1.2.4- Triazolo quinazoline-2-thiones

Synthesis of 9-substituted tetrahydroazepinopurines as asmarine analogs has been described <03T6493>. In relation to adenosine receptor antagonists, new derivatives of pyrazolo[4,3-c][l,2,4]triazolo[l,5-c]pyrimidines have been synthesized <03IMC1229, 4287>. A one-pot synthesis of l,2,4-triazolo[l,5-c]quinazoline thiones 65, consisting of a domino cyclization of 2-isothiocyanatobenzonitrile 63 with hydrazides 64 has been published <03EJO182>. 

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