Microwave irradiation of a mixture of benzylidene-anilines and mercaptoacetic acid in benzene gives 1,3-thiazolidin-4-ones in very high yield (65–90%), whereas the same reaction performed through using the conventional method, at reflux temperature, requires a much longer time and gives a much lower yield (25–69%). This difference seems to be due to some intermediates and by-products formed during the conventional reaction. On the basis of 1H NMR studies, two different mechanisms, acting in benzene and in DMF, respectively, have been hypothesized for the thiazolidin-4-one system formation.
在苯中对苄叉
苯胺和
巯基乙酸的混合物进行微波辐射,可以高产率(65-90%)合成1,3-
噻唑烷-4-酮,而采用传统方法在回流温度下进行相同反应,则需要更长的时间并且产率较低(25-69%)。这种差异似乎是由于传统反应过程中产生了一些中间体和副产物。基于1H NMR研究,假设在苯和
DMF中分别存在两种不同的机制,促成
噻唑烷-4-酮体系的形成。