Synthesis of Substituted 2-Benzoylaminothiobenzamides and Their Ring Closure to Substituted 2-Phenylquinazoline-4-thiones
作者:Jiří Hanusek、Ludmila Hejtmánková、Lenka Kubicová、Miloš Sedlák
DOI:10.3390/60400323
日期:——
Acylation of 2-aminothiobenzamide or 2-methylaminothiobenzamide with substituted benzoyl chlorides has been used to synthesise the corresponding 2-benzoyl-aminothiobenzamides whose subsequent sodium methoxide-catalysed ring closure gives the corresponding quinazoline-4-thiones. These compounds were characterised by means of their 1H- and 13C-NMR spectra. The preferred tautomeric form of selected compounds
2-氨基硫代苯甲酰胺或 2-甲氨基硫代苯甲酰胺与取代的苯甲酰氯的酰化已被用于合成相应的 2-苯甲酰基-氨基硫代苯甲酰胺,其随后的甲醇钠催化闭环得到相应的喹唑啉-4-硫酮。这些化合物通过它们的 1H-和 13C-NMR 谱进行表征。已根据它们的 13C-NMR、IR 和拉曼光谱讨论了所选化合物的优选互变异构形式。已经发现,在给定的介质中,1-甲基-喹唑啉-4-硫酮的硫取代基被氧取代,得到1-甲基-喹唑啉-4-酮。在强酸介质中,2-苯甲酰氨基硫代苯甲酰胺通过其硫原子环化得到2-苯基苯并[d-1,3]thiazin-4-one。