Regiospecific preparation of γ-carbolines andpyrimido[3, 4-a]indole derivatives by intramolecular ring-closure of heterocumulene-substituted indoles
作者:Pedro Molina、Julia´n Alca´ntara、Carmen Lo´pez-Leonardo
DOI:10.1016/0040-4020(96)00213-x
日期:1996.4
Compounds resulting from the aza-Wittig reaction of iminophosphorane derived from 2-(2-azidoethyl)indole and carbon disulfide, diphenylketene, aldehydes and acyl chlorides undergo ring-closure under acidic, basic and thermal conditions to give either dihydro γ-carbolines ordihydropyrimido[3, 4-a]indoles in a completely regiospecific fashion. The mode of cyclization strongly depends on the cyclizating
由2-(2-叠氮基乙基)吲哚和二硫化碳,二苯乙烯酮,醛和酰氯衍生的亚氨基磷杂环戊烷的aza-Wittig反应生成的化合物在酸性,碱性和热条件下进行闭环反应,得到二氢γ-咔唑或二氢嘧啶基[ 3,4-a]吲哚以完全区域特异性的方式存在。环化的方式在很大程度上取决于环化剂以及试剂的性质。相关的碳二亚胺9在酸性,碱性或热条件下进行区域特异性环化,生成二氢嘧啶基[3,4-a]吲哚。