Fig. 1. (a) Typical synthetic approaches for constructing bipyrrole-containing porphyrinoids linked in different modes through oxidative coupling of oligopyrroles. (b) Representative macrocyclic compounds containing β,β′-linked (red) bipyrrole moieties. (c) The oxidative coupling reaction of a helical oligopyrrole, P8, where the appropriate pyrrole rings are present spatially in close proximity, giving a new isosmaragdyrin analogue 1. Meso-aryl rings are omitted for clarity.
