New Method of 4,5-Disubstituted 1,2,4-triazolo-3-thiones Synthesis
摘要:
A universal method of 4,5-disubstituted S-triazolo-3-thiones synthesis from methyl esters of arylothiocarbazoic acids and some primary amines is presented.
series of newderivatives of 1,2,4-triazole-3-thiol. As starting materials methyl 3-acyldxithiocarbazates were used, which on reaction with amines gave the corresponding 4,5-disubstituted 1,2,4-triazole-3-thiol derivatives (3). Into the 4-position of the 1,2,4-triazole-3-thiol system a β-hydroxyethyl substituent was introduced (compounds 4). These compounds were alkylated with methyl iodide to from 6, with