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1. Enantioselective alkynylation of N-sulfonyl α-ketiminoesters via a Friedel–Crafts alkylation strategy.

Author

Liu, Ren-Rong, Zhu, Lei, Hu, Jiang-Ping, Lu, Chuan-Jun, Gao, Jian-Rong, Lan, Yu, and Jia, Yi-Xia

Subjects
ENANTIOSELECTIVE catalysis, HETEROGENEOUS catalysis, ESTERS, ALKYNES, HYDROCARBONS
Abstract

Enantioselective alkynylation of cyclic N-sulfonyl α-ketiminoesters with terminal alkynes was developed by using an Ni(ClO4)2/(R)-DTBM-Segphos complex as a catalyst. A range of propargylic amides bearing quaternary stereocenters were afforded in excellent enantioselectivities (up to 97% ee). Theoretical studies revealed that this reaction proceeded via a Friedel–Crafts-type reaction pathway. [ABSTRACT FROM AUTHOR]

Published
2017
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