A new efficient synthetic process for the construction of the pentacyclic core of marine alkaloid ecteinascidins
作者:Ye-Feng Tang、Zhan-Zhu Liu、Shi-Zhi Chen
DOI:10.1016/s0040-4039(03)01785-4
日期:2003.9
The pentacyclic core of ecteinascidins was constructed from two fundamental building blocks, the 1,2,3,4-tetrahydroisoquinoline derivative and the substituted phenylalanine derivative, via 8 steps using readily available L-Dopa as starting material. The key steps involve coupling of the two aforementioned building blocks, regioselective reduction of the 11-carbonyl group of the key intermediate piperazine-1
ecteinascidins的五环核是由两个基本结构单元,即1,2,3,4-四氢异喹啉衍生物和取代的苯丙氨酸衍生物,通过8个步骤,使用容易获得的L-Dopa作为起始原料构建的。关键步骤涉及上述两个结构单元的偶联,关键中间体哌嗪-1,4-二酮衍生物的11-羰基的区域选择性还原以及分子内Pictet-Spengler环化。