The reactions of styrene derivatives and t-butyl α-diazoacetate using (R,R)-(salen)cobalt(II) complex 6 as a catalyst in the presence of N- methylimidazole gave the corresponding cyclopropanecarboxylates with excellent enantio- (>95% ee) and high cis-stereoselectivity (98%) as well as good chemical yields. (C) 2000 Elsevier Science Ltd.
All Science Journal Classification (ASJC) codes
- Drug Discovery
- Organic Chemistry