Synthesis and conversion of 2-(pyrazol-1-yl)quinoxaline 4-oxides

Article abstract of DOI:10.1002/jhet.5570370116

The reaction of 6-chloro-2-hydrazinoquinoxaline 4-oxide 1b with acetylacetone or benzoylacetone gave 6-chloro-2-(3,5-dimethylpyrazol-1- yl)quinoxaline 4-oxide 5a or 6-chloro-2-(3-methyl-5-phenylpyrazol-1- yl)quinoxaline 4-oxide 5b, respectively. Compound 5a or 5b was converted into the pyrrolo[1,5-a]quinoxaline 6a or 6b, triazolo[4,3-a]quinoxaline 9a or 9b, and tetrazolo[1,5-a]quinoxaline 10.