SCHEDULED MAINTENANCE
Direct meso-alkylation of zinc(II) or metal-free 5-formyloctaethylporphyrin is achieved by use of Grignard reagents (such as MeMgBr, EtMgBr and PhCH2MgCl); regioselective attack at the 15-position of the prophyrin macrocycle is observed and affords the unexpected 5-formyl-15-alkylporphyrins by way of a phlorin intermediate.
X. Jiang, D. J. Nurco and K. M. Smith, Chem. Commun., 1996, 1759 DOI: 10.1039/CC9960001759
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