Volume 56, Issue 44 pp. 13814-13818
Communication

Catalytic Asymmetric Mannich Reaction with N-Carbamoyl Imine Surrogates of Formaldehyde and Glyoxylate

Yang'en You

Yang'en You

Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100490 China

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071 China

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Dr. Long Zhang

Dr. Long Zhang

Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100490 China

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071 China

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Linfeng Cui

Linfeng Cui

College of Chemistry, Beijing Normal University, Beijing, 100875 China

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Prof. Xueling Mi

Prof. Xueling Mi

College of Chemistry, Beijing Normal University, Beijing, 100875 China

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Prof. Dr. Sanzhong Luo

Corresponding Author

Prof. Dr. Sanzhong Luo

Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 China

University of Chinese Academy of Sciences, Beijing, 100490 China

Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071 China

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First published: 09 September 2017
Citations: 57

Graphical Abstract

On the bench: N,O-acetals (NOAcs) were developed as bench-stable surrogates for N-carbamoyl (Boc, Cbz, Fmoc) formaldehyde and glyoxylate imines in asymmetric Mannich reactions. This reaction offers a straightforward approach for the asymmetric synthesis of α- or β-amino carbonyls bearing chiral quaternary centers in a practical and highly stereocontrolled manner. EWG=electron-withdrawing group, PG=protecting group.

Abstract

N,O-acetals (NOAcs) were developed as bench stable surrogates for N-carbamoyl, (Boc, Cbz and Fmoc) formaldehyde and glyoxylate imines in asymmetric Mannich reactions. The NOAcs can be directly utilized in the chiral primary amine catalyzed Mannich reactions of both acyclic and cyclic β-ketocarbonyls with high yields and excellent stereoselectivity. The current reaction offers a straightforward approach in the asymmetric synthesis of α- or β-amino carbonyls bearing chiral quaternary centers in a practical and highly stereocontrolled manner.

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