A number of condensed quinazolines have been synthesized by the reacti
on of 5-phenyl-3-hydrazino-1,2,4-triazolo [4,3-c]quinazoline with appr
opriate phenyl isothiocyanates, arylcarbaldehydes, ethyl orthoformate,
acetic anhydride, and nitrous acid. The IR and H-1 NMR spectra of the
products are presented.