Highly efficient one-pot, three-component synthesis of 1,5-benzodiazepine derivatives
作者:Xiao-Qing Li、Lan-Zhi Wang
DOI:10.1016/j.cclet.2013.11.035
日期:2014.2
mild and efficient protocol for the synthesis of ethyl 4-methyl-2-(thiophen)-2,5-dihydro-1,5-benzodiazepine-3-carboxylate is achieved for first time using H 3 PMo 12 O 40 in ethanol at 0 °C by a one-pot, three-component condensation of various thiophene aldehydes, substituted o -phenylenediamines and ethyl acetoacetate. Compared with the conventional synthesis method, this procedure has the advantages
摘要首次使用H 3 PMo 12 O 40首次获得了合成4-甲基-2-(噻吩)-2,5-二氢-1,5-苯并二氮杂-3-羧酸乙酯的通用,温和有效的方法在0°C的乙醇中,通过各种不同的噻吩醛,取代的邻苯二胺和乙酰乙酸乙酯的一锅,三组分缩合反应。与常规的合成方法相比,该方法具有操作方便,产率高和对环境无害的优点。已经提出了合理的形成机理。产品的结构通过1 H NMR,IR,MS和元素分析进行表征。