Process for the preparation of N-phosphonomethylglycine

Details Process for the preparation of N-phosphonomethylglycine Process for the preparation of N-phosphonomethylglycine

1988-06-24

1989-07-11

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus acids or salts thereof

C07F 938

Patent

active

048470139

ABSTRACT:
The invention relates to a process for the preparation of N-phosphonomethylglycine of the formula I ##STR1## wherein a compound of the formula II or salts and esters thereof ##STR2## in which R.sub.1 and R.sub.2 denote hydroxyl or a hydrolyzable group and R.sub.3 denotes aryl, is reacted in a closed reaction vessel in the presence of a dehydrogenation catalyst and a hydrogenation catalyst with an alkali metal hydroxide or alkaline earth metal hydroxide in water as the solvent and, when the reaction has ended, a mineral acid is added to liberate N-phosponomethylglycine from its salt.

REFERENCES:
patent: 3956370 (1976-05-01), Parry et al.
patent: 4233056 (1980-11-01), Maier
patent: 4442041 (1984-04-01), Subramanian
patent: 4650613 (1987-03-01), Palmer et al.

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