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Three kinds of fused porphyrinoids, L2–L4, possessing different types of corrole‐based frameworks were synthesized from a pyrrole‐substituted corrole isomer (norrole L1). Oxidation of L1 afforded a unique N‐Cmeso‐fused pyrrolyl isonorrole L2, involving the fusion of an auxiliary pyrrolic NH moiety with a meso‐sp3‐hybridized carbon atom. Subsequently, L2 underwent macrocycle transformations to give...
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