Updated on 2024/07/25

 
MORIMOTO Hiroyuki
 
Scopus Paper Info  
Total Paper Count: 0  Total Citation Count: 0  h-index: 16

Citation count denotes the number of citations in papers published for a particular year.

Affiliation
Faculty of Engineering Department of Materials Science
Job
Associate Professor
External link

Research Interests

  • Synthetic Organic Chemistry

Research Areas

  • Nanotechnology/Materials / Synthetic organic chemistry  / organic chemistry

Undergraduate Education

  • 2004.03   The University of Tokyo   Faculty of Pharmaceutical Science   Graduated   Japan

Degree

  • The University of Tokyo  -  Ph.D. (Pharmaceutical Sciences)   2009.03

  • The University of Tokyo  -  M.Sc. (Pharmaceutical Sciences)   2006.03

Biography in Kyutech

  • 2023.04
     

    Kyushu Institute of Technology   Faculty of Engineering   Department of Materials Science   Associate Professor  

Academic Society Memberships

Research Career

  • Development of Greener Synthetic Methods of Nitrogen-Containing Organic Compounds via N-Unsubstituted Ketimines

    研究期間: 2017.04  - 

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    Catalytic nucleophilic addition to ketimines is a straightforward method to access amines having tetrasubstituted carbon stereocenters. These addition reactions, however, generally require N-protected ketimines, and protection/deprotection steps are inevitable to produce useful N-unprotected amines, which precludes the utility of these addition reactions.

    The development of addition reactions to N-unsubstituted ketimines directly affords N-unprotected amines without protection/deprotection steps and thus could overcome the limitations. Nevertheless, the use of N-unsubstituted ketimines in addition reactions has been limited due to the inherent difficulties associated with the N-unsubstituted ketimines, namely, (1) control of reactivity and selectivity without the choice of appropriate N-protective groups and (2) retardation of the reactions caused by N-unprotected amine products.

    With the efforts to address these issues, we found that addition reactions to N-unsubstituted ketimines proceeded in the presence of appropriate metal catalysts and organocatalysts to directly give N-unprotected amines with tetrasubstituted carbon stereocenters in high yield and stereoselectivity. In addition, the N-unprotected amine products were transformed into several biologically active compounds without protective group manipulations on the nitrogen atom, realizing the straightforward access to these pharmaceutically relevant products.

    With the promising results, we next explored the improved synthetic methods of N-unsubstituted ketimines. After screening several catalysts using commercially available bis(trimethylsilyl)amine as a nitrogen source, we found that readily available ketones were transformed into N-unsubstituted ketimines in high yields. Furthermore, subsequent one-pot reactions of N-unsubstituted ketimines provided important nitrogen-containing organic compounds without isolation of N-unsubstituted ketimines.

  • Development of Unactivated Bond Cleavage Reactions Under Mild Conditions Based on Stabilization of Addition Intermediates

    研究期間: 2012.04  - 

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    Carboxylic acid derivatives such as amides and esters are used as essential chemical structures in various fields such as pharmaceuticals, proteins, and polymers. In recent years, they have also been used as protective or directing groups in organic synthesis, and their demand is increasing. Due to their stability, however, cleavage of these bonds generally requires severe reaction conditions, such as strong acids and bases, leaving room for improvement in functional group tolerance.

    To address the issue, we have discovered new reactions based on stabilizing addition intermediates, which enable inactive bonds, usually stable and difficult to cleave, to be cleaved under mild conditions. This strategy allows direct cleavage of stable amide and ester bonds without prior activation. Through experimental and computational analysis of the reaction mechanism, stabilization of the addition intermediates is essential for the reaction to proceed.

Papers

  • Development of Unactivated Bond Cleavage Reactions Under Mild Conditions Based on Stabilization of Addition Intermediates Invited Reviewed

    Morimoto Hiroyuki

    YAKUGAKU ZASSHI ( The Pharmaceutical Society of Japan )   143 ( 12 )   1005 - 1012   2023.12

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    <p>Cleavage of unactivated bonds, such as amides, often requires challenging reaction conditions with strong acids and bases, and the tolerance of functional groups is limited. Therefore, the development of cleavage reactions for unactivated bonds under mild reaction conditions is essential. Herein, I report our recent developments in the cleavage of unactivated bonds under mild conditions. We achieved cleavage of unactivated amides, carbamates, ureas, and esters, as well as chemoselective cleavage of directing groups. Furthermore, we conducted mechanistic studies and found that these reactions proceed through the stabilization of addition intermediates.</p>

    DOI: 10.1248/yakushi.23-00150

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    Other Link: https://www.jstage.jst.go.jp/article/yakushi/143/12/143_23-00150/_pdf

  • Visible-Light-Induced Aminochlorination of Alkenes Reviewed International journal

    Mejri E., Higashida K., Kondo Y., Nawachi A., Morimoto H., Ohshima T., Sawamura M., Shimizu Y.

    Organic Letters   25 ( 24 )   4581 - 4585   2023.06

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acs.orglett.3c01645

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  • Development of Novel Catalytic Direct Syntheses of N-Unsubstituted Ketimines and Their Applications to One-Pot Reactions Reviewed International journal

    Kondo Y., Morimoto H., Ohshima T.

    Synlett   35 ( 4 )   379 - 393   2023.05

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1055/a-2131-3448

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  • Functional Group Evaluation Kit for Digitalization of Information on the Functional Group Compatibility and Chemoselectivity of Organic Reactions Reviewed International journal

    Saito Natsuki, Nawachi Anna, Kondo Yuta, Choi Jeesoo, Morimoto Hiroyuki, Ohshima Takashi

    Bulletin of the Chemical Society of Japan ( The Chemical Society of Japan )   96 ( 5 )   465 - 474   2023.05

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    <p>Digitalization of information on organic reactions is essential for developing next-generation organic syntheses with artificial intelligence and machine-learning (ML) methods. In this regard, reliable information on functional group compatibility and chemoselectivity is critical for understanding the applicability of the reactions. Herein, we report the digitalization of organic reactions using a functional group evaluation (FGE) kit that allows for accurate and rapid assessment of information on the functional group compatibility and chemoselectivity of given organic reactions. Our 26 FGE compounds were used to evaluate 4 types of organic reactions (i.e., cross-coupling, proline-catalyzed aldol, condensation, and ketimine synthesis reactions). As a result, we obtained valuable information for developing a new model of retrosynthetic analysis tools and a deeper understanding of these reactions.</p>

    DOI: 10.1246/bcsj.20230047

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  • Organocatalytic Direct Enantioselective Hydrophosphonylation of N-Unsubstituted Ketimines for the Synthesis of α-Aminophosphonates Reviewed International journal

    Yamada K., Kondo Y., Kitamura A., Kadota T., Morimoto H., Ohshima T.

    ACS Catalysis   13 ( 5 )   3158 - 3163   2023.03

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acscatal.2c05953

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  • O- and N-Selective Electrophilic Activation of Allylic Alcohols and Amines in Pd-Catalyzed Direct Alkylation Reviewed International journal

    Lin L., Kataoka S., Hirayama K., Shibuya R., Watanabe K., Morimoto H., Ohshima T.

    Chemical &amp; pharmaceutical bulletin ( The Pharmaceutical Society of Japan )   71 ( 2 )   101 - 106   2023.01

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    Language:English   Publishing type:Research paper (scientific journal)

    <p>Catalytic control of chemoselectivity is crucial in the synthesis of highly functionalized compounds. Although there are reports of efficient chemoselective reactions of alcohols and amines as nucleophiles, there are no reports of the chemoselective activation of alcohols and amines as electrophiles. In this study, highly <i>O</i>- and <i>N</i>-selective electrophilic activation of allylic alcohols and amines was achieved in Pd-catalyzed direct allylic alkylation. Allylamines were inherently more reactive than allylic alcohols (<i>N</i>-selectivity). On the other hand, the addition of catalytic amounts of 9-phenanthreneboronic acid preferentially activated allylic alcohols over allylamines (<i>O</i>-selectivity). Density functional theory (DFT) calculations suggested that the <i>N</i>-selectivity is due to the selective activation of allylic amines with ammonium cations, and boronate formation accelerates the activation of allylic alcohols.</p>

    DOI: 10.1248/cpb.c22-00745

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  • One-Pot Catalytic Synthesis of α-Tetrasubstituted Amino Acid Derivatives via in Situ Generation of N-Unsubstituted Ketimines Reviewed International journal

    Kondo Y., Hirazawa Y., Kadota T., Yamada K., Morisaki K., Morimoto H., Ohshima T.

    Organic Letters   24 ( 36 )   6594 - 6598   2022.09

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acs.orglett.2c02587

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  • A TRPC3/6 Channel Inhibitor Promotes Arteriogenesis after Hind‐Limb Ischemia Reviewed International journal

    Shimauchi T., Numaga‐tomita T., Kato Y., Morimoto H., Sakata K., Matsukane R., Nishimura A., Nishiyama K., Shibuta A., Horiuchi Y., Kurose H., Kim S.G., Urano Y., Ohshima T., Nishida M.

    Cells   11 ( 13 )   2022.07

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.3390/cells11132041

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  • Development of Greener Catalytic Synthetic Methods of Nitrogen-Containing Compounds Using <i>N</i>-Unprotected Ketimines Invited Reviewed

    Morimoto Hiroyuki

    Journal of Synthetic Organic Chemistry, Japan ( The Society of Synthetic Organic Chemistry, Japan )   80 ( 1 )   2 - 13   2022.01

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    Authorship:Lead author, Last author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)

    <p>Herein we report our recent efforts on the greener catalytic synthetic methods of nitrogen-containing compounds using <i>N</i>-unprotected ketimines. We found that alkynylation of <i>N</i>-unprotected trifluoromethyl ketimines proceeded in the presence of zinc catalysts, providing the products in good yield with broad functional group tolerance and unique chemoselectivity. Next, we extended the methodology to catalytic stereoselective addition reactions and found that a direct Mannich-type reaction, a Friedel-Crafts-type alkylation reaction, a decarboxylative Mannich-type reaction, and an arylation reaction proceeded in the presence of appropriate metal or organocatalysts to give α-tetrasubstituted amines in high yield and stereoselectivity. The detailed scope and some mechanistic insights of these reactions are also presented.</p>

    DOI: 10.5059/yukigoseikyokaishi.80.2

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  • Catalytic Enantioselective Strecker Reaction of Isatin-Derived N-Unsubstituted Ketimines Reviewed International journal

    Kadota T., Sawa M., Kondo Y., Morimoto H., Ohshima T.

    Organic Letters   23 ( 12 )   4553 - 4558   2021.06

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acs.orglett.1c01194

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  • Development and Integration of New Green Reactions International journal

    大嶋 孝志, 森本 浩之

    Middle Molecular Strategy   15   275 - 295   2021.01

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    Language:English   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)

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  • C-C Bond Cleavage of Unactivated 2-Acylimidazoles Reviewed International journal

    Xin H.L., Pang B., Choi J., Akkad W., Morimoto H., Ohshima T.

    Journal of Organic Chemistry   85 ( 18 )   11592 - 11606   2020.09

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acs.joc.0c01458

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  • Recent Progress on Catalytic Addition Reactions to N-Unsubstituted Imines Reviewed International journal

    Morisaki K., Morimoto H., Ohshima T.

    ACS Catalysis   10 ( 12 )   6924 - 6951   2020.06

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acscatal.0c01212

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  • Recent progress towards the use of benzophenone imines as an ammonia equivalent Reviewed International journal

    Kondo Y., Morimoto H., Ohshima T.

    Chemistry Letters ( The Chemical Society of Japan )   49 ( 5 )   497 - 504   2020.05

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    Authorship:Corresponding author   Language:English   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)

    <p>Benzophenone imine and its derivatives are useful ammonia equivalents for synthesizing primary amines, readily achieving the selective formation of primary amines and obtaining easily deprotectable imines as the product. These advantages have led to the development of various C–N bond-forming reactions in recent years. In this Highlight Review, we summarize the progress related to their reaction patterns.</p>

    DOI: 10.1246/cl.200099

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  • Rhodium(I)/Chiral Diene-Catalyzed Enantioselective Addition of Boronic Acids to N-Unsubstituted Isatin-Derived Ketimines Reviewed International journal

    Yonesaki R., Kusagawa I., Morimoto H., Hayashi T., Ohshima T.

    Chemistry - An Asian Journal   15 ( 4 )   499 - 502   2020.02

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/asia.201901745

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  • Scandium(III) Triflate Catalyzed Direct Synthesis of N-Unprotected Ketimines Reviewed International journal

    Kondo Y., Kadota T., Hirazawa Y., Morisaki K., Morimoto H., Ohshima T.

    Organic Letters   22 ( 1 )   120 - 125   2020.01

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acs.orglett.9b04038

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  • Mechanistic studies of nickel(II)-catalyzed direct alcoholysis of 8-aminoquinoline amides Reviewed International journal

    Morimoto H., Akkad W., Deguchi T., Ohshima T.

    Heterocycles   101 ( 2 )   471 - 485   2020.01

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.3987/COM-19-S(F)30

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  • Identification of candidate molecular targets of the novel antineoplastic antimitotic NP-10 Reviewed International journal

    Yokoyama T., Yukuhiro M., Iwasaki Y., Tanaka C., Sankoda K., Fujiwara R., Shibuta A., Higashi T., Motoyama K., Arima H., Yoshida K., Sugimoto N., Morimoto H., Kosako H., Ohshima T., Fujita M.

    Scientific Reports   9 ( 1 )   2019.12

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1038/s41598-019-53259-2

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  • A Convenient Preparation Method for Benzophenone Imine Catalyzed by Tetrabutylammonium Fluoride Reviewed International journal

    Kondo Y., Morisaki K., Hirazawa Y., Morimoto H., Ohshima T.

    Organic Process Research and Development   23 ( 8 )   1718 - 1724   2019.08

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acs.oprd.9b00226

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  • Ammonium Salt-Accelerated Hydrazinolysis of Unactivated Amides: Mechanistic Investigation and Application to a Microwave Flow Process Reviewed International journal

    Noshita M., Shimizu Y., Morimoto H., Akai S., Hamashima Y., Ohneda N., Odajima H., Ohshima T.

    Organic Process Research and Development   23 ( 4 )   588 - 594   2019.04

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    DOI: 10.1021/acs.oprd.8b00424

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  • 窒素上無保護ケチミンに対する触媒的不斉求核付加反応の開発――四置換炭素含有アミノ酸の環境調和型新規合成手法への展開 Invited Reviewed

    森本 浩之

    化学と工業   72   780 - 781   2019.01

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    Authorship:Lead author, Last author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)

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  • 有機触媒による窒素上無保護α-ケチミノエステルに対する直接的不斉求核付加反応の開発 Invited Reviewed

    森本 浩之

    化学工業(化学工業社)   70   668 - 672   2019.01

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)

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  • 3-Mono-Substituted BINOL Phosphoric Acids as Effective Organocatalysts in Direct Enantioselective Friedel–Crafts-Type Alkylation of N-Unprotected α-Ketiminoester Reviewed International journal

    Yonesaki R., Kondo Y., Akkad W., Sawa M., Morisaki K., Morimoto H., Ohshima T.

    Chemistry - A European Journal   24 ( 57 )   15211 - 15214   2018.10

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    DOI: 10.1002/chem.201804078

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  • Catalytic Enantioselective Decarboxylative Mannich-Type Reaction of N-Unprotected Isatin-Derived Ketimines Reviewed International journal

    Sawa M., Miyazaki S., Yonesaki R., Morimoto H., Ohshima T.

    Organic Letters   20 ( 17 )   5393 - 5397   2018.09

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    DOI: 10.1021/acs.orglett.8b02306

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  • Development of direct enantioselective alkynylation of αketoester and α-ketiminoesters catalyzed by phenylbis(oxazoline)Rh(III) complexes Reviewed

    Morisaki K., Morimoto H., Mashima K., Ohshima T.

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry ( The Society of Synthetic Organic Chemistry, Japan )   76 ( 3 )   226 - 240   2018.01

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    <p>Direct catalytic enantioselective alkynylation of carbonyl compounds and imines is one of the most efficient approaches for the synthesis of propargylic alcohols and propargylamines, which are potent building blocks for synthesizing functionalized molecules. While a variety of methods for the reactions with aldehydes and aldimines have been established, the reactions with ketones and ketimines remain underdeveloped due to their reduced reactivity and difficulty in stereocontrol. In this account, we summarized our studies on direct enantioselective alkynylation reaction of α-ketoester and α-ketiminoesters catalyzed by phenylbis(oxazoline)(phebox)-rhodium(III) complexes, affording enantioenriched propargyl alcohols and propargylamines with a tetrasubstituted carbon stereocenter under proton-transfer conditions. The catalytic system was compatible to a wide range of functional groups, including electrophilic formyl groups, and allowed for the development of an efficient method to access enantioenriched α-CF<sub>3</sub>-substituted thalidomide analogs. Mechanistic studies revealed that generation of the (alkynyl)(phebox)Rh(III) complex from the (diacetato)(phebox)Rh(III) complex determined the overall reaction rate in the initial stages of the reaction. These results, along with the observed facile exchange of the alkynyl ligand on the (alkynyl)(phebox)Rh(III) complexes, led us to use (trimethylsilylethynyl)(phebox)Rh(III) complexes as a new pre-catalyst. The new catalytic system with (trimethylsilylethynyl)(phebox)Rh(III) precatalysts exhibited enhanced catalytic performance, reduced catalyst loading to as low as 0.5 mol%, and expanded the substrate scope of the reaction with less reactive α-ketiminophosphonate and cyclic <i>N</i>-sulfonyl α-ketiminoesters.</p>

    DOI: 10.5059/yukigoseikyokaishi.76.226

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  • Direct Access to N-Unprotected α- and/or β-Tetrasubstituted Amino Acid Esters via Direct Catalytic Mannich-Type Reactions Using N-Unprotected Trifluoromethyl Ketimines Reviewed International journal

    Sawa M., Morisaki K., Kondo Y., Morimoto H., Ohshima T.

    Chemistry - A European Journal   23 ( 67 )   17022 - 17028   2017.12

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    DOI: 10.1002/chem.201703516

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  • Boronic Acid Accelerated Three-Component Reaction for the Synthesis of α-Sulfanyl-Substituted Indole-3-acetic Acids Reviewed

    Das A., Watanabe K., Morimoto H., Ohshima T.

    Organic Letters   19 ( 21 )   5794 - 5797   2017.11

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/acs.orglett.7b02727

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  • Direct Catalytic Alcoholysis of Unactivated 8-Aminoquinoline Amides Reviewed International journal

    Deguchi T., Xin H.L., Morimoto H., Ohshima T.

    ACS Catalysis   7 ( 5 )   3157 - 3161   2017.05

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    DOI: 10.1021/acscatal.7b00442

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  • Direct enantioselective alkynylation of α-ketoesters and α-ketiminoesters catalyzed by [bis(oxazoline)phenyl]rhodium(III) complexes Reviewed International journal

    Morisaki K., Morimoto H., Mashima K., Ohshima T.

    Heterocycles   95 ( 2 )   637 - 661   2017.01

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.3987/REV-16-SR(S)4

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  • Direct access to: N -unprotected tetrasubstituted propargylamines via direct catalytic alkynylation of N -unprotected trifluoromethyl ketimines Reviewed International journal

    Morisaki K., Morimoto H., Ohshima T.

    Chemical Communications   53 ( 47 )   6319 - 6322   2017.01

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1039/c7cc02194a

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  • Synthesis of 1-tetrasubstituted 2,2,2-trifluoroethylamine derivatives via palladium-catalyzed allylation of sp<sup>3</sup> C–H bonds Reviewed International journal

    Morisaki K., Kondo Y., Sawa M., Morimoto H., Ohshima T.

    Chemical and Pharmaceutical Bulletin ( The Pharmaceutical Society of Japan )   65 ( 11 )   1089 - 1092   2017.01

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    <p>This note describes the construction of tetrasubstituted carbon stereocenters <i>via</i> palladium-catalyzed allylation of <i>sp</i><sup>3</sup> C–H bonds of 2,2,2-trifluoroethylamine derivatives. The presence of 2-pyridyl group of the imines derived from 1-substituted-2,2,2-trifluoroethylamine was key to promoting the reaction efficiently, allowing an access to a variety of 1-allylated 2,2,2-trifluoroethylamine derivatives with tetrasubstituted carbon stereocenters.</p>

    DOI: 10.1248/cpb.c17-00580

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  • Diethylenetriamine-Mediated Direct Cleavage of Unactivated Carbamates and Ureas Reviewed International journal

    Noshita M., Shimizu Y., Morimoto H., Ohshima T.

    Organic Letters   18 ( 23 )   6062 - 6065   2016.12

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    DOI: 10.1021/acs.orglett.6b03016

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  • Mechanistic Studies and Expansion of the Substrate Scope of Direct Enantioselective Alkynylation of α-Ketiminoesters Catalyzed by Adaptable (Phebox)Rhodium(III) Complexes Reviewed International journal

    Morisaki K., Sawa M., Yonesaki R., Morimoto H., Mashima K., Ohshima T.

    Journal of the American Chemical Society   138 ( 19 )   6194 - 6203   2016.05

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    DOI: 10.1021/jacs.6b01590

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  • A novel anti-microtubule agent with carbazole and benzohydrazide structures suppresses tumor cell growth in vivo Reviewed International journal

    Ohira M., Iwasaki Y., Tanaka C., Kuroki M., Matsuo N., Kitamura T., Yukuhiro M., Morimoto H., Pang N., Liu B., Kiyono T., Amemiya M., Tanaka K., Yoshida K., Sugimoto N., Ohshima T., Fujita M.

    Biochimica et Biophysica Acta - General Subjects   1850 ( 9 )   1676 - 1684   2015.05

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    DOI: 10.1016/j.bbagen.2015.04.013

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  • Direct catalytic anti-Markovnikov addition reactions of oxygen nucleophiles to simple Alkenes Reviewed

    Morimoto H.

    Yuki Gosei Kagaku Kyokaishi/Journal of Synthetic Organic Chemistry   72 ( 12 )   1402 - 1403   2014.12

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    Development of direct catalytic anti-Markovnikov addition reactions of oxygen nucleophiles to simple alkenes is a difficult challenge due to the propensity to form Markovnikov adducts under ordinary reaction conditions. Herein selected recent examples that realize these reactions with high anti-Markovnikov selectivity are summarized.

    DOI: 10.5059/yukigoseikyokaishi.72.1402

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  • A short scalable route to (-)-α-kainic acid using Pt-catalyzed direct allylic amination Reviewed International journal

    Zhang M., Watanabe K., Tsukamoto M., Shibuya R., Morimoto H., Ohshima T.

    Chemistry - A European Journal   21 ( 10 )   3937 - 3941   2014.10

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    DOI: 10.1002/chem.201406557

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  • Cleavage of unactivated amide bonds by ammonium salt-accelerated hydrazinolysis Reviewed International journal

    Shimizu Y., Noshita M., Mukai Y., Morimoto H., Ohshima T.

    Chemical Communications   50 ( 84 )   12623 - 12625   2014.09

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    DOI: 10.1039/c4cc02014f

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  • Lanthanum(III) triflate catalyzed direct amidation of esters Reviewed International journal

    Morimoto H., Fujiwara R., Shimizu Y., Morisaki K., Ohshima T.

    Organic Letters   16 ( 7 )   2018 - 2021   2014.04

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    DOI: 10.1021/ol500593v

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  • Rh-catalyzed direct enantioselective alkynylation of α-ketiminoesters Reviewed International journal

    Morisaki K., Sawa M., Nomaguchi J.Y., Morimoto H., Takeuchi Y., Mashima K., Ohshima T.

    Chemistry - A European Journal   19 ( 26 )   8417 - 8420   2013.06

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    DOI: 10.1002/chem.201301237

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  • Microwave-assisted deacylation of unactivated amides using ammonium-salt-accelerated transamidation Reviewed International journal

    Shimizu Y., Morimoto H., Zhang M., Ohshima T.

    Angewandte Chemie - International Edition   51 ( 34 )   8564 - 8567   2012.08

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/anie.201202354

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  • Stereodivergent direct catalytic asymmetric mannich-type reactions of α-isothiocyanato ester with ketimines Reviewed International journal

    Lu G., Yoshino T., Morimoto H., Matsunaga S., Shibasaki M.

    Angewandte Chemie - International Edition   50 ( 19 )   4382 - 4385   2011.05

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/anie.201101034

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  • A broadly applicable copper reagent for trifluoromethylations and perfluoroalkylations of aryl iodides and bromides Reviewed International journal

    Morimoto H., Tsubogo T., Litvinas N., Hartwig J.

    Angewandte Chemie - International Edition   50 ( 16 )   3793 - 3798   2011.04

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/anie.201100633

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  • Catalytic asymmetricaza-Morita-Baylis-Hillman reaction of methyl acrylate: Role of a bifunctional La(O- i Pr)<inf>3</inf>/linked-BINOL complex Reviewed International journal

    Yukawa T., Seelig B., Xu Y., Morimoto H., Matsunaga S., Berkessel A., Shibasaki M.

    Journal of the American Chemical Society   132 ( 34 )   11988 - 11992   2010.09

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/ja103294a

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  • Construction of contiguous tetrasubstituted chiral carbon stereocenters via direct catalytic asymmetric aldol reaction of α-isothiocyanato esters with ketones Reviewed International journal

    Yoshino T., Morimoto H., Lu G., Matsunaga S., Shibasaki M.

    Journal of the American Chemical Society   131 ( 47 )   17082 - 17083   2009.12

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/ja908571w

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  • Mixed La-Li heterobimetallic complexes for tertiary nitroaldol resolution Reviewed International journal

    Hara K., Tosaki S., Gnanadesikan V., Morimoto H., Harada S., Sugita M., Yamagiwa N., Matsunaga S., Shibasaki M.

    Tetrahedron   65 ( 26 )   5030 - 5036   2009.06

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1016/j.tet.2009.02.031

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  • Lewis base assisted Brønsted base catalysis: Bidentate phosphine oxides as activators and modulators of brønsted basic lanthanum-aryloxides Reviewed International journal

    Morimoto H., Yoshino T., Yukawa T., Lu G., Matsunaga S., Shibasaki M.

    Angewandte Chemie - International Edition   47 ( 47 )   9125 - 9129   2008.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/anie.200803682

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  • Chiral γ-amino amide synthesis by heterobimetallic lanthanum/lithium/pybox-catalyzed direct asymmetric Mannich-type reactions of α-keto anilides Reviewed International journal

    Lu G., Morimoto H., Matsunaga S., Shibasaki M.

    Angewandte Chemie - International Edition   47 ( 36 )   6847 - 6850   2008.08

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/anie.200801564

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  • A bench-stable homodinuclear Ni<inf>2</inf>-Schiff base complex for catalytic asymmetric synthesis of α-tetrasubstituted anti-α,β- diamino acid surrogates Reviewed International journal

    Chen Z., Morimoto H., Matsunaga S., Shibasaki M.

    Journal of the American Chemical Society   130 ( 7 )   2170 - 2171   2008.02

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/ja710398q

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  • Organolithiums and lithium 2,2,6,6-tetramethylpiperidide in reductive alkylation of epoxides: Synthesis of (E)-alkenes [(E)-2-methyltetradeca-1,3-diene] International journal

    Hodgson D.M., Humphreys P.G., Fleming M.J., Morimoto H., Mihara H., Shibasaki M.

    Organic Syntheses   85   1 - 9   2008.01

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.15227/orgsyn.085.0001

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  • Lanthanum aryloxide/pybox-catalyzed direct asymmetric mannich-type reactions using a trichloromethyl ketone as a propionate equivalent donor Reviewed International journal

    Morimoto H., Lu G., Aoyama N., Matsunaga S., Shibasaki M.

    Journal of the American Chemical Society   129 ( 31 )   9588 - 9589   2007.08

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/ja073285p

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  • Catalytic asymmetric epoxidation of α,β-unsaturated esters with chiral yttrium-biaryldiol complexes Reviewed International journal

    Kakei H., Tsuji R., Ohshima T., Morimoto H., Matsunaga S., Shibasaki M.

    Chemistry - An Asian Journal   2 ( 2 )   257 - 264   2007.07

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/asia.200600309

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  • Catalytic asymmetric Michael reactions of dibenzyl malonate to α,β-unsaturated N-acylpyrroles using a La(O-iPr)<inf>3</inf>/Ph-linked-BINOL complex Reviewed International journal

    Park S.Y., Morimoto H., Matsunaga S., Shibasaki M.

    Tetrahedron Letters   48 ( 16 )   2815 - 2818   2007.04

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1016/j.tetlet.2007.02.112

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  • Catalytic asymmetric epoxidation of α-methyl α,β- unsaturated anilides as ester surrogates Reviewed International journal

    Chen Z., Morimoto H., Matsunaga S., Shibasaki M.

    Synlett   ( 20 )   3529 - 3532   2006.12

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1055/s-2006-956491

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  • Mixed La-Li heterobimetallic complexes for tertiary nitroaldol resolution Reviewed International journal

    Tosaki S., Hara K., Gnanadesikan V., Morimoto H., Harada S., Sugita M., Yamagiwa N., Matsunaga S., Shibasaki M.

    Journal of the American Chemical Society   128 ( 36 )   11776 - 11777   2006.09

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1021/ja064858l

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  • Trichloromethyl ketones as synthetically versatile donors: Application in direct catalytic mannich-type reactions and the stereoselective synthesis of azetidines Reviewed International journal

    Morimoto H., Wiedemann S., Yamaguchi A., Harada S., Chen Z., Matsunaga S., Shibasaki M.

    Angewandte Chemie - International Edition   45 ( 19 )   3146 - 3150   2006.05

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    DOI: 10.1002/anie.200600227

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  • Non-C<inf>2</inf>-symmetric, chirally economical, and readily tunable linked-binols: Design and application in a direct catalytic asymmetric mannich-type reaction Reviewed International journal

    Yoshida T., Morimoto H., Kumagai N., Matsunaga S., Shibasaki M.

    Angewandte Chemie - International Edition   44 ( 22 )   3470 - 3474   2005.05

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    Language:English   Publishing type:Research paper (scientific journal)

    DOI: 10.1002/anie.200500425

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  • Direct catalytic asymmetric Mannich-type reaction of hydroxyketone using a Et<inf>2</inf>Zn/linked-BINOL complex: Synthesis of either anti- or syn-β-amino alcohols Reviewed International journal

    Matsunaga S., Yoshida T., Morimoto H., Kumagai N., Shibasaki M.

    Journal of the American Chemical Society   126 ( 28 )   8777 - 8785   2004.07

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    DOI: 10.1021/ja0482435

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Publications (Books)

Conference Prsentations (Oral, Poster)

  • Development of Greener Synthetic Methods of Nitrogen-Containing Organic Compounds via N-Unsubstituted Ketimines

    Hiroyuki Morimoto

    the 11th International Symposium on Applied Engineering and Sciences(SAES 2023)  2023.11  Universiti Putra Malaysia (UPM) and Kyushu Institute of Technology (Kyutech)

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    Event date: 2023.11.20 - 2023.11.21   Language:English   Country:Malaysia  

    1. INTRODUCTION
    Catalytic nucleophilic addition to ketimines is a straightforward synthetic method to access amines having tetrasubstituted carbon stereocenters. These addition reactions, however, generally require N-protected ketimines, and protection/deprotection steps are inevitable to produce useful N-unprotected amines, which precludes the utility of these addition reactions. The development of addition reactions to N-unsubstituted ketimines directly affords N-unprotected amines without protection/deprotection steps and thus could overcome the limitations [1]. Nevertheless, the use of N-unsubstituted ketimines in addition reactions has been limited due to the inherent difficulties associated with the N-unsubstituted ketimines, namely, (1) control of reactivity and selectivity without the choice of appropriate N-protective groups and (2) retardation of the reactions caused by N-unprotected amine products. Herein, we report our recent efforts to address these issues.

    2. METHODOLOGY
    The reactions were performed according to the procedure described in the original papers [2–3].

    3. RESULTS AND DISCUSSION
    We found that addition reactions to N-unsubstituted ketimines proceeded in the presence of appropriate metal catalysts and organocatalysts to directly give N-unprotected amines with tetrasubstituted carbon stereocenters in high yield and stereoselectivity (Figure 1) [2]. In addition, the N-unprotected amine products were transformed into several biologically active compounds without protective group manipulations on the nitrogen atom, realizing the straightforward access to these pharmaceutically relevant products.
    With the promising results, we next explored the improved synthetic methods of N-unsubstituted ketimines. After screening several catalysts using commercially available bis(trimethylsilyl)amine as a nitrogen source, we found that readily available ketones were transformed into N-unsubstituted ketimines in high yields [3]. Furthermore, subsequent one-pot reactions of N-unsubstituted ketimines provided important nitrogen-containing organic compounds without isolation of N-unsubstituted ketimines.


    Figure 1. Summary of our results

    4. CONCLUSION
    In summary, we developed greener synthetic methods of nitrogen-containing organic compounds via N-unsubstituted ketimines. Detailed information will be disclosed in the presentation.

    Other Link: http://saes.upm.edu.my/

  • Development of Greener Synthetic Methods of Nitrogen-Containing Organic Compounds via N-Unsubstituted Ketimines Invited

    Hiroyuki Morimoto, Takashi Ohshima

    The International University Exchange Symposium on Chemistry 2023 jointly organized by 6th Kyutech-OTU Symposium on Chemistry 2023  2023.11  Kyushu Institute of Technology

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    Event date: 2023.11.09 - 2023.11.10   Language:English   Country:Japan  

    Catalytic nucleophilic addition to C=N bonds of ketimines is a straightforward synthetic method to access amines having tetrasubstituted carbon stereocenters. These addition reactions, however, generally require N-protected ketimines, and protection/deprotection steps are inevitable to produce useful N-unprotected amines, which precludes the utility of these addition reactions. The development of addition reactions to N-unsubstituted ketimines directly affords N-unprotected amines without protection/deprotection steps and thus could overcome the limitations.1 Nevertheless, the use of N-unsubstituted ketimines in addition reactions has been limited due to the inherent difficulties associated with the N-unsubstituted ketimines, namely, (1) control of reactivity and selectivity without the choice of appropriate N-protective groups and (2) retardation of the reactions caused by N-unprotected amine products.
    Herein, we report our recent efforts to address these issues. We found that addition reactions to N-unsubstituted ketimines proceeded in the presence of appropriate metal catalysts and organocatalysts to directly give N-unprotected amines with tetrasubstituted carbon stereocenters in high yield and stereoselectivity.2 In addition, the N-unprotected amine products were transformed into several biologically active compounds without protective group manipulations on the nitrogen atom, realizing the straightforward access to these pharmaceutically relevant products.
    With the promising results, we next explored the improved synthetic methods of N-unsubstituted ketimines. After screening reaction conditions using commercially available bis(trimethylsilyl)amine as a nitrogen source, we found that readily available ketones were transformed into N-unsubstituted ketimines in high yields in the presence of either Lewis acid or Lewis base catalysts.3 Furthermore, subsequent one-pot reactions of N-unsubstituted ketimines provided important nitrogen-containing organic compounds without the isolation of N-unsubstituted ketimines. Detailed information and applications will be disclosed in the presentation.

    Other Link: https://www.kyutech.ac.jp/whats-new/topics/entry-10268.html

Industrial Property

  • 窒素上無保護イミン化合物の合成方法

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    Application no:2018-082703  Date applied:2018.04.24

    Announcement no:2021-155333  Date announced:2021.10.07

  • アミノ基および/または水酸基を有する化合物の製造方法

    大嶋 孝志,森本 浩之,清水 悠平

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    Application no:2014-502426  Date applied:2013.03.04

    Patent/Registration no:第6150347号  Date registered:2017.06.02 

  • G2/M期停止及び細胞死を誘導するベンゾヒドラジド誘導体

    藤田 雅俊,大嶋 孝志,森本 浩之

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    Application no:2011-234309  Date applied:2011.10.25

    Announcement no:2015-013808  Date announced:2015.01.22

  • Fluoroalkylation Methods and Reagents

    John F. Hartwig;Hiroyuki Morimoto;Patrick Fier

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    Application no:WO 2012/024564  Date applied:2010.08.20

    Patent/Registration no:US9758453B2  Date registered:2017.09.12 

Lectures

  • 含窒素有機化合物の環境調和型合成と 実験・計算化学による反応機構の解明

    第10回 グリーンマテリアル研究センター 環境セミナー ~計算化学を使った研究の最前線~  2023.12  九州工業大学先端研究・社会連携本部 産学イノベーションセンター グリーンマテリアル研究センター

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    Language:Japanese   Presentation type:Invited lecture   Venue:九州工業大学若松キャンパス2階セミナー室3   Country:Japan  

Honors and Awards

  • BCSJ Award Article

    The Chemical Society of Japan   Functional Group Evaluation Kit for Digitalization of Information on the Functional Group Compatibility and Chemoselectivity of Organic Reactions   2023.05.15

    Hiroyuki Morimoto

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    Country:Japan

  • 2022年度日本薬学会九州山口支部学術奨励賞

    日本薬学会九州山口支部   付加中間体の安定化を基盤とした 温和な条件下での不活性結合切断反応の開発   2022.11.19

    森本浩之

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    Country:Japan

     アミドに代表されるカルボニル化合物由来の不活性結合の切断は、一般に強酸や強塩基などの厳しい反応条件が必要であり、官能基共存性の面で改善の余地を残していた。この課題に対し、我々は付加中間体の安定化を基盤とする戦略に基づき、通常安定で切断が困難な不活性結合を、温和な条件下切断可能とする新規変換反応を見出した1–4。これにより、安定なアミド結合、エステル結合、炭素−炭素結合などが、事前の活性化を経ずに直接切断できるようになった。また、実験と計算化学を活用した反応機構解析により、反応が想定遷移状態を経由して進行していることも確認した。
     本研究で開発した反応は、容易に入手可能な試薬や触媒によって実施できる点、様々な官能基を有する幅広い基質に適用可能である点、大量スケールやフロー反応への適用も可能な点に特色があり、いずれも実用性の高い手法である。本発表では、それぞれの反応の開発の経緯や基質適用範囲・反応機構解析の詳細について紹介する。

  • 第20回(2020年度)GSC賞奨励賞

    新化学技術推進協会 グリーン・サステイナブル ケミストリー ネットワーク会議(JACI・GSCN会議)   アミン・アミノ酸類の環境調和型新規触媒的合成法の開発   2021.06.28

    森本浩之

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    Country:Japan

  • 第39回有機合成化学奨励賞

    有機合成化学協会   無保護ケチミンを活用した環境調和型新規触媒的含窒素化合物合成手法の開発   2021.02.17

    森本浩之

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    Country:Japan

Grants-in-Aid for Scientific Research

  • Development of Efficient Synthetic Methods of Challenging Nitrogen-Containing Organic Compounds with Tetrasubstituted Carbons

    Grant number:24K09729  2024.04 - 2027.03   Grant-in-Aid for Scientific Research(C)

  • Development of New Environmentally Friendly Catalytic Reactions for the Direct Synthesis of Unprotected Unnatural Amino Acids

    Grant number:18K06581  2018.04 - 2021.03   Grant-in-Aid for Scientific Research(C)

  • Development and applications of novel methodologies for the construction of asymmetric tetrasubstituted carbon stereocenters

    Grant number:15K07860  2015.04 - 2018.03   Grant-in-Aid for Scientific Research(C)

  • Development of catalytic asymmetric addition reactions via direct nucleophilic activation of unactivated C-H bonds

    Grant number:23790014  2011.04 - 2014.03   Grant-in-Aid for Young Scientists(B)

  • 遷移・典型元素による不活性結合活性化型新規触媒反応と普遍元素による代替手法の開発

    Grant number:09J02686  2009.04 - 2011.03   特別研究員奨励費

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    2年目の研究課題は、(1)前年度で明らかになった銅を用いたトリフルオロメチル化反応の更なる展開(基質一般性の確認、トリフルオロメチル銅錯体の市販試薬からの調製、触媒量の銅試薬を用いた脱炭酸反応の更なる効率化)、及び(2)研究計画で実施予定であった新規触媒による脱水素的クロスカップリング反応及びアミノ化・エーテル化反応の開発と普遍元素による置換であった。このうち、(2)の反応の達成には困難が伴うことが判明したため、(1)の研究に注力することとした。
    まず、基質一般性の検討を行ったところ、既存の類似錯体を経由する反応に比べて、温和な条件下で反応が進行し、高い収率にて目的のトリフルオロメチル化された芳香族化合物を得ることに成功した。また、既存の反応では困難な種々の官能基を持った基質に対しても問題なく反応が進行した。
    次に、トリフルオロメチル銅錯体の市販試薬からの調製を試みたところ、安価な試薬の組み合わせでトリフルオロメチル銅錯体が系中にて生成可能である事が判明した。この条件を用いることで、グローブボックスなしでのトリフルオロメチル化反応が可能になり、本反応の応用可能性が飛躍的に向上した。また、本反応はパーフルオロアルキル基の温和な条件下での導入にも適用可能であることが示された。
    なお、触媒量の銅試薬を用いた脱炭酸反応の更なる効率化に関しては、種々検討したものの満足のいく結果を得ることはできなかった。しかしながら、上記で達成されたトリフルオロメチル化反応は既存の反応に比べて十分な基質適用範囲及び温和な反応条件を有しており、本研究により十分な実績を挙げることができたと判断した。

  • 新規エステル等価体を活用した触媒的多不斉中心同時構築法の開発と医薬化学への応用

    Grant number:06J11617  2006.04 - 2009.03   特別研究員奨励費

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    本年度の研究目的は、前年度までに達成された直接的触媒的不斉反応を基盤として、タキソールよりも強力な抗ガン活性を有する天然物(+)-Discodermolideの触媒的不斉全合成に取り組むことであった。しかしながら、本合成に必要なアルドール型の反応の開発には困難を極めた。そこで、本研究当初の研究目的であったトリクロロメチルケトンをエステル等価求核剤とする直接的触媒的不斉反応の更なる展開について検討を行ったところ、ルイス塩基の構造をビスフォスフィンオキシドへと変化させることにより、これまでとは逆の高アンチ選択的な直接的触媒的マンニッヒ型反応が進行することが明らかとなった。また、本反応系はアリールオキシド部位の構造を変化させることにより、エナンチオ選択的反応へと展開可能であった。さらに、本研究の過程において、Pyboxやビスフォスフィンオキシドといったルイス塩基が存在しないと反応が進行しないことが明らかとなり、この知見をもとにルイス塩基によるブレンステッド塩基の活性化というこれまでにない新たな概念を確立することができた。また、得られたマンニッヒ体は他の方法では合成困難な多置換アゼチジンカルボン酸誘導体へと変換可能であることも見いだした。一方、本反応の開発過程でフェノール類のイミンへのオルト位選択的直接的触媒的不斉付加反応が進行することを新たに見いだした。本反応は従来等量の金属試薬が必要であったものが触媒量の希土類触媒により進行している点で興味深い。現在本反応の条件最適化、基質一般性などについて検討をおこなっており。結果がまとまり次第速やかに一流雑誌に発表予定である。

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Other External Funds

  • 非天然無保護アミノ酸類の環境調和型新規触媒的合成法の開発

    2021.04 - 2022.09

    公益信託医用薬物研究奨励富岳基金  

  • 無保護非天然アミノ酸類の環境調和型ワンポット触媒的合成法の開発

    2020.10 - 2021.03

    令和2年度 QRプログラム(新規・わかばチャレンジ)  

  • 窒素上無保護アミン類の環境調和型立体選択的直接合成法の開発

    2020.09 - 2022.05

    2020年度薬学系研究継続助成  

  • 非天然アミノ酸類の環境調和型新規合成手法の開発

    2018.02 - 2019.03

    研究奨励金  

  • 無保護二置換アミノ酸類の直接合成を可能とする新規環境調和型触媒反応の開発

    2018.02 - 2019.03

    平成29年度研究奨励金I  

  • 窒素上無保護アミン類の環境調和型立体選択的直接合成法の開発

    2017.08 - 2020.05

    2017年度薬学系研究助成  

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Other Research Activities

  • 2023年度論文査読

    2023.04
    -
    2024.03

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    2023年度中に計11件の欧文雑誌の原著論文を査読した。

Activities of Academic societies and Committees

  • 次世代を担う有機化学シンポジウム   世話人  

    2014.03 - 2024.04

  • 万有福岡シンポジウム 第17 回 三地区若手交歓会 福岡ミニシンポジウム   世話人  

    2024.05

  • 第55回有機金属若手の会夏の学校   幹事  

    2023.07