作者:M.-Lluïsa Bennasar、Juan-Miguel Jiménez、Bilal A. Sufi、Joan Bosch
DOI:10.1016/s0040-4039(96)02097-7
日期:1996.12
A stereocontrolled synthesis of (±)-geissoschizine, involving the addition of the enolate derived from 1-acetylindole to pyridinium salt 2, cyclization of the resultant 1,4-dihydropyridine, stereoselective elaboration of the E-ethylidene substituent, closure of C ring by Pummerer reaction, and methanolysis of the resulting pentacyclic lactam, is reported.
(±)-geissoschizine的立体控制合成,包括在吡啶鎓盐2中添加衍生自1-乙酰吲哚的烯醇盐,环合的1,4-二氢吡啶,E-亚乙基取代基的立体选择性修饰,C环的封闭据报道有Pummerer反应和所得五环内酰胺的甲醇分解。