发明授权
US4065491A Process for the preparation of N-phosphonomethyl-glycine 失效
制备N-膦酰基甲基甘氨酸的方法

Process for the preparation of N-phosphonomethyl-glycine
摘要:
The invention relates to a new and improved method for the preparation of N-phosphonomethyl-glycine, a potent pre-emergence herbicide. According to the invention glycine, formaldehyde and a dialkyl phosphite are condensed in an aqueous alkaline medium to form a N-phosphonomethyl-glycine dialkyl ester, and the diester is hydrolyzed with a mineral acid.
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