α-Lithiation–Electrophile Trapping of <i>N</i>-Thiopivaloylazetidin-3-ol: Stereoselective Synthesis of 2-Substituted 3-Hydroxyazetidines
作者:David M. Hodgson、Christopher I. Pearson、Amber L. Thompson
DOI:10.1021/jo3025225
日期:2013.2.1
α-Lithiation of N-thiopivaloylazetidin-3-ol and subsequent electrophile trapping provides access to a range of 2-substituted 3-hydroxyazetidines with generally good trans-diastereoselectivity, aside from deuteration, which gives the cis-diastereoisomer. Deuterium labeling studies indicate that the initial α-deprotonation occurs preferentially, but not exclusively, in a trans-selective manner. These