A short synthesis of N (a)-methylervitsine. Reactivity of the intermediate 1,4-dihydropyridine towards electrophiles
作者:M. Lluisa Bennasar、Bernat Vidal、Joan Bosch
DOI:10.1039/c39950000125
日期:——
A four-step synthesis of N(a)-methylervitsine involving the nucleophilic addition of the enolate derived from acetylindole 2 to pyridinium salt 3, with subsequent C6H5SeBr-promoted cyclization of the resulting 1,4-dihydropyridine and further elaboration of the exocyclic 20E-ethylidene and 16-methylene substituents, is reported.
报告称,N(a)-methylvitsine的四步合成涉及从 acetylindole 2 衍生的核酸酸盐添加到 pyridinium 盐3中,随后由 C6H5SeBr 促进生成 1,4-dihydropyridine 的循环化,并进一步研制异循环的 20E-ethylidene 和 16-methylene 替代品。