Acid-catalyzed condensation of pyrrole and perfluoroalkyl aldehydes produced, in a single step, α,β-unsubstituted 5-perfluoroalkyldipyrromethanes, which were isolated and characterized for the first time. These dipyrromethanes were used as the key intermediates in the synthesis of trans-perfluroalkylporphyrins as well as meso-tetrakis(perfluoroalkyl)porphyrins. The two-step procedure described here provides access to a wide variety of porphyrins with trans perfluoroalkyl groups.
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Tilak P. Wijesekera (1996) studied this question.
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