One-pot synthesis of 1,3,4-thiadiazoles using Vilsmeier reagent as a versatile cyclodehydration agent
作者:Maaroof Zarei
DOI:10.1016/j.tet.2017.02.042
日期:2017.4
A simple and efficient synthetic method for the one-pot synthesis of 1,3,4-thiadiazoles utilizing Vilsmeier reagent was developed. In this method carboxylic acids and hydrazine were converted to 1,3,4-thiadiazoles in the presence of Vilsmeier reagent and Lawesson's reagent. The influence of the thionation reagent, solvent, temperature and time, in this reaction was discussed. The developed methodology
开发了一种简单有效的利用维尔斯迈尔试剂一锅法合成1,3,4-噻二唑的合成方法。在这种方法中,在Vilsmeier试剂和Lawesson试剂存在下,将羧酸和肼转化为1,3,4-噻二唑。讨论了该反应中硫磺化试剂,溶剂,温度和时间的影响。用于1,3,4-噻二唑合成的开发方法具有简单,环境反应条件,易于纯化以及产物收率良好至优异的优点。