A simple and elegant method for the synthesis of 1,5-benzothiazepines has been developed using di-cationic liquid as a solvent cum catalyst by the reaction of o-aminothiophenol with a variety of chalcones under mild reaction conditions. Furthermore the reusability of the catalyst has also been studied for three cycles. All the reactions are proposed to proceed through a 1,4-conjugate Michael addition followed by a cyclo-condensation reaction.
一种简单优雅的方法已被开发用于合成1,5-苯并
噻嗪,采用双阳
离子液体作为溶剂和催化剂,通过在温和反应条件下使邻
氨基
硫醇与多种
查尔酮反应。此外,还研究了催化剂的重复使用性,进行了三轮实验。所有反应被提出是通过1,4-共轭迈克尔加成反应,然后进行环状缩合反应。