THE REACTION OF THIAZOLO[3,2-b]PYRIDAZINIUM PERCHLORATES WITH HYDRAZINES. FORMATION OF 1,4-BIS-(2-VINYL-3-PYRIDAZINYLIDENE)TETRAZENES
Treatment of thiazolo[3,2-b]pyridazinium perchlorates with hydrazine hydrate in acetonitrile afforded the title compounds and several products depending upon its reaction time and temperature and difference of substituent. Catalytic reduction of the tetrazenes gave 2H-3,4-dihydropyridazino[6,1-c] triazines. Oxidation with 30% H2O2 yielded pyridazino[6,1-c]-3-triazinones.