A New Sparteine Surrogate for Asymmetric Deprotonation of <i>N</i>-Boc Pyrrolidine
作者:Darren Stead、Peter O'Brien、Adam Sanderson
DOI:10.1021/ol800109s
日期:2008.4.1
The s-BuLi complex of a cyclohexane-derived diamine is as efficient as s-BuLi/(-)-sparteine for the asymmetric deprotonation of N-Boc pyrrolidine. This is the first example of high enantioselectivity using a non-sparteine-like diamine in such reactions. The (S,S)-diamine is a useful (+)-sparteine surrogate and was utilized in short syntheses of (-)-indolizidine 167B and an intermediate for the synthesis