Process for the preparation of N-phosphonomethyl-glycine

Details Process for the preparation of N-phosphonomethyl-glycine Process for the preparation of N-phosphonomethyl-glycine

1977-01-12

1977-12-27

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260534M, C07F 938

Patent

active

040654915

ABSTRACT:
The invention relates to a new and improved method for the preparation of N-phosphonomethyl-glycine, a potent pre-emergence herbicide. According to the invention glycine, formaldehyde and a dialkyl phosphite are condensed in an aqueous alkaline medium to form a N-phosphonomethyl-glycine dialkyl ester, and the diester is hydrolyzed with a mineral acid.

REFERENCES:
patent: 2635112 (1953-04-01), Fields
patent: 2847442 (1958-08-01), Sellman
patent: 3288846 (1966-11-01), Irani et al.
patent: 3298956 (1967-01-01), Irani et al.
patent: 3480594 (1969-11-01), Price
Walker, "Formaldehyde", 1944, p. 199.

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