An improved synthesis for 5,10,15,20‐tetrakis(pentafluorophenyl)porphyrin, 5,10,15,20–tetrakis(2,4,6‐trimethylphenyl)porphyrin and 5,10,15,20‐tetrakis(2,6‐dichlorophenyl)porphyrin by an acid‐catalysed condensation of pyrrole and properly substituted aldehyde, followed by oxidation, is reported, with yields of up to 30% being obtained.
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MADE et al. (1988) studied this question.
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