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Toda Y, Sato K, Sato K, Nagasaki K, Nakajima H, Kikuchi A, Sukegawa K, Suga H. Asymmetric Cycloadditions of Acyclic Carbonyl Ylides with Aldehydes Catalyzed by a Chiral Binaphthyldiimine-Ni(II) Complex: Enantioselective Synthesis of 1,3-Dioxolanes and Mechanistic Studies by DFT Calculations. Org Lett 2022; 24:4739-4744. [PMID: 35724970 DOI: 10.1021/acs.orglett.2c01682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chiral binaphthyldiimine-Ni(II)-catalyzed asymmetric 1,3-dipolar cycloaddition reactions between acyclic carbonyl ylides generated from donor-acceptor oxiranes and aldehydes are reported. Both aromatic and aliphatic aldehydes could be used as dipolarophiles, providing cis-1,3-dioxolanes with high diastereo- and enantioselectivities. On the basis of mechanistic studies, a monomeric chiral Ni(II) complex was hypothesized to act as the active species for the cycloaddition. The high levels of asymmetric induction are satisfactorily explained by a concerted-asynchronous endo Si-face approach of the aldehyde.
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Affiliation(s)
- Yasunori Toda
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Kayo Sato
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Kensuke Sato
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Kazuma Nagasaki
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Hirotaka Nakajima
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Ayaka Kikuchi
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Kimiya Sukegawa
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - Hiroyuki Suga
- Department of Materials Chemistry, Faculty of Engineering, Shinshu University 4-17-1 Wakasato, Nagano 380-8553, Japan
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