organic chemists to obtain structural information. However, determination of the absolute configuration of organic compounds only including light-atom (C, H, N, O) by X-ray diffraction have been a difficult topic due to the weak resonant scattering from light atoms. The main purpose of this review is to introduce recent developments of absolute structure determination method by X-ray structure analysis. New algorisms, such as Hooft parameter and Parsons parameter, make it possible to determine the absolute configuration of organic compound by typical X-ray diffractometer without any special equipment., 2015, 73, 7, 755, 761, 10.5059/yukigoseikyokaishi.73.755

Not Refereed, Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry, Approaches toward the origin of homochirality using the synthetic organic chemistry - Asymmetric autocatalysis with amplification of enantiomeric excess, Tsuneomi Kawasaki; Itaru Sato; Hiroko Mineki; Arimasa Matsumoto; Kenso Soai, Asymmetric autocatalysis with amplification of enantiomeric excess is found in the enantiose-lective addition of diisopropylzinc to pyrimidine-5- carbaldehyde using pyrimidyl alkanol as an asymmetric autocatalyst. Asymmetric autocatalysis has been employed as a method for clarifying the origin of homochirality. Circularly polarized light, quartz and statistical fluctuation of enantio-meric imbalance act as chiral triggers for asymmetric autocatalysis to afford highly enantioen-riched products. We have investigated the asymmetric autocatalysis using chiral crystals formed from achiral and racemic compounds as the origins of chirality. Absolute control of the crystal chirality of cytosine was achieved by the removal of crystal water of achiral cytosine monohydrate. Enantioselective carbon-carbon bond formation on the enantiotopic crystal face of aldehyde was established by using the vapor of diisopropylzinc. In addition, asymmetric autocatalysis triggered by chiral compounds arising from H, C and O isotopes substitution has been achieved. Reversal phenomena of enantioselectivity were observed in β-amino alcohol catalyzed dialkylzinc addition to aldehyde by using the mixture of two different β-amino alcohols as chiral ligands., 2013, 71, 2, 109, 123, Book review, 10.5059/yukigoseikyokaishi.71.109

Not Refereed, CHIMICA OGGI-CHEMISTRY TODAY, TEKNOSCIENZE PUBL, Asymmetric autocatalysis Pathway to the biological homochirality, Tsuneomi Kawasaki; Arimasa Matsumoto; Kenso Soai, Amplifi cation of enantiomeric excess (ee) is a key feature for the chemical evolution of biological homochirality from the viewpoint of the origin of chirality. We describe the amplifi cation of ee in asymmetric autocatalysis of 5-pyrimidyl alkanol in the reaction between diisopropylzinc and pyrimidine-5-carbaldehyde. During the asymmetric autocatalysis, very low ee (ca. 0.00005 %) can be amplifi ed to become more than 99.5% ee. Because the proposed origins of chirality, such as circularly polarized light, chiral inorganic quartz and statistical fluctuations of ee in racemic compounds, can initiate asymmetric autocatalysis with amplifi cation of ee, these proposed origins of chirality can be linked with enantiopure organic compounds via asymmetric autocatalysis. Spontaneous absolute asymmetric synthesis has been achieved for the first time. In addition, we describe how the crystal chirality of cytosine generated by the dehydration of crystal water can trigger asymmetric autocatalysis. Thus, the achiral nucleobase, cytosine, is one of the candidates for the origin of chirality. Asymmetric autocatalysis can correlate the chiral isotopomers to the highly enantioenriched 5-pyrimidyl alkanol, that is, D/H-, C-13/C-12- and O-18/O-16-substituted chiral isotopomers can act as chiral initiators of asymmetric autocatalysis. Therefore, the tiny isotope chirality could be another explanation for the origin of chirality., Sep. 2012, 30, 5, 10, 13, Book review

Not Refereed, CHIMICA OGGI-CHEMISTRY TODAY, Asymmetric Autocatalysis. Pathway to The Biological Homochirality, Matsumoto Arimasa; Tsuneomi Kawasaki; Arimasa Matsumoto; Kenso Soai, 2012, 30, 5, 10, 13

Israel Journal of Chemistry, Wiley, Asymmetric Autocatalysis as a Link Between Crystal Chirality and Highly Enantioenriched Organic Compounds, Kenso Soai; Arimasa Matsumoto; Tsuneomi Kawasaki, 09 Aug. 2021, 61, 9-10, 507, 516, Introduction scientific journal, 10.1002/ijch.202100047

Iron-Catalyzed Synthesis of Fused Aromatic Compounds via C-H Bond Activation, Springer, 2014, Not Refereed, 9784431549277

Iron-Catalyzed Synthesis of Fused Aromatic Compounds via C-H Bond Activation, Springer, 2014, Not Refereed, 9784431549277

CSJ Current Review 13 キラル化学 15章 不斉自己増殖とホモキラリティの起源, 日本化学会, 2013, Not Refereed, 9784759813739

Asymmetric Autocatalysis: The Soai Reaction, Kenso Soai; Tsuneomi Kawasaki; Arimasa Matsumoto, Aug. 2022, 9781839162619

Poster presentation, 17 Sep. 2023, 21 Sep. 2023

Poster presentation, 24 Jul. 2023, 27 Jul. 2023

Arimasa Matsumoto, Ayame Tanaka, Yuji Mikata, Kenso Soai, Chirality 2019, Mechanistic Study of Asymmetric Autocatalysis Using CD spectrum: Temperature and Concentration Effect on Catalysts Aggregation Structure, 15 Jul. 2019, 14 Jul. 2019, 17 Jul. 2019

ICPAC2018, Mechanistic Insight of Asymmetric Autocatalysis of Pyrimidyl Alkanol by Structure Analysis of Zinc Alkoxide Complexes, 2018

Chirality 2017, Chirality Generation by Crystal Phase Transition of Achiral Benzophenone Derivatives, 2017

錯体化学会第67回討論会, Achiral to Chiral Crystal Phase Transition of Achiral Achiral to Chiral Crystal Phase Transition of Benzophenone Derivatives and Asymmetric Autocatalysis Initiated by the Crystal Chirality, 2017

Chirality 2017, Chirality Generation by Crystal Phase Transition of Achiral Benzophenone Derivatives, 2017

The 67th Confeence of Japan Society of Coordination Chemistry, Achiral to Chiral Crystal Phase Transition of Achiral Achiral to Chiral Crystal Phase Transition of Benzophenone Derivatives and Asymmetric Autocatalysis Initiated by the Crystal Chirality, 2017

Springer Thesis Prize, 2014

有機合成化学協会 研究企画賞, 2013, Japan

25th International Synposium on Molecular Chirality (Chirality 2013:ISCD-25) Poster Award, 2013

東京大学大学院理学系研究科 研究奨励賞, 2012, Japan

万有生命科学振興国際交流財団 大津会議アワードフェロー, 2010, Japan

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Apr. 2020, Mar. 2022, 20H04674, Principal investigator, Chiral Property Control by Crystal Phase Transition, 松本 有正, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Nara Women's University, 4030000, 3100000, 930000, 分子が右手、左手の関係のように自身の鏡像となり重なり合わない、キラリティーという性質は、生体分子の多くがキラリティーを持つため有機合成分野においてこれまでも重要な研究課題であった。これに対して近年、キラリティーの概念は有機合成や分子のキラリティーだけでなく、集合体やナノ構造が持つキラリティーやキラル物性の応用が注目を集めている。本研究は本来キラリティーを持たないアキラルな分子が結晶化する際に、分子の配向や周期構造にキラリティーが現れる、アキラル化合物のキラル結晶化現象に着目し，結晶構造の持つキラリティーやキラルな結晶構造への分子の取り込みによって，キラリティーを持たない分子によるキラル物性の発現を目指す物である。前年度までの検討によりアキラルなベンゾフェノン誘導体が比較的キラル結晶化を起こしやすいことに着目し，この分子にアミンなどのドナー部位を持たせることでドナーアクセプター型の固体発光分子の合成、結晶化を行い。アキラル分子のみからなるキラルな有機固体発光材料を創出することのに成功している。また今年度の検討では、有機固体分子に対してキラルな光である円偏光を照射することで固体状態での円偏光の吸収特性が可逆に変化するという現象を見いだした。この現象は結晶中での分子の配列のキラリティーが、光という物理的な外部刺激による変化を受けることを示した例であり、そのメカニズムまではまだ明らかにできなかったが、光によるキラリティーのコントロール可能な有機結晶材料という応用上、興味深い発見である。, kaken

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Apr. 2018, Mar. 2020, 18H04518, Principal investigator, Development of Chirality Controllable Soft Crystal, 松本 有正, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Nara Women's University, 4290000, 3300000, 990000, 結晶構造にも分子と同様に対称心や鏡映面を持たないキラルな結晶が存在する。二酸化ケイ素が右水晶と左水晶を形成するように，アキラル化合物が結晶化によってキラルな構造を形成する場合がある。このアキラル化合物のキラル結晶化現象は，分子不斉の発生，ホモキラリティーの起源などの観点から興味深い現象である事に加え，結晶構造変化によりキラリティーが可変の新たな材料の創成に繋がると期待される。 本研究は申請者が見出した単結晶のアキラル相からキラル相への結晶相転移によるキラリティーの発現という新現象に基づき，そのメカニズム解明および一般性の検証を行うことで相転移を利用してキラル物性が変化するという新たなソフトクリスタルを創出する事を目的とする。 前年度までの研究により，アキラルおよびキラルの両多形をもつベンゾフェノン誘導体についてその結晶化条件を精密に精査しアキラル結晶およびキラル結晶を再現性よく作り分ける事や，アキラルな結晶がキラル結晶の接触により，単結晶-単結晶相転移を起こし，キラリティーがアキラル結晶に伝搬することを見出している。本年度の研究ではさらに通常アキラルな結晶構造を与えるフルオロベンゾフェノンなどの分子であっても，他のベンゾフェノン誘導体と共結晶化をさせることで，キラルな結晶多形に誘導あるいは共結晶化させる事に成功している。これらのベンゾフェノン誘導体のいくつかは強いリン光を発する物も見つかっており。この共結晶化によるキラル結晶化と組み合わせることで，キラル結晶とならないアキラルな発光分子であっても円偏光発光特性などキラルな物性を持たせることが可能になると考えられる。, kaken

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Apr. 2017, Mar. 2019, 17H05384, Principal investigator, Research of Chiral Zinc Alkoxide Complexes for Asymmetric Amplification, 松本 有正, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Nara Women's University, 4940000, 3800000, 1140000, 不斉増幅現象は天然物のホモキラリティーの起源解明につながる科学全般から興味をもたれる現象であり,さらに不斉合成、不斉分割といった有機合成化学へ の応用も期待される重要な現象である。本研究は著しい不斉増幅を引き起こす唯一の不斉自己触媒反応であるピリミジルアルカノールを不斉触媒とするピリミジン-5-カルバルデヒド類へのジイソプロピル亜鉛試薬の付加反応において、亜鉛アルコキシドの配位多量体構造が不斉増幅の鍵になっていることに着目し、その配 位多量体構造をX線結晶構造解析、円二色性（CD）スペクトル、量子化学計算を用いて解明し不斉増幅の鍵となる配位構造を明らかとすることを目的としている。 前年度までの研究によりこの高い不斉増幅を引き起こす不斉自己触媒であるピリミジルアルカノール亜鉛アルコキシドのＣＤスペクトルが温度により興味深い変化を引き起こす事を見出している。本年度ではさらにこのＣＤスペクトルの変化について検討をおこない，濃度や溶媒効果による変化を起こすことを見出した。さらに触媒の構造として考えられるいくつかの会合構造に対して，時間依存型密度汎関数法(TD-DFT法)によるＣＤスペクトル計算を行い，観測されたスペクトルの変化が触媒の会合状態の平衡の変化による物であることを明らかとした。触媒が会合状態を作る事は不斉増幅のメカニズムの鍵となると考えられており，この溶液中での会合状態挙動を明らかとした本研究は不斉増幅のメカニズム解明に大きな進歩をもたらす物である。またＣＤスペクトルにより触媒の溶液中での会合状態を明らかとした本研究は不斉反応のメカニズム解明にＣＤスペクトル測定が有効な分析手法であることを示した初めての例である。, kaken

Grant-in-Aid for Scientific Research (C), Apr. 2022, Mar. 2025, 22K05254, Principal investigator, Induction and Control of Photophysical Properties by Asymmetric Crystal Structures, 松本 有正, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Nara Women's University, 4290000, 3300000, 990000, kaken

Apr. 2017, Mar. 2019, 17H05384, Principal investigator

Apr. 2018, Mar. 2020, 18H04518, Principal investigator

Apr. 2020, Mar. 2022, 20H04674, Principal investigator

Grant-in-Aid for Scientific Research (B), 01 Apr. 2015, 31 Mar. 2018, 15H03781, Study on the Origin of Chirality of Chiral Compounds by Using Asymmetric Autocatalysis, Soai Kenso, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Tokyo University of Science, 13780000, 10600000, 3180000, Asymmetric autocatalysis of pyrimidyl alkanol between diisopropylzinc and pyrimidine-5-carbaldehyde is a reaction in which chiral product acts as a chiral catalyst for its own production with amplification of enantiomeric excess (Soai reaction). The origin of chirality of chiral compounds has attracted much attention. We examined the origin of homochirality by using asymmetric autocatalysis. We found the enantiotopic face of achiral inorganic gypsum, nitrogen isotope (15N/14N) chiral diamine, chiral retgersite mineral, and chiral mesoporous silica act as chiral triggers of asymmetric autocatalysis to afford enantioenriched pyrimidyl alkanols with the corresponding absolute configurations with those of chiral triggers. We also elucidated the catalyst structure of asymmetric autocatalysis. We found that the change of temperature reverses of the sense of enantioselectivity of asymmetric autocatalysis using aromatic alkanols and amines as chiral triggers., kaken

Grant-in-Aid for Scientific Research (S), 2008, 2012, 20225002, The Origins of Chirality and Amplification in Asymmetric Autocatalysis, SOAI Kenso; KAWASAKI Tsuneomi; SHIBATA Takanori; SHINDO Hitoshi; MATSUMOTO Arimasa; TSUKIYAMA Koichi; MIYAMURA Kazuo; SAITO Yukio, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Tokyo University of Science, 206960000, 159200000, 47760000, Biologically related compounds such as L-amino acids are composed of one of the enantiomers. The phenomenon is called biological homochirality, and the origin of homochirality has attracted broad interest. Asymmetric autocatalysis, i.e., Soai reaction, is a reaction in which chiral product acts as a chiral catalyst for its own production. It was found that chiral isotopomers of carbon, hydrogen and oxygen, spontaneous absolute asymmetric synthesis, chiral crystals formed from achiral organic compounds such as nucleic acid base act as chiral initiators of asymmetric autocatalysis. Highly enantioenriched chiral compounds withthe corresponding absolute configurations with those of chiral initiators are obtained., kaken

Grant-in-Aid for Young Scientists (B), 01 Apr. 2014, 31 Mar. 2017, 26810026, Asymmetric Autocatalysis Induced by Crystal or Surface Chirality of Achiral Compounds, Matsumoto Arimasa, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Tokyo University of Science, 3900000, 3000000, 900000, Some achiral compounds have a chirality in the crystal structure or crystal surface. The main purpose of this study is achieving the asymmetric induction in molecular chirality by using crystal chirality or surface chirality without any chiral compounds. In the course of this study, asymmetric induction with chiral crystal of achiral ethylendiamine sulfate, phenol derivatives, and nickel sulfate hexahydrate were achieved by using asymmetric amplification effect of asymmetric autocatalytic reaction. Furthermore, asymmetric autocatalysis induced by surface chirality also achieved by using the 2-dimentional surface chirality of achiral gypsum crystal. This is the first example of asymmetric induction of reaction selectivity by using the surface chirality of crystal., kaken