Regiospecific Synthesis of 1-Substituted 1,2,4-Triazoles Involving Isomerization of the Corresponding 4-Substituted Compounds

Abstract
On heating with a catalytic quantity of the corresponding alkyl or phenacyl halides, 4-alkyl- or 4-phenacyl-1,2,4-triazoles isomerize via quaternary salts to their 1-substituted isomers. Thus, the 1-substituted compounds can now be obtained regiospecifically from 1,2,4-triazole by alkylation-isomerization.