2‐Aza‐3‐chloro‐2‐propeniminium salts 5, which are easily available by the addition of formamide chlorides 1 to nitriles 2 react smoothly with hydrazines 9 giving rise to 1,3‐disubstituted 1,2,4,‐triazoles 11. When the 2‐aza‐3‐chloro‐2‐propeniminium salts 5 are hydrolysed first the resulting N‐acyl‐formamidinium salts 6 react with hydrazines 9 to 1,5 disubstituted 1,2,4‐triazoles 13 via isolable N‐acyl‐formamidrazones 12.

ChemInform Abstract The butenones (I) are cyclized with cyanothioacetamide (II) to form the pyridinethiones (III). Especially derivative (IIIa) exhibits positive inotropic potency and vasodilatoric activity. (X-Ray data of (IIIa)).

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