Sterically hindered porphyrins with four bulky aryl groups in the β-positions are prepared by the reduction of ethyl 3-aryl-4-alkylpyrrole-2-carboxylate with LiAIH4 followed by treatment with an acid and an oxidizing agent.
N. Ono, H. Kawamura, M. Bougauchi and K. Maruyama, J. Chem. Soc., Chem. Commun., 1989, 1580 DOI: 10.1039/C39890001580
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