作者:Tushar K. Chakraborty、Pasunoori Laxman
DOI:10.1016/s0040-4039(03)01171-7
日期:2003.6
(Z)-5,6-enoic amide moiety in this molecule was built by stereoselective partial reduction of a skipped diyne precursor. The diene, thus obtained, was transformed into a silyl epoxide that was regioselectively opened with an azide ion to furnish an α-azido-β-hydroxyalkylsilane intermediate. Peterson elimination of this β-hydroxysilane component in the final step resulted in the formation of the (Z)-8,9-enamide
描述了有效的抗真菌和细胞毒性剂(+)-crocacin A的全合成。通过跳过的二炔前体的立体选择性部分还原,建立了该分子中关键的(Z)-5,6-烯酰胺部分。如此获得的二烯被转化为环氧化甲硅烷基,其被叠氮化物离子区域选择性地打开以提供α-叠氮基-β-羟烷基硅烷中间体。在最后一步中,Peterson消除了该β-羟基硅烷组分,导致分子的(Z)-8,9-酰胺部分形成,从而成功完成了其总合成。