作者:Wei-Dong Z. Li、Yong-Qiang Wang
DOI:10.1021/ol035098b
日期:2003.8.1
[reaction: see text] Total synthesis of cephalotaxine (CET), the parent member of a class of structurally unique antileukemia Cephalotaxus alkaloids, was accomplished on the basis of a conceptually novel strategy featuring transannular reductive skeletal rearrangements as the key transformations for the construction of the pentacyclic ring skeleton of CET. The synthetic potential of the designated
[反应:见正文]在一种概念上新颖的策略基础上,完成了头孢他辛(CET)的全合成,头孢他辛是一类结构独特的头孢类生物碱的母体,该策略以跨环的还原性骨架重排为构建环戊二烯的关键转变。 CET的五环骨架。指定的Clemmensen-Clemo-Prelog-Leonard还原性重排的合成潜力首次在CET苯并enza庚因亚基的简便合成中得到了证明。发现了一种新型的环内烯胺(环戊烯酮)环化,并将其合理化为一种不寻常的偶氮-纳扎罗夫型环化反应。