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.
立体二砜18a和18b是聚酮化合物合成的关键中间体。该说明描述了由对映体纯环氧化合物2合成18a和18b的过程。这两个序列已针对大规模合成进行了优化,从而在避免色谱分离的同时,一次操作即可获得80-85%的总收率(一次操作意味着不需要在整个合成过程中进行结晶或蒸馏)。