Process for preparing phosphonomethylated amino acids

Details Process for preparing phosphonomethylated amino acids Process for preparing phosphonomethylated amino acids

1983-03-24

1984-07-03

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604655R, 260926, 260971, 560145, 560171, C07F 938

Patent

active

044578733

ABSTRACT:
A process for preparing phosphonomethylated amino acids comprising phosphonomethylating a N-carboxymethyl-S-methylene bisdithiocarbamate with formaldehyde and a phosphorus source to obtain a phosphonomethylated bisdithiocarbamate which is then hydrolyzed to the phosphonomethylated amino acid salt. Acidification yields the corresponding phosphonomethylated amino acid, e.g. glyphosate, or acid derivative.

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Franz, "Glyphosate and Related Chemistry", Adv. Pesticide Sci. Plenary Lect. Symp. Pap. Int. Congr. Pesticide Chem., 4th 1978 (pub. 1979), vol. 2, pp. 139-147.

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