tetrakis(4-carboxyphenyl)porphyrin Conditions ConditionsYield With propionic acid for 1.5h; Reflux; 14609-54-2 tetrakis(4-carboxyphenyl)porphyrin tetrakis(p-chloroformylphenyl)porphyrin Conditions ConditionsYield With oxalyl dichloride In dichloromethane for 1h; 100% With thionyl chloride for 10h...