An inverted porphyrin with a pendant pyrrole—identification of a tetraphenylsapphyrin isomer in the Rothemund synthesis

2-Aza-3-(2′-pyrrolyl)-5,10,15,20-tetraphenyl-21-carbaporphyrin was identified among the products of a Rothemund synthesis and characterized. An alternative convenient method of its synthesis starting from 2-aza-5,10,15,20-tetraphenyl-21-carbaporphyrin was proposed.