Total synthesis of (±)-neoechinulin A, an indole alkaloid containing oxidized diketopiperazine
作者:Shin-ichi Nakatsuka、Hideki Miyazaki、Toshio Goto
DOI:10.1016/s0040-4039(00)78615-1
日期:1980.1
Protected neoechinulin A (Z isomer) and its E isomer were synthesized by condensation of N-bis(methylthiomethyl)cyclo(Ala-Gly) with 2-(1,1-dimethyl-2-propenyl)-1-methoxymethylindole-3-aldehyde; deprotection of both isomers gave neoechinulin A, whose Z configuration was rigorously established. A novel cyclization of the protected neoechinulin A into a seven-membered cyclic compound was reported.
通过N-双(甲硫基甲基)环(Ala-Gly)与2-(1,1-二甲基-2-丙烯基)-1-甲氧基甲基吲哚-3-醛的缩合反应合成被保护的新棘球蛋白A(Z异构体)及其E异构体; 两种异构体的脱保护得到新的神经弹性蛋白A,其新的Z构型被严格确立。据报道,将被保护的新棘球蛋白A新环化为七元环状化合物。