A facile and efficient addition reaction of nitrogen-containing heterocyclic compounds with DMAD under neat conditions
作者:Hassan Valizadeh、Ashkan Shomali、Hamid Gholipour
DOI:10.1002/jhet.763
日期:2011.11
A simple and efficient method was developed for the reaction of dimethyl acetylenedicarboxylate with benzothiazole, isoquinoline, quinoline, 3‐bromopyridine, pyridine, benzoxazole, benzimidazole, and 5,6‐dimethyl benzimidazole for the high‐yield synthesis of the related heterocyclic products (1, 2, 3, 4, 5, 6, 7, 8) in very short reaction time under neat procedure. The reaction of isoquinoline, 3‐bromopyridine
开发了一种简单高效的方法,将乙炔二甲酸二甲酯与苯并噻唑,异喹啉,喹啉,3-溴吡啶,吡啶,苯并恶唑,苯并咪唑和5,6-二甲基苯并咪唑反应,以高产率合成相关的杂环产物(1,2,3,4,5,6,7,8)的下纯过程非常短的反应时间。异喹啉,3-溴吡啶,和吡啶的反应,得到以产品对映异构混合物2,4,和5分别。但是,产品1只有一种异构体,3,6,7,和8是从苯并噻唑,喹啉,苯并恶唑,苯并咪唑,和5,6-二甲基苯并咪唑,分别的反应鉴定。在这些条件下,苯并三唑得到产物9。为了比较,在不同的反应介质中和/或在微波辐射下检查反应。J.杂环化学。(2011)。