作者:Roderick W. Bates、S. Sridhar
DOI:10.1021/jo200699k
日期:2011.6.17
of the stemona alkaloid, stenine, has been synthesized starting from pyrrole, employing an asymmetric organocatalyzed cyclization, Sonogashira coupling, a diastereoselective intramolecular propargylic Barbier reaction, cyclocarbonylation, and diastereoselective alkene reduction. Modulation of the electron-rich nature of the pyrrole nucleus by employing an α-trifluoroacetyl group is essential. The α-trifluoroacetyl
茎生物碱,Stenine的骨架已从吡咯开始合成,采用不对称有机催化环化,Sonogashira偶联,非对映选择性分子内炔丙基巴比耶反应,环羰基化和非对映选择性烯烃还原。通过使用α-三氟乙酰基来调节吡咯核的富电子性质是必不可少的。在仔细定义的温和条件下,可以快速去除α-三氟乙酰基。