申请人:STAUFFER CHEMICAL COMPANY
公开号:EP0097522A2
公开(公告)日:1984-01-04
A process for the preparation of N-phosphonomethyt- glycine 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:
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:
wherein X and R are as defined above;
(b) reacting the amide formed in (a) with a phosphite corresponding to the following general formuia:
wherein R1 and R2 represent both aromatic groups or both aliphatic groups; and R3 represents an aliphatic group or an alkali metal; to form a phosphonate corresponding to the following general formula
wherein R' and R2 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.
一种制备 N-膦酰甲基甘氨酸的工艺,其特征在于包括
(a) 将 1,3,5-三氰基甲基六氢-1,3,5-三嗪与对应于下通式的酰基氯反应:
其中 X 代表氯、溴或碘;R 代表脂肪族或芳香族基团;形成对应于下 列通式的酰基氯的 N-氰甲基-N-氯甲基酰胺:
其中 X 和 R 如上定义;
(b) 将(a)中形成的酰胺与对应于以下通式的亚磷酸酯反应:
其中 R1 和 R2 同时代表芳香族基团或脂肪族基团;R3 代表脂肪族基团或碱金属;形成对应于下式的膦酸盐
其中 R' 和 R2 如上定义;以及
(c) 将(b)中形成的膦酸盐水解,生成 N-膦酰甲基甘氨酸。
因此,本发明提供了一种有价值的除草剂的改进生产方法。