Asymmetric Cyclopropanation Catalyzed by Four Stereoisomers of a Copper-(Schiff-base) Complex with Double Chiral Centers  

作　　者：Chang Sheng JIANG You Gui LI Chen JIANG Fang WANG Tian Pa YOU 

机构地区：[1]Department of Chemistry,Universtity of Science&Technology of China,Hefei 230026

出　　处：《Chinese Chemical Letters》2002年第12期1143-1146,共4页中国化学快报(英文版)

摘　　要：Four stereoisomers of a copper-(Schiff-base) complex with double chiral centers were applied to catalyze the asymmetric cyclopropanation. Two of the stereoisomers were also efficient catalysts affording high enantiomeric excess of up to 91.8%. A mechanism that predicts the observed results accurately was proposed.Four stereoisomers of a copper-(Schiff-base) complex with double chiral centers were applied to catalyze the asymmetric cyclopropanation. Two of the stereoisomers were also efficient catalysts affording high enantiomeric excess of up to 91.8%. A mechanism that predicts the observed results accurately was proposed.

关 键 词：Asymmetric cyclopropanation copper-(Schiff-base) OLEFINS diazoacetates. 

分 类 号：O643.3[理学—物理化学]