Hydrochloric Acid → 5,15-Bis-(4-carboxyphenyl)-10,20-dihexyl-porphyrin

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Reaction Steps

In a typical experiment, a solution of KOH (200 mg, 3.6 mmol) in methanol (1 ml) was added to a stirred solution of 5,15-dihexyl-10,20-bis-(4-methoxycarbonylphenyl)-porphyrin (31 mg, 0.04 mmol) in THF (8 ml) and the reaction mixture was stirred for 2 d. Water (50 ml) and hydrochloric acid were then added until the pH was adjusted to 4-6. The aqueous layer was extracted with dichloromethane (2×100 ml) and the organic layer was separated, washed with water until neutral and dried over sodium sulfate. The solvent was evaporated and the title compound 5,15-bis-(4-carboxyphenyl)-10,20-dihexyl-porphyrin was obtained after recrystallization from dichloromethane/aqueous methanol (26 mg, 87%).

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