1,2-Asymmetric induction in the SN2'-allylation of organocopper and organozinc reagents
作者:Masayuki Arai、Takashi Kawasuji、Eiichi Nakamura
DOI:10.1021/jo00071a022
日期:1993.9
The S(N)2'-selective reaction of organocopper or organozinc reagents with allylic chlorides having a chiral center at the delta-position proceeds with up to 100% diastereoselectivity. The observed 1,2-asymmetric induction conforms to pure steric control (Cram-Felkin-Anh model) even in cases where conventional chelation control may seem to operate, and the level of the selectivity was found to be much higher than those found for the additions of organometallics to structurally comparable alpha-substituted carbonyl compounds.