Enantiospecific Synthesis of Optically Active 6-Methoxytryptophan Derivatives and Total Synthesis of Tryprostatin A<sup>1</sup>
作者:Tong Gan、Ruiyan Liu、Peng Yu、Shuo Zhao、James M. Cook
DOI:10.1021/jo971640w
日期:1997.12.1
A concise preparation of optically active L or D-6-methoxytryptophan ethyl ester 21 was developed via the Fischer indole/Schollkopf protocol from 6-methoxy-3-methylindole 16 (four steps, 58% overall yield). This method was extended to the enantiospecific total synthesis of tryprostatin A (11) via a regiospecific bromination process as a key step. In addition, 6-methoxy-2-bromotryptophan ethyl ester (32), a potential intermediate for indole alkaloid synthesis, was prepared via this strategy.