Chem. J. Chinese Universities ›› 2003, Vol. 24 ›› Issue (1): 76.

• Preface • Previous Articles     Next Articles

Asymmetric Epoxidation of Olefins Catalyzed by Chiral Iminium Salts Generated in situ from Chiral Amines and Aldehydes

ZHENG Yan-Song, JIANG An   

  1. Department of Chemistry, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2001-11-09 Online:2003-01-24 Published:2003-01-24

Abstract: Asymmetric epoxidation of olefins with oxone was first catalyzed by chiral iminium salts generated in situ from chiral amines and aldehydes. With 2S,5S-2,5-dicyclohexylaminocarbonylpyrolidine and t-butylacetaldehyde, trans-stilbene were epoxdized in 80% conversion, 93% yield and 65% e.e. at 0 ℃.

Key words: Asymmetric epoxidation, Chiral amine, Aldehyde, Iminium salt, Oxone

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