发明名称 |
Verfahren zur Herstellung von N-Phosphonomethylglycinestern |
摘要 |
Disclosed is a technically simple method of preparing, in very good yields, highly pure N-phosphonomethylglycine esters, having a herbidical action, of formula (I) (HO)2P(O)-CH2-NH-CH2-CO-O-R, in which R is alkyl, by reacting N-phosphonomethylglycine formula (II) (HO)2P(O)-CH2-NH-CH2-COOH with alcohols of general formula (III) HO-R at temperatures between 40 and 150 DEG C in the presence of an acid (1st stage) and then reacting, at temperatures between 0 and 60 DEG C, the acid adducts of the compounds of formula (I), optionally after isolating them, with an oxiran (epoxide) used as an acid binder (2nd stage).
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申请公布号 |
DE19528054(A1) |
申请公布日期 |
1997.02.06 |
申请号 |
DE19951028054 |
申请日期 |
1995.07.31 |
申请人 |
BAYER AG, 51373 LEVERKUSEN, DE |
发明人 |
RIEBEL, HANS-JOCHEM, DR.-CHEM., 42113 WUPPERTAL, DE |
分类号 |
C07F9/38;(IPC1-7):C07F9/40;A01N57/20 |
主分类号 |
C07F9/38 |
代理机构 |
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