Using Microwave and ultrasound to prepare of substituted Bis-acyl hydrazone Derivatives
作者:Salim J. Mohammed、Attallah M. Sheat、Salih A. Abood、Omar M. Yahya
DOI:10.21608/ejchem.2021.78532.3842
日期:2021.6.20
Abstract In this paper, some new bis-aryl hydrazone derivatives (4a-f) were prepared through the reaction of carboxylic acid hydrazides with 1,4-diacetylbenzene using classical methods, microwave and ultrasound irradiation methods. These compounds are obtained through a series of reactions where some carboxylic acids react with ethanol first in the presence of concentrated sulfuric acid to give the corresponding esters (2a-f), which when treatment with aqueous hydrazine give carboxylic acid hydrazides (3a-f).thus, The results proved that the use of microwave and ultrasound techniques is much better than the classical methods, as it gave a higher yield, shorter reaction time, and the absence of the use of solvents. All newly synthesized compounds were confirmed by IR, (1H & 13C) NMR spectral analysis and the corresponding reactions were monitored by TLC using the reported eluent
摘要 本文通过经典方法、微波和超声波辐射方法,利用羧酸酰肼与1,4-二乙酰基苯反应,制备了一些新的双芳基酰腙衍生物(4a-f)。这些化合物的制备过程包括一系列反应:首先,一些羧酸在浓硫酸存在下与乙醇反应生成相应的酯(2a-f),然后与水合肼处理生成羧酸酰肼(3a-f)。因此,实验结果证明,微波和超声波技术的使用效果远优于传统方法,因为它提供了更高的产率、更短的反应时间,并避免了溶剂的使用。所有新合成的化合物均通过IR、(1H与13C)NMR光谱分析进行了确认,相应的反应通过使用报道的洗脱剂的TLC进行了监控。