OXIDATIVE CYCLIZATION OF SUBSTITUTED N-VINYLPORPHYRIN COBALT COMPLEXES. SYNTHESIS OF N,N'-(1,2-VINYLIDENE) AND N,N'-(1,2-PHENYLENE)PORPHYRINS.

Article abstract of DOI:10.1016/S0040-4039(00)98297-2

The oxidative cyclization of substituted N-vinylporphyrin cobalt complexes gave N,N'-1,2-vinylidene porphyrins.In the case of a cyclic fragment further dehydrogenation gave a product similar to the 1,2-phenylene bridged porphyrin obtained on inactivation