A straightforward, biomimetic synthesis of (−)-N(a)-methylervitsine involving the nucleophilic addition of the enolate derived from 2-acetylindole 1 to chiral, non-racemic pyridinium salt 2, followed by (Me2N+CH2) I– induced cyclization of the resultant 1,4-dihydropyridine, with subsequent elaboration of the exocyclic 16-methylene and 20E-ethylidene substituents, is reported.
                                    (−)-N(a)-methylervitsine 的直接仿生合成,包括将衍生自 2-乙酰
吲哚 1 的烯醇化物亲核加成到手性非外消旋
吡啶盐 2,然后是 (Me2N+
CH2) I– 诱导的环化报道了生成的 1,4-
二氢吡啶,随后对环外 16-亚甲基和 20E-亚乙基取代基进行了详细说明。