The efficient o-benzenedisulfonimide catalysed synthesis of benzothiazoles, benzoxazoles and benzimidazoles
作者:Margherita Barbero、Silvano Cadamuro、Stefano Dughera
DOI:10.3998/ark.5550190.0013.923
日期:——
o-Benzenedisulfonimide has been used to efficiently catalyse the reaction between 2-aminothiophenol, 2-aminophenol, o-phenylenediamine and various ortho esters (28 examples; average yield 90%) or aldehydes (17 examples; average yield 72%) giving the corresponding benzofused azoles in excellent yields. Reaction conditions were very simple. In addition, other carboxylic acid derivatives have been tested
邻苯二磺酰亚胺已被用于有效催化 2-氨基苯硫酚、2-氨基苯酚、邻苯二胺与各种原酸酯(28 个例子;平均收率 90%)或醛(17 个例子;平均收率 72%)之间的反应,得到相应的苯并稠合唑以优异的收率。反应条件非常简单。此外,还测试了其他羧酸衍生物并给出了良好的结果。催化剂很容易回收和再利用。