N-phosphonomethyl glycine prepn - by electrolytic oxidn of an N-organo-N-phosphonomethylamino acetic acid

摘要

N-phosphonomethyl glycines of formula: (where M, M1 and M2 may each be H, 1-18C alkoxyalkyl, 1-18C alkyl, alkali(ne earth) metal or (org. substd.) ammonium, with the proviso that is not 1 thereof is H or alkali(ne earth) metal), are made by oxidising an N-organo-N-phosphonomethylaminoacetic acid of formula: (where R may be (halo substd) alkyl, (halo substd) benzyl, 2,2,2-triphenyethyl-, diphenyl-methyl-, 1,2- ro 2,2-diphenylethyl-, CH2CH2OH, -CH2NO2, -CH2CN, -CH2COCnH2n+1, -CH2-CH2OR', -CH2Cl, -CH2CHO, -CH2CH2NR'R", -CH2OR', -CH2CCl3, -CH2CO-NR'R", -CH2-CO2M3 and/or -CH2P(O)OM3; R' being 1-6C alkyl, R" being H or R', n being 1-6 and M3 and M4 having the same significance as M1 and M2), in an aqs. electrolytic medium.