developed for the one-pot solvent-free synthesis of 4-substituted-1,5-benzodiazepines via three-component reaction of o-phenylenediamine, dimedone with a variety of aldehydes catalyzed by sulfated polyborate. The major advantages of the present method are good to excellent yields, shorter reaction time, simple experimental procedure, easy workup, solvent-free reaction condition, recyclability of the
通过
邻苯二胺,
二甲酮与
硫酸化多
硼酸酯催化的各种醛的三组分反应,开发了一种高效,环保的方法,用于一锅无溶剂合成4-取代的1,5-苯并二氮杂s。本方法的主要优点是优良的收率,较短的反应时间,简单的实验步骤,容易的后处理,无溶剂的反应条件,催化剂的可回收性以及耐受各种官能团的能力,这使得经济且生态奖励。