Efficient synthesis of symmetrical and unsymmetrical acyclic imides catalyzed by reusable 12-tungstophosphoric acid under thermal conditions and microwave irradiation
for the synthesis of symmetrical and unsymmetrical acyclic imides by the reaction of nitriles with acyclic anhydrides in the presence of catalytic amounts of 12-tungstophosphoric acid (H3PW12O40) under thermal conditions and microwaveirradiation. It was found that microwave improves the yields and significantly reduces the reaction times. Furthermore, the catalyst could be recovered and reused several
通过在热条件下和微波条件下,在催化量的12钨磷酸(H 3 PW 12 O 40)存在下,腈与无环酸酐反应,合成对称和不对称无环酰亚胺的方法已经开发出来,是一种有效且环保的方法。辐射。发现微波提高了产率并显着减少了反应时间。此外,催化剂可以被回收并重复使用几次而不会降低其活性。
US4218378A
申请人:——
公开号:US4218378A
公开(公告)日:1980-08-19
Ultrasound-assisted catalytic synthesis of acyclic imides in the presence of p-toluenesulfonic acid under solvent free conditions
A rapid and convenient preparation of acyclicimides by the reaction of aliphatic and aromatic nitriles with acyclic carboxylic anhydride in the presence of catalytic amounts of p-toluenesulfonic acid under thermal or ultra- sonic conditions is reported. The advantages of this procedure are moderate reaction times, good to excellent yields, and use of an inexpensive and eco- friendly catalyst. The