Process for the preparation of alpha -aminoalkylphosphonic acids

摘要

A process for the production of alpha -aminoalkylphosphonic acids or salts thereof of the formula A <IMAGE> (A) wherein R1 represents hydrogen, alkyl having from 1 to 4 carbon atoms or CH2-C6H5 and X hydrogen or a metal cation, which comprises reacting a compound of the formula B <IMAGE> (B) in which R1 has the same meaning as in formula A and Mp(+) represents hydrogen or a p-valent metal cation, with a hypohalite of a p-valent metal cation, and isolating the metal salt produced or acidifying the reaction mixture obtained to produce the alpha -aminoalkyl-phosphonic acid.