Useful Precursors for Synthesis of Some New Azolo[3,4-d]pyridiazines, Azolo[1,5-a]pyrimidines, Azolo[5,1-c]triazines, Pyrazoles, and Benzo[b][l,4]diazepine

Pyrazolo[3,4-d] pyridazines, isoxazolo[3,4-d] pyridazines, azolo[1,5-a]pyrimidines, azolo[5,1-c]triazines, pyrazoles, and benzo[b][l,4] diazepine were synthesized from the appropriate hydrazonoyl halides, hydroximoyl halides, heterocyclic amines, diazotized heterocyclic amines, arenediazonium chlorides, and o-phenylenediamines with appropriate of sodium 3-(5-bromobenzofuran-2-yl)-3-oxoprop-1-en-1-olate or 1-(5-bromobenzofuran-2-yl)-3-(dimethylamino)prop-2-en-1-one. The newly synthesized compounds were elucidated by elemental analyses, spectral data, and alternative synthesis whenever possible.