A new and convenient method was found for the one-pot synthesis of symmetrical and unsymmetrical linear imides by -reaction of aliphatic and aromatic nitriles with acyclic carboxylic anhydrides in the presence of silica sulfuric acid as an active and -recyclable reagent.
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。
Heterocyclic synthesis with 4-hydrazinopyridothienopyrimidines: Synthesis of pyridothienotriazolopyrimidines and heterocyclylpyridothienopyrimidines with biological interest
作者:Hatem M. Gaber、Galal E. H. Elgemeie、Salama A. Ouf、Sherif M. Sherif
DOI:10.1002/hc.20126
日期:——
Synthesis of the new 4-hydrazinopyrido[3′,2′:4,5]thieno[3,2-d]pyrimidines 7a,b was reported. Their reactivity toward a variety of carbon electrophiles and active methylene reagents was studied to give pyridothienotraizolopyrimidines as well as other substituted phthalazinyl- and pyrazolyl-pyridothienopyrimidine derivatives. The antimicrobial activity of some newly synthesized compounds was evaluated