Oxidative cyclization of N-aroylhydrazones to 2-(2-arylethenyl)-1,3,4-oxadiazoles using DDQ as an efficient oxidant
作者:Karolina Jasiak、Agnieszka Kudelko
DOI:10.1016/j.tetlet.2015.09.018
日期:2015.10
A series of novel 5-aryl-2-(2-arylethenyl)-1,3,4-oxadiazoles were synthesized by the 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) promoted oxidative cyclization of N′-(arylmethylidene)-3-arylacrylohydrazides. A facile and efficient one-pot protocol using the starting 3-arylacrylohydrazides and aromatic aldehydes is also reported. Short reaction times, high yields, a simple work-up procedure and the possibility
通过2,3-二氯-5,6-二氰基苯并醌(DDQ)促进N '-(芳基亚甲基)的氧化环化反应合成了一系列新型的5-芳基-2-(2-芳基乙烯基)-1,3,4-恶二唑)-3-芳基丙烯酰肼。还报道了一种使用起始的3-芳基丙烯酰肼和芳族醛的简便有效的一锅操作方案。反应时间短,产率高,简单的后处理步骤以及氧化剂再生的可能性使所报道的方法成为合成2,5-二芳基-1,3,4-恶二唑的有前途的替代方法。