Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (2): 235-241.doi: 10.1007/s40242-014-3396-4

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Lewis Base Organocatalyzed Enantioselective Hydrosilylation of α-Keto Ketimines

LIU Lixin1,2, ZHENG Yongsheng1,2, HU Xiaoyan1,2, LIAN Chunxia1, YUAN Weicheng1, ZHANG Xiaomei1   

  1. 1. Key Laboratory for Asymmetric Synthesis &Chirotechnology of Sichuan Province, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, P. R. China;
    2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2013-09-22 Revised:2013-10-09 Online:2014-04-01 Published:2013-11-25
  • Contact: ZHANG Xiaomei E-mail:xmzhang@cioc.ac.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.20972155).

Abstract:

A chiral Lewis base organocatalyzed enantioselective hydrosilylation of α-keto ketimines was investigated. The reactions afforded various enantioenriched α-amino ketones with good yields(up to 95%) in moderate to good enantioselectivities(up to 98% e.e.). Furthermore, one of the products was reduced to a chiral 1,2-amino alcohol. Following cyclization of it with triphosgene generated a cannabinoid receptor 1(CB1) inhibitor with good diastereoselectivity.

Key words: Amino alcohol, Asymmetric catalysis, Hydrosilylation