| 摘要 |
A process for the preparation of N-phosphonomethylglycine characterised in that it comprises:… (a) reacting 1,3,5-tricyanomethylhexahydro-1,3,5-triazine with an acyl chloride corresponding to the following general formula: ……R-@-X… wherein X represents chlorine, bromine or iodine; and R represents an aliphatic or aromatic group; to form the N-cyanomethyl-N-chloromethyl amide of the acyl chloride corresponding to the following general formula: …<CHEM>… wherein X and R are as defined above;… (b) reacting the amide formed in (a) with a phosphite corresponding to the following general formula: …<CHEM>… wherein R<1> and R<2> represent both aromatic groups or both aliphatic groups; and R<3> represents an aliphatic group or an alkali metal; to form a phosphonate corresponding to the following general formula …<CHEM>… wherein R<1> and R<2> are as defined above; and… (c) hydrolyzing the phosphonate formed in (b) to yield N-phosphonomethylglycine is disclosed. …<??>Thus, an improved production for a valuable herbicide is provided. |
