Abstract
AbstractMixed condensation of 3,3′‐diethyl‐4,4′‐dimethyl‐2,2′‐dipyrrolylmethane 1 with 4‐formylpyridine 2 and 4‐alkoxybenzaldehyde 3 in acid medium and subsequent oxidation of the reaction mixture with DDQ gives, among other compounds, title compound 5. An efficient methylation procedure of the pyridyl group in 5‐(4‐alkyoxyphenyl)‐15‐(4‐pyridyl)porphyrins is described. Mixed condensation of 1 with N‐methyl‐4‐formylpyridinium salt 9 and 3 yields among other compounds 5‐(4‐N‐methylpyridiniumiodide)porphyrin 10.
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