Abstrakt: |
Diazo coupling of indazole-3-diazonium chloride with 1-(2,4-dinitrophenyl)-3,5-bis(dimethylamino)pyrazole, obtained from dimethylphosgeneimmonium chloride, and subsequent cyclization of the azo compound lead to the formation of the dimethylamino derivatives of a new polycyclic system — benzo[h]dipyrazolo[3,2-c:3',4'-e]-1,2,4-triazine. Previously unknown 3-dimethylamino derivatives of 1,2,4-triazolo-[3,4-b]benzothiazole were synthesized by reaction of dimethylphosgeneimmonium chloride with 2-hydrazinobenzothiazoles. |