Process for the preparation of n-phosphonomethylglycine

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

C - Chemistry, Metallurgy

07

F

260/501.5

C07F 9/38 (2006.01)

Patent

CA 2006270

ABSTRACT A process for the preparation of N- phosphonomethylglycine isdisclosed which comprises: preparing an N-alkyl-N-phosphonomethylglyaine or its ester reprinted by the formula Image wherein R is an alkyl group represented by the formula Image and R1, R2 and R3 are independently selected from the group consisting of hydrogen and alkyl having one to about four carbon atoms, and R4, R5 and x6 are independently selected from substituted and unsubstituted alkyl groups having from one to about six carbon atoms wherein any substitution on the alkyl group has electron withdrawing properties, and hydrogen, provided that R4, R5 and R6 cannot all be hydrogen; and thereafter treating the N-alkyl-N-phosphonomethylglycine with an acid, other than a hydrohalic aaid, having a pR? value below about +3 in the presence of an organic acid to provide N- phosphonomethylglycine.

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