Photocatalytic enantioselective α-aminoalkylation of acyclic imine derivatives by a chiral copper catalyst

Bowen Han, Yanjun Li, Ying Yu and Lei Gong ()
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Bowen Han: Xiamen University, Xiamen
Yanjun Li: Xiamen University, Xiamen
Ying Yu: Xiamen University, Xiamen
Lei Gong: Xiamen University, Xiamen

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Copper-based asymmetric photocatalysis has great potential in the development of green synthetic approaches to chiral molecules. However, there are several formidable challenges associated with such a conception. These include the relatively weak visible light absorption, short excited-state lifetimes, incompatibility of different catalytic cycles, and the difficulty of the stereocontrol. We report here an effective strategy by means of single-electron-transfer (SET) initiated formation of radicals and photoactive intermediates to address the long-standing problems. Through elaborate selection of well-matched reaction partners, the chiral bisoxazoline copper catalyst is engaged in the SET process, photoredox catalysis, Lewis acid activation and asymmetric induction. Accordingly, a highly enantioselective photocatalytic α-aminoalkylation of acyclic imine derivatives has been accessed. This strategy sheds light on how to make use of diverse functions of a single transition metal catalyst in one reaction, and offers an economic and simplified approach to construction of highly valuable chiral vicinal diamines.

Date: 2019
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DOI: 10.1038/s41467-019-11688-7

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