6-Acyl- (15, 17) and 6-ethoxycarbonyl-5-substituted 1,2,4-triazines (11) were prepared by refluxing acylhydrazones (10, 14) or N,N-dimethylaminomethylenehydrazones (16) with ammonium acetate in acetic acid. NMR-studies confirmed the high regio selectivity of this procedure.
6-Acyl- (15, 17) and 6-ethoxycarbonyl-5-substituted 1,2,4-triazines (11) were prepared by refluxing acylhydrazones (10, 14) or N,N-dimethylaminomethylenehydrazones (16) with ammonium acetate in acetic acid. NMR-studies confirmed the high regio selectivity of this procedure.