Synthesis of pyrrolo[2,1-a]phthalazines by 1,3-dipolar cycloaddition of phthalazinium N-ylides with alkenes in the presence of tetrakis-pyridine cobalt (II) dichromate

Article abstract of DOI:10.1002/jhet.5570370524

We describe here, for the first time, that 1-cyano-3-benzoyl-1,2,3,10b-tetrahydropyrrolo[2,1-a]phthalazine (8), prepared by 1,3-dipolar cycloaddition of 2-phenacyl phthalazinium bromide (6a) with acrylonitrile (7a), can be aromatized by tetrakis-pyridine