Direct Arylation of meso-Formyl Porphyrin

[摘要]：Palladium-catalyzed direct arylation of meso-formyl Ni-II porphyrin with aryl bromides provided beta-monoarylated meso-formyl porphyrins. In spite of the existence of the meso-formyl group, the reactions proceeded regioselectively at the beta-position adjacent to the formyl group. beta-Arylated formyl porphyrin was converted to a tetraline-fused porphyrin by reduction and subsequent acid-catalyzed cyclization and to a meso--meso vinylene-bridged diporphyrin by McMurry coupling (see scheme).

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