Synthesis of 1,3,5-trisubstituted-1,2,4-triazoles by microwave-assisted N-acylation of amide derivatives and the consecutive reaction with hydrazine hydrochlorides
作者:Jongbok Lee、Myengchan Hong、Yoonchul Jung、Eun Jin Cho、Hakjune Rhee
DOI:10.1016/j.tet.2012.01.003
日期:2012.2
Facile and efficient procedures for the N-acylation reaction of amide derivatives with various acid anhydrides and the cyclization reaction of N-acylated amide derivatives with various hydrazinehydrochlorides were described. The reactions were carried out under microwave irradiation to give products in good yields in a few minutes. The synthesis of 1,3,5-trisubstituted-1,2,4-triazoles from benzamides
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
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。
Reaction of N-acetylbenzamides with hydroxylamine hydrochloride: synthesis of 3-methyl-5-aryl-1,2,4-oxadiazoles
作者:Nevin Arıkan Ölmez
DOI:10.1007/s00706-022-02975-z
日期:2022.10
A convenient reaction between N-acetylbenzamides and hydroxylamine hydrochloride at 80 °C in the presence of pyridine under microwave irradiation was described. This method leads to the formation of 3-methyl-5-aryl-1,2,4-oxadiazole compounds as regioselective in moderate to good yields and also employs simple synthetic protocols devoid of lengthy purification procedures. The reaction was also carried
描述了N-乙酰苯甲酰胺和盐酸羟胺在 80 °C 下在吡啶存在下在微波照射下的方便反应。该方法以中等至良好的收率形成区域选择性的 3-甲基-5-芳基-1,2,4-恶二唑化合物,并且还采用简单的合成方案,无需冗长的纯化程序。该反应还通过常规加热和微波照射下的一锅顺序进行。合成化合物的结构通过光谱方法进行了确认。 图形概要
Rayet, Industrie Chimique Belge, 1952, vol. 17, p. 478