Method for preparation of n-phosphonomethylglycine

Details Method for preparation of n-phosphonomethylglycine Method for preparation of n-phosphonomethylglycine

C - Chemistry, Metallurgy

07

F

260/501.5

C07F 9/38 (2006.01) C07F 9/40 (2006.01)

Patent

CA 1205487

METHOD FOR PREPARATION OF N-PHOSPHONOMETHYLGLYCINE Abstract of the Disclosure A method for the production of N-phosphonomethylglycine is dis- closed which comprises the steps of: (a) reacting formaldehyde with formamide at a pH of 9-10 to form N-(hydroxymethyl)formamide, (b) reacting N-(hydroxymethyl)formamide with triethylphosphite to form diethyl, N-(formyl)aminomethylphosphonate, (c) reacting diethyl, N-(formyl)aminomethylphosphonate with methylchloroacetate to form N-(diethylphosphonomethyl), N-(formyl)glycine- methyl ester, and (d) reacting N-(diethylphosphonomethyl), N-(formyl)glycine- methyl ester with hydrochloric acid to form N-phosphonomethylglycine.

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