作者:Konstantin F. Suzdalev、Natalia I. Vikrischuk、Kseniya A. Prikhodko、Elena Yu. Shasheva、Sergey V. Kurbatov、Saida K. Bogus、Pavel A. Galenko-Yaroshevsky
DOI:10.1007/s10593-016-1882-y
日期:2016.5
A two-step approach towards the synthesis of imidazo[1,2-a]indoles from 2-chloroindole-3-carbaldehyde has been developed. It comprises the N-alkylation of indole ring by 2-bromo-1,1-diethoxyethane followed by a treatment with aromatic amine hydrochlorides. The reaction proceeds as a nucleophilic substitution of the chlorine atom at position 2 of the indole ring followed by cyclization along with the
已经开发了一种由2-氯吲哚-3-甲醛 合成咪唑并[1,2- a ]吲哚的两步法。它包括2-溴-1,1-二乙氧基乙烷对吲哚环的N-烷基化,然后用芳族胺盐酸盐处理。反应以吲哚环第2位的氯原子的亲核取代进行,然后环化以及醛基缩合。分离出咪唑并[1,2- a ]吲哚为质子化的席夫碱。通过1 H和13 C NMR光谱以及X射线结构分析证明了它们的结构。