N-Fused [22]pentaphyrin(1.1.1.1.1) transformed into recombined N-fused pentaphyrin bromide after treatment with N-bromosuccinimide. This bromide was highly reactive to nucleophiles to give the corresponding substituted products including aminated, oxidized, and unsubstituted derivatives.

We report synthesis and coordination properties of β-alkyl porphyrin derivatives bearing terpyridylphenyl substituents at the meso-position and propionate side chains at the β-positions. Rhenium(I) carbonyl ion was encapsulated not in the core but in the external terpyridyl ligand. Such porphyrin–terpyridine hybrid porphyrins can be potentially available for less-invasive imaging like SPECT.