An efficient total synthesis of (+)-aspergillide B has been achieved, which features the C-glycosylation reaction for constructing the 2,6-trans-substituted pyran core, a highly effective four-step sequence without purification to produce the key intermediate 13 and an advantegous E-selective Julia-Kocienski olefination on a highly elaborate substrate. The synthesis confirmed the revised structure of aspergillide B by Uenishi.
The total synthesis of (+)-brefeldin C was accomplished. Anasymmetric aza-Claisen rearrangement developed by our laboratorywas employed to construct the C-4 and C-5 stereogenic centers of(+)-brefeldin C as a key step.
作者:Jian Liu、Ke Xu、Jinmei He、Ling Zhang、Xinfu Pan、Xuegong She
DOI:10.1021/jo900820f
日期:2009.7.17
An efficient total synthesis of (+)-aspergillide B has been achieved, which features the C-glycosylation reaction for constructing the 2,6-trans-substituted pyran core, a highly effective four-step sequence without purification to produce the key intermediate 13 and an advantegous E-selective Julia-Kocienski olefination on a highly elaborate substrate. The synthesis confirmed the revised structure of aspergillide B by Uenishi.