Second-Generation Synthesis of <i>syn</i>- and <i>anti</i>-Cycloheptadienylsulfone Polyketide Stereodiads
作者:Mohammad N. Noshi、Ahmad El-Awa、Philip L. Fuchs
DOI:10.1021/jo702353e
日期:2008.4.1
Stereodiad sulfones 18a and 18b are key intermediates for polyketide synthesis. This note describes the synthesis of 18a and 18b from enantiopure epoxide 2. The two sequences have been optimized for large-scale synthesis to give 80−85% overall yields in one operation (one operation implies that no crystallization or distillation is required throughout the synthesis) while avoiding chromatography.