Method for preparation of n-phosphonomethylglycine

Details Method for preparation of n-phosphonomethylglycine Method for preparation of n-phosphonomethylglycine

C - Chemistry, Metallurgy

07

F

260/501.5

C07F 9/38 (2006.01) C07F 9/6509 (2006.01)

Patent

CA 1205486

METHOD FOR PREPARATION OF N-PHOSPHONOMETHYLGLYCINE Abstract of the Invention A method for the production of N-phosphonomethylglycine is dis- closed which comprises the steps of: (1) first reacting 2,5-diketopiperazine with p-formaldehyde, then adding substituted phosphorus compound, all in the presence of a low molecular weight carboxylic acid solvent, to form an intermediate bis- phosphonomethyl-2,5-diketopiperazine compound, (2) isolating said intermediate compound, (3) subsequently reacting said intermediate bis-phosphono- methyl-2,5-diketopiperazine compound with a hydrolyzing agent; and, (4) thereafter acidifying said reactants with a mineral acid to form the end product, N-phosphonomethylglycine.

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