PRACTICAL ROUTE TO A β-KETOPHOSPHONATE, A KEY INTERMEDIATE FOR THE TOTAL SYNTHESIS OF 20(S)-CPT AND RELATED ANALOGUES
作者:Ming Huo、Yun-Yan Kuang、Fen-Er Chen
DOI:10.1080/00304940409458674
日期:2004.8
As part of a program for the total synthesis of pentacyclic alkaloids, we were interested in the 20(S)-camptothecin series, such as 20(S)-camptothecin (A), 20(S)-9-nitrocamptothecin (B) and 20(S)10-hydroxycamptothecin (C)I, in which the @ketophosphonate (8) had been established as a key intermediate in the synthesis of these compounds. Ciufolini and Roschanger obtained this compound from propionanilide
作为五环生物碱全合成计划的一部分,我们对 20(S)-喜树碱系列感兴趣,例如 20(S)-喜树碱 (A)、20(S)-9-硝基喜树碱 (B) 和20(S)10-羟基喜树碱 (C)I,其中 @ketophosphonate (8) 已被确定为合成这些化合物的关键中间体。Ciufolini 和 Roschanger 从丙酰苯胺中以 43% 的总收率获得了这种化合物?而 Boger 和 Hong 用邻氨基苯甲醛以 47% 的总产率制备了它。 3 虽然这两种产率都是