Method for preparation of N-phosphonomethylglycine

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

1982-08-16

1984-01-31

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

560155, C07F 938

Patent

active

044288883

ABSTRACT:
Disclosed is a method for the preparation of N-phosphonomethylglycine which comprises the steps of (1) reacting 1,3,5-tris(alkoxy- or aryloxy-substituted carbonylmethyl) hexahydro-s-triazine, with a substituted phosphorus compound having the formula PXYZ wherein X is a halogen, Y and Z are independently selected from the group consisting of halogen, alkoxy having from 1 to 10 carbon atoms, and aryloxy, in the presence of a protic acid and a low molecular weight carboxylic acid; (2) heating said reactants to a temperature ranging from about 10.degree. to about 25.degree. C. for a sufficient period of time to cause the formation of an N-phosphonomethylglycine ester,; and (3) hydrolyzing said phosphonomethylglycine ester to N-phosphonomethylglycine.

REFERENCES:
patent: 2847442 (1958-08-01), Sallmann
patent: 3288846 (1966-11-01), Irani et al.
patent: 3366677 (1968-01-01), Quimby
patent: 3547728 (1970-12-01), Balde et al.
patent: 4053505 (1977-10-01), Dutra
patent: 4235809 (1980-11-01), Redmore

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