Synthesis of some new N-substituted pyrroles, pyrrolo[1,2-a]quinazoline, and diaza-as-indacene derivatives

2-Phenyl-1,1,3-tricyano-3-bromopropene 1 reacts with the aromatic amines 2a-f and 6a-c to afford the N-substituted pyrroles 4a-d, the pyrrolo[1,2-a]quinazoline derivatives 5a, b, and the diaza- as -indacene derivatives 7a-c and 8a-c, presumably via elimination of hydrogen bromide followed by cyclization of the formed acyclic intermediates. All structures are confirmed by analytical and spectral data.