Aromatic aldehydes, including azulenecarbaldehydes, have been shown to react with an indene enamine derivative in the presence of dibutylboron triflate to give stable fulvene. aldehydes. 1,3-Azu lenedicarbaldehyde afforded a fulvene dialdehyde under these conditions, and this reacted with a dipyrrylmethane to give a 22-carbaazuliporphyrin. This adj -dicarbaporphyrinoid showed significant diatropic character, and protonation afforded an aromatic C-protonated dication.