Stereocontrol in the nucleophilic epoxidation of α-(1-hydroxyalkyl)-α,β-unsaturated sulfones
作者:Richard F.W. Jackson、Stephen P. Standen、William Clegg、Andrew McCamley
DOI:10.1016/s0040-4039(00)60042-4
日期:1992.10
Epoxidation of β-unsubstituted-α-(1-hydroxyalkyl)-α,β-unsaturated sulfones 3 with lithium t-butylperoxide proceeds with high diastereoselectivity to give the syn epoxy alcohols 6. Epoxidation of the triisopropylsilyl ethers 5, however, leads to the anti epoxy ethers 9 with moderate to good selectivity. In contrast to this, epoxidation of (E)-β-phenyl-α-(1-hydroxyalkyl)-α,β-unsaturated sulfones 4 proceeds