Synthesis and crystal structure of 2-[1-phenyl-3-methyl-5-oxo-pyrazol-4-ylidene]-4-methyl-1,5-benzodiazepine

2820-2827A novel pyrazolopyrane 5, obtained from phenylhydrazone 4, in boiling acetic acid reacts with o-phenylenediamine to give new 1,5-benzodiazepine 6

Synthesis of new heterocycles containing pyrazole

2558-2562New heterocyclic systems derived from pyrazole associating different nuclei such as pyrimidobenzimidazole, pyrimidopyrimidine, thiazolopyrimidine and pyrazolylpyridone have been synthesized by the treatment of some bisnucleophiles with acetoacetylpyrazole resulting from dehydroacetic acid