Summary The reaction of methylhydrazine with N-cyanoazomethines 1 containing a thioalkyl leaving group yields the 3-amino-l, 2, 4-triazole derivatives 2, whereas the N- cyanoazomethines 1 containing an alkoxy leaving group give the isomeric 5-amino-l, 2, 4- triazoles 3. The yields are excellent and the position selectivity is high. The structures of the 1, 2, 4-triazole derivatives were determined with the aid of proton-coupled 13C-NMR. ...
