Synthesis and biological activity of 1,2,4-triazinotriazinone derivatives.

The synthesis of 1,2,4-triazines bearing a 1,2,4-triazinone moiety and of 1,2,4-triazolo[4,3-b]-1,2,4-triazonones have been achieved by reaction of 1,6-dihydro-3-hydrazino-6-spiro- (9-fluorenyl)-1,2,4-triazin-5(4H)-one with various oxo- and halo-compounds. Structures of the products have been deduced by elemental analysis and spectral data. Significant anti-HIV and anticancer activities were observed in vitro for some members of the series.