ChemInform Abstract: Activated Nitriles in Heterocyclic Synthesis. Part 4. Reactions with 1‐Ethoxycarbonyl‐4‐cyanoacetylthiosemicarbazide. Synthesis of Functionalized Pyridinone and 1,3,4‐Thiadiazole Derivatives.

Abstract

The reaction of the thiosemicarbazide (I) with the dinitriles (II) gives the pyridones (III) whereas the reaction of (I) with the dinitriles (IV) produces the thiadiazoles (VI) via the intermediates (V).