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The aminomethyl-group of porphobilinogen reacted as an alkylating agent in alkaline solution with primary and secondary amines, amino alcohols, certain amino acids, and C-H acidic compounds. The uroporphyrinogen formation competed with these reactions. An elimination-addition mechanism is discussed. The possibility of this reaction acting a part in the biosynthesis of corrin ring formation is indicated.

Amin-Austausch und Kohlenstoff-Alkylierung / Amine-Exchange and Carbon-Alkylation