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Nakamura T, Ishikawa H, Ban K, Yoshida Y, Mino T, Kasashima Y, Sakamoto M. Attrition-Enhanced Asymmetric Transformation of Axially Chiral Nicotinamides by Dynamic Chiral Salt Formation. Chempluschem 2021; 87:e202100504. [PMID: 35023638 DOI: 10.1002/cplu.202100504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/28/2021] [Indexed: 12/30/2022]
Abstract
Atroposelective resolution for axially chiral nicotinamides was achieved by dynamic chiral salt formation with L-DBTA using six types of nicotinamides that could not be optically resolved by the preferential crystallization method. Kinetic studies of their racemization indicated that the chiral conformation was retained for a significant period of time. Two methods of crystallization-induced asymmetric transformation were examined by dynamic diastereomeric salt formation: solvent evaporation from a supersaturated solution, and attrition-enhanced asymmetric transformation. The attrition method was more effective for asymmetric amplification of diastereomeric salts of axially chiral materials. Attrition of equimolar amount of the nicotinamide salts with L-DBTA converged to one diastereomer salts, and the corresponding enantiomers in 87-99 % ee were obtained after the chiral acid was removed. Changing the ratio of two of the nicotinamides with L-DBTA to 1 : 2 inverted the axial chirality.
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Affiliation(s)
- Takumi Nakamura
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering, Chiba University, Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan
| | - Hiroki Ishikawa
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering, Chiba University, Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan
| | - Kazuma Ban
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering, Chiba University, Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan
| | - Yasushi Yoshida
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering, Chiba University, Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering, Chiba University, Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan
| | - Yoshio Kasashima
- Education Center, Faculty of Creative Engineering, Chiba Institute of Technology Shibazono, Narashino, Chiba, 275-0023, Japan
| | - Masami Sakamoto
- Department of Applied Chemistry and Biotechnology Graduate School of Engineering, Chiba University, Yayoi-cho, Inage-ku, Chiba, Chiba, 263-8522, Japan
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2
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Li X, Jandl C, Bach T. Visible-Light-Mediated Enantioselective Photoreactions of 3-Alkylquinolones with 4-O-Tethered Alkenes and Allenes. Org Lett 2020; 22:3618-3622. [DOI: 10.1021/acs.orglett.0c01065] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinyao Li
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747 Garching, Germany
| | - Christian Jandl
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747 Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747 Garching, Germany
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3
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Ishikawa H, Ban K, Uemura N, Yoshida Y, Mino T, Kasashima Y, Sakamoto M. Attrition‐Enhanced Deracemization of Axially Chiral Nicotinamides. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901826] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hiroki Ishikawa
- Department of Applied Chemistry and Biotechnology Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Kazuma Ban
- Department of Applied Chemistry and Biotechnology Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Naohiro Uemura
- Department of Applied Chemistry and Biotechnology Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Yasushi Yoshida
- Department of Applied Chemistry and Biotechnology Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
- Molecular Chirality Research Center Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
- Molecular Chirality Research Center Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
| | - Yoshio Kasashima
- Education Center Faculty of Creative Engineering Chiba Institute of Technology Shibazono, Narashino 275‐0023 Chiba Japan
| | - Masami Sakamoto
- Department of Applied Chemistry and Biotechnology Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
- Molecular Chirality Research Center Graduate School Engineering Chiba University Yayoi‐cho, Inage‐ku 263‐8522 Chiba Japan
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4
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Sarkar R, Mukherjee S. Enantioselective Direct Vinylogous Allylic Alkylation of 4-Methylquinolones under Iridium Catalysis. Org Lett 2019; 21:5315-5320. [PMID: 31247781 DOI: 10.1021/acs.orglett.9b01934] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The first enantioselective vinylogous allylic alkylation of 4-methylquinolones has been developed. This iridium-catalyzed reaction introduces an allyl group at the γ-position of 4-methyl-2-quinolones with exclusive branched selectivity and an excellent level of enantioselectivity. This in turn allows for the enantioselective synthesis of γ-allylquinolines and related nitrogenous heterocycles. This is the first application of 4-methylquinolones in an enantioselective transformation.
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Affiliation(s)
- Rahul Sarkar
- Department of Organic Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Santanu Mukherjee
- Department of Organic Chemistry , Indian Institute of Science , Bangalore 560012 , India
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5
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Throup A, Patterson LH, Sheldrake HM. Intramolecular thermal stepwise [2 + 2] cycloadditions: investigation of a stereoselective synthesis of [n.2.0]-bicyclolactones. Org Biomol Chem 2018; 14:9554-9559. [PMID: 27722445 PMCID: PMC5066561 DOI: 10.1039/c6ob01661h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new method for the synthesis of highly functionalised cyclobutenes.
Fused cyclobutanes are found in a range of natural products and formation of these motifs in a straightforward and easy manner represents an interesting synthetic challenge. To this end we investigated an intramolecular variant of the thermal enamine [2 + 2] cyclisation, developing a diastereoselective intramolecular enamine [2 + 2] cyclisation furnishing δ lactone and lactam fused cyclobutenes in good yield and excellent diastereoselectivity.
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Affiliation(s)
- Adam Throup
- Institute of Cancer Therapeutics, University of Bradford, Bradford, BD7 1DP, UK.
| | - Laurence H Patterson
- Institute of Cancer Therapeutics, University of Bradford, Bradford, BD7 1DP, UK.
| | - Helen M Sheldrake
- Institute of Cancer Therapeutics, University of Bradford, Bradford, BD7 1DP, UK.
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6
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Ishikawa H, Uemura N, Yagishita F, Baba N, Yoshida Y, Mino T, Kasashima Y, Sakamoto M. Asymmetric Synthesis Involving Reversible Photodimerization of a Prochiral Flavonoid Followed by Crystallization. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701457] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hiroki Ishikawa
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering, and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku 263-8522 Chiba Japan
| | - Naohiro Uemura
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering, and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku 263-8522 Chiba Japan
| | - Fumitoshi Yagishita
- Department of Applied Chemistry; Graduate school of Science and Technology; Tokushima University; Minami-josanjima-cho 770-8506 Tokushima Japan
| | - Nozomi Baba
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering, and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku 263-8522 Chiba Japan
| | - Yasushi Yoshida
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering, and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku 263-8522 Chiba Japan
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering, and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku 263-8522 Chiba Japan
| | - Yoshio Kasashima
- Education Center; Faculty of Creative Engineering; Chiba Institute of Technology; Shibazono 275-0023 Narashino, Chiba Japan
| | - Masami Sakamoto
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering, and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku 263-8522 Chiba Japan
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7
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Mai TT, Viswambharan B, Gori D, Guillot R, Naubron JV, Kouklovsky C, Alezra V. Frozen Chirality of Tertiary Aromatic Amides: Access to Enantioenriched Tertiary α-Amino Acid or Amino Alcohol without Chiral Reagent. Chemistry 2017; 23:5787-5798. [PMID: 28225179 DOI: 10.1002/chem.201700110] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Indexed: 11/05/2022]
Abstract
One of the fundamental and intriguing aspects of life is the homochirality of the essential molecules. In this field, the absolute asymmetric synthesis of α-amino acids is a major challenge. Herein, we report access, by chemical means, to tertiary α-amino acid derivatives in up to 96 % ee without using any chiral reagent. In our strategy, the dynamic axial chirality of tertiary aromatic amides is frozen in a crystal and is responsible for the stereoselectivity of the subsequent steps. Furthermore, we could control the configuration of the final product by manually sorting and selecting the initial crystals. Based on vibrational circular dichroism studies, we could rationalize the observed stereoselectivity.
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Affiliation(s)
- Thi Thoa Mai
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Baby Viswambharan
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Didier Gori
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Régis Guillot
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Jean-Valère Naubron
- Aix Marseille Université, Centrale Marseille, CNRS-Spectropole, FR1739, 13397, Marseille, France
| | - Cyrille Kouklovsky
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
| | - Valérie Alezra
- Univ. Paris-Sud, Laboratoire de Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO, UMR 8182, CNRS, Université Paris-Saclay, Bât 410, 91405, Orsay, France
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8
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Sakamoto M, Shiratsuki K, Uemura N, Ishikawa H, Yoshida Y, Kasashima Y, Mino T. Asymmetric Synthesis by Using Natural Sunlight under Absolute Achiral Conditions. Chemistry 2017; 23:1717-1721. [DOI: 10.1002/chem.201605583] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Masami Sakamoto
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Koh Shiratsuki
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Naohiro Uemura
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Hiroki Ishikawa
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Yasushi Yoshida
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku Chiba 263-8522 Japan
| | - Yoshio Kasashima
- Education Center, Faculty of Engineering; Chiba Institute of Technology; Shibazono, Narashino Chiba 275-0023 Japan
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering and Molecular Chirality Research Center; Chiba University; Yayoi-cho, Inage-ku Chiba 263-8522 Japan
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9
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Affiliation(s)
- Masami Sakamoto
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
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10
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Yagishita F, Kato M, Uemura N, Ishikawa H, Yoshida Y, Mino T, Kasashima Y, Sakamoto M. Asymmetric Synthesis Using Chiral Crystals of Coumarin-3-carboxamides and Carbenoids. CHEM LETT 2016. [DOI: 10.1246/cl.160688] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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11
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Kaji Y, Uemura N, Kasashima Y, Ishikawa H, Yoshida Y, Mino T, Sakamoto M. Asymmetric Synthesis of an Amino Acid Derivative from Achiral Aroyl Acrylamide by Reversible Michael Addition and Preferential Crystallization. Chemistry 2016; 22:16429-16432. [DOI: 10.1002/chem.201604207] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Yuki Kaji
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering; Chiba University, Yayoi-cho, Inage-ku; Chiba 263-8522 Japan
| | - Naohiro Uemura
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering; Chiba University, Yayoi-cho, Inage-ku; Chiba 263-8522 Japan
| | - Yoshio Kasashima
- Education Center; Faculty of Engineering; Chiba Institute of Technology, Shibazono; Narashino, Chiba 275-0023 Japan
| | - Hiroki Ishikawa
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering; Chiba University, Yayoi-cho, Inage-ku; Chiba 263-8522 Japan
| | - Yasushi Yoshida
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering; Chiba University, Yayoi-cho, Inage-ku; Chiba 263-8522 Japan
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering; Chiba University, Yayoi-cho, Inage-ku; Chiba 263-8522 Japan
| | - Masami Sakamoto
- Department of Applied Chemistry and Biotechnology; Graduate School of Engineering; Chiba University, Yayoi-cho, Inage-ku; Chiba 263-8522 Japan
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12
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Poplata S, Tröster A, Zou YQ, Bach T. Recent Advances in the Synthesis of Cyclobutanes by Olefin [2 + 2] Photocycloaddition Reactions. Chem Rev 2016; 116:9748-815. [PMID: 27018601 PMCID: PMC5025837 DOI: 10.1021/acs.chemrev.5b00723] [Citation(s) in RCA: 649] [Impact Index Per Article: 81.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Indexed: 11/30/2022]
Abstract
The [2 + 2] photocycloaddition is undisputedly the most important and most frequently used photochemical reaction. In this review, it is attempted to cover all recent aspects of [2 + 2] photocycloaddition chemistry with an emphasis on synthetically relevant, regio-, and stereoselective reactions. The review aims to comprehensively discuss relevant work, which was done in the field in the last 20 years (i.e., from 1995 to 2015). Organization of the data follows a subdivision according to mechanism and substrate classes. Cu(I) and PET (photoinduced electron transfer) catalysis are treated separately in sections 2 and 4 , whereas the vast majority of photocycloaddition reactions which occur by direct excitation or sensitization are divided within section 3 into individual subsections according to the photochemically excited olefin.
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Affiliation(s)
- Saner Poplata
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - Andreas Tröster
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - You-Quan Zou
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis
Research Center (CRC), Technische Universität
München, D-85747 Garching, Germany
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13
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Simonetti SO, Larghi EL, Kaufman TS. The 3,4-dioxygenated 5-hydroxy-4-aryl-quinolin-2(1H)-one alkaloids. Results of 20 years of research, uncovering a new family of natural products. Nat Prod Rep 2016; 33:1425-1446. [DOI: 10.1039/c6np00064a] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The title alkaloids are discussed. Emphasis is placed on their isolation, source microorganisms and structure, as well as relevant biological activities and synthetic progress.
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Affiliation(s)
- Sebastian O. Simonetti
- Instituto de Química Rosario (IQUIR, CONICET-UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas – Universidad Nacional de Rosario
- (2000) Rosario
- Argentina
| | - Enrique L. Larghi
- Instituto de Química Rosario (IQUIR, CONICET-UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas – Universidad Nacional de Rosario
- (2000) Rosario
- Argentina
| | - Teodoro S. Kaufman
- Instituto de Química Rosario (IQUIR, CONICET-UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas – Universidad Nacional de Rosario
- (2000) Rosario
- Argentina
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14
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Yagishita F, Takagishi N, Ishikawa H, Kasashima Y, Mino T, Sakamoto M. Deracemization of Quinolonecarboxamides by Dynamic Crystalline Salt Formation and Asymmetric Photoreaction by Using the Frozen Chirality. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Nakano SI, Kakugawa K, Nemoto T, Hamada Y. Scandium-Catalyzed Cascade Cyclization to Produce Cyclobutane-Fused Tetrahydroquinoline, Chromane, Thiochromane, and Tetrahydronaphthalene Derivatives. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Yanagisawa Y, Nishiyama Y, Tanimoto H, Morimoto T, Kakiuchi K. Enantiodifferentiating [2+2] photocycloaddition of cyclohexenone carboxylic acid with ethylene using 8-phenylmenthyl amine as a chiral template. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Mayr F, Wiegand C, Bach T. Enantioselective, intermolecular [2+2] photocycloaddition reactions of 3-acetoxyquinolone: total synthesis of (−)-pinolinone. Chem Commun (Camb) 2014; 50:3353-5. [DOI: 10.1039/c3cc49469a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The natural product (−)-pinolinone was synthesised via a concise route (six steps, 17% overall yield) from 3-acetoxyquinolone, employing an enantioselective intermolecular [2+2] photocycloaddition as the key step.
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Affiliation(s)
- Florian Mayr
- Lehrstuhl für Organische Chemie I
- Technische Universität München
- 85747 Garching, Germany
| | - Christian Wiegand
- Lehrstuhl für Organische Chemie I
- Technische Universität München
- 85747 Garching, Germany
| | - Thorsten Bach
- Lehrstuhl für Organische Chemie I
- Technische Universität München
- 85747 Garching, Germany
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18
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Yagishita F, Okamoto K, Kamataki N, Kanno S, Mino T, Kasashima Y, Sakamoto M. Chiral Symmetry Breaking of Axially Chiral Nicotinamide by Crystallization from the Melt. CHEM LETT 2013. [DOI: 10.1246/cl.130796] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Fumitoshi Yagishita
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
- Center for Analytical Instrumentation, Chiba University
| | - Kazuma Okamoto
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Norifumi Kamataki
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Shota Kanno
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Takashi Mino
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Yoshio Kasashima
- Education Center, Faculty of Engineering, Chiba Institute of Technology
| | - Masami Sakamoto
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
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19
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Deracemization of axially chiral nicotinamides by dynamic salt formation with enantiopure dibenzoyltartaric acid (DBTA). Molecules 2013; 18:14430-47. [PMID: 24284493 PMCID: PMC6269860 DOI: 10.3390/molecules181114430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 11/13/2013] [Accepted: 11/19/2013] [Indexed: 11/16/2022] Open
Abstract
Dynamic atroposelective resolution of chiral salts derived from oily racemic nicotinamides and enantiopure dibenzoyltartaric acid (DBTA) was achieved by crystallization. The absolute structures of the axial chiral nicotinamides were determined by X-ray structural analysis. The chirality could be controlled by the selection of enantiopure DBTA as a chiral auxiliary. The axial chirality generated by dynamic salt formation was retained for a long period after dissolving the chiral salt in solution even after removal of the chiral acid. The rate of racemization of nicotinamides could be controlled based on the temperature and solvent properties, and that of the salts was prolonged compared to free nicotinamides, as the molecular structure of the pyridinium ion in the salts was different from that of acid-free nicotinamides.
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20
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Maturi MM, Wenninger M, Alonso R, Bauer A, Pöthig A, Riedle E, Bach T. Intramolecular [2+2] Photocycloaddition of 3- and 4-(But-3-enyl)oxyquinolones: Influence of the Alkene Substitution Pattern, Photophysical Studies, and Enantioselective Catalysis by a Chiral Sensitizer. Chemistry 2013; 19:7461-72. [DOI: 10.1002/chem.201300203] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Indexed: 11/09/2022]
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21
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Campolo D, Gastaldi S, Roussel C, Bertrand MP, Nechab M. Axial-to-central chirality transfer in cyclization processes. Chem Soc Rev 2013; 42:8434-66. [DOI: 10.1039/c3cs60182j] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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22
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Hachiya S, Kasashima Y, Yagishita F, Mino T, Masu H, Sakamoto M. Asymmetric transformation by dynamic crystallization of achiral succinimides. Chem Commun (Camb) 2013; 49:4776-8. [DOI: 10.1039/c3cc41678j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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