Sm. Hassan, A FACILE SYNTHESIS OF NEW UNSYMMETRICAL AZINES BY CYCLODESULFURIZATION REACTIONS OF DITHIOESTERS WITH DIAMINES, Phosphorus, sulfur and silicon and the related elements, 92(1-4), 1994, pp. 213-217
Dithioesters 2a, b were prepared and methylated to give dimethyl thioe
sters 3a, b. Azines 4a-d and 5a, b were obtained in one step from 2 wi
th primary diamines or in two steps through 3. Dithioesters 2a, b reac
ted with amines in ethanol to produce thiosemicarbazones 6a, b and 8a-
d, while in butanol reacted with morpholine to form 7a, b.