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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 2022; 87:e202100504. [PMID: 35023638 DOI: 10.1002/cplu.202100504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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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Kolarovič A, Jakubec P. State of the Art in Crystallization‐Induced Diastereomer Transformations. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100473] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Andrej Kolarovič
- Department of Chemistry Faculty of Education Trnava University Priemyselná 4 918 43 Trnava Slovakia
| | - Pavol Jakubec
- Institute of Organic Chemistry Catalysis and Petrochemistry Slovak University of Technology Radlinského 9 812 37 Bratislava Slovakia
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Lee H, Park Y, Jung H, Kim ST, Sin S, Ko E, Myeong IS, Moon H, Suhl CH, Jung Y, Jung E, Lee J, Lee KY, Oh CY, Song J, Yoon SH, Kang W, Jung J, Shin H. Synthesis of the C1–C13 fragment of eribulin mesylate. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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