作者:Vipin Nair、Varun Kumar、Gopal Khatik、Anang Pal、Mohan Praneeth、Sanjay Bhattarai
DOI:10.1055/s-0032-1317133
日期:——
A highly efficient procedure was devised for the synthesis of 3-(3-arylthioureido)propanoic/butanoic acid and its cyclization to (3-aryl/3-aryl-6-methyl)-2-thioxotetrahydropyrimidin-4(1H)-one derivatives. Carbonyl diimidazole proved to be a very effective coupling reagent for the cyclization. Studies carried out to examine the ambident nature of the thioamide moiety towards substitution reactions demonstrated the preference for alkylation at sulfur, and acylation and 1,4-addition at nitrogen.