4.3 Article

Phosphorus pentachloride (PCl5) mediated synthesis of tetraarylporphyrins

Journal

HELVETICA CHIMICA ACTA
Volume 86, Issue 2, Pages 408-414

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/hlca.200390041

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A new synthesis of porphyrins from pyrrole and substituted benzaldehydes is described, with PCl5 as catalyst. Aromatic aldehydes condense irreversibly with pyrrole in the presence of this catalyst, and aerobic oxidation of porphyrinogen provides functionalized porphyrins in yields of 20-65%.

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