Herbicidally active monoesters and diesters of n-alkyl substituted amino methyl phosphonic acid and process for preparing same

摘要

Monoesters and diesters of N-alkyl-substituted amino methyl phosphonic acid of the formula CHEM wherein a + b = 2 and a is 0 or 1, Z, R and R1 have various values, representative compounds being the ethyl, 2-chloroethyl, 2-ethoxyethyl and pentyl esters of N[(1-cyanoethoxy)hydroxyphosphinyl]methylglycine, are made by reacting a phosphite of the formula P(OR1)3, water and a trisubstituted hexahydro1,3,5-triazine of the formula CHEM Compounds of formula I are useful as herbicides.