Method for preparation of N-phosphonomethylglycine

Details Method for preparation of N-phosphonomethylglycine Method for preparation of N-phosphonomethylglycine

1983-11-21

1984-12-11

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260940, 260941, C07F 938

Patent

active

044877242

ABSTRACT:
A method for preparing N-phosphonomethylglycine comprising (a) O,O-dialkylaminomethylphosphonate with formaldehyde to produce a triazine; (b) reacting the triazine formed in step (a) with an acyl halide to form the O,O-dialkyl-N-phosphonomethyl-N-chloromethyl acetamide of the acyl halide; (c) reacting the amide formed in step (b) with metal cyanide to form O,O-dialkyl-N-cyanomethyl-N-acetamide; and (d) hydrolyzing the acetamide formed in step (c) to yield N-phosphonomethylglycine.

REFERENCES:
patent: 3923877 (1975-12-01), Barton
patent: 4053505 (1977-10-01), Dutra
patent: 4425283 (1984-01-01), Felix
patent: 4425284 (1984-01-01), Felix
patent: 4427599 (1984-01-01), Felix
patent: 4444693 (1984-04-01), Felix

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