Divergent Total Synthesis of Triptolide, Triptonide, Tripdiolide, 16-Hydroxytriptolide, and Their Analogues
作者:Hongtao Xu、Huanyu Tang、Huijin Feng、Yuanchao Li
DOI:10.1021/jo501744j
日期:2014.11.7
for the formal total synthesis of triptolide, triptonide, and tripdiolide, as well as a total synthesis of 16-hydroxytriptolide and their analogues in an enantioselective form. Common advanced intermediate 5 was concisely assembled by employing an indium(III)-catalyzed cationic polycyclization reaction and a palladium-catalyzed carbonylation–lactone formation reaction as key steps. This advanced intermediate
为雷公藤内酯醇,雷公藤内酯和雷公藤内酯的正式全合成以及对映选择性形式的16-羟基雷公藤内酯及其类似物的全合成开发了一条分歧的路线。通过采用铟(III)催化的阳离子多环化反应和钯催化的羰基化-内酯形成反应作为关键步骤,可以简洁地组装常用的高级中间体5。通过使用钯催化的交叉偶联或克莱森重排反应作为关键步骤,可以将该高级中间体轻松转化为上述天然产物。此外,对C13的初步结构与细胞毒性活性之间的关系研究表明,它可能是一个新的修饰位点,仍然可以保留细胞毒性。