α-allylated chiral thioxanones: Diastereoselective preparation by an S-alkylation/[2,3]-sigmatropic rearrangement sequence.
作者:S.Hasan Tahir、Marilyn M. Olmstead、Mark J. Kurth
DOI:10.1016/s0040-4039(00)92621-2
日期:1991.1
Diastereoselective S-allylation of thioxanone 6 and subsequent ylid formation/[2,3]-sigmatropic rearrangement delivers excellent C-alpha-induction. Non-stereospecific C-beta-induction results from scrambling of olefin geometry in the S-allylation step.