An Efficient One-Pot Four-Component Synthesis of Functionalized Imidazo[1,2-<i>a</i>]pyridines
作者:Siyavash Kazemi Movahed、Minoo Dabiri、Ayoob Bazgir
DOI:10.1002/hlca.201200231
日期:2013.3
An efficient one‐pot four‐component protocol for the synthesis of imidazo[1,2‐a]pyridines was developed by condensing ethane‐1,2‐diamine (2), 1,1‐bis(methylthio)‐2‐nitroethene (1), aldehydes 3, and activated methylene compounds in EtOH under reflux conditions (Tables 1–3). The features of this procedure are operational simplicity, good yields of products, in situ preparation of heterocyclic ketene
用于合成咪唑并高效的一锅煮四组分协议[1,2一]吡啶通过冷凝乙烷-1,2-二胺(发达2),1,1-双(甲硫基)-2-硝基乙烯(1),乙醛3和活化亚甲基化合物在EtOH中回流条件下(表1-3)。该方法的特点是操作简便,产品收率高,原位制备杂环烯酮缩醛(HKA)和无催化剂条件。