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US 6,660,878 B2Granted
Process for the preparation of N-phosphonomethylglycine
AssigneeBASF SE
InventorsChristian Wulff, Stefan Orsten, Alfred Oftring
Life of this patent
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Abstract
The present invention relates to a process for the preparation of N-phosphonomethylglycine by reacting a hexahydrotriazine derivative with a triacyl phosphite. The process gives N-phosphonomethylglycine in high yield and in a simple and inexpensive manner.
Claims4
A phosphono compound of the formula I
- in which the radicals R3, which can be identical or different, are C1-C18-alkyl or aryl which is unsubstituted or substituted by C1-C4-alkyl, NO2 or OC1-C4-alkyl, and
- X is CN, COOZ, CONR1R2 or CH2OY,
- Y is H or a radical which is readily exchangeable for H;
- Z is H, an alkali metal, alkaline earth metal, C1-C18-alkyl or aryl, which is unsubstituted or substituted by C1-C4-alkyl, NO2 or OC1-C4-alkyl;
- R1 and R2, which can be identical or different, are H or C1-C4-alkyl, or a salt thereof.
2 more elements
Dependencies are inferred from the claim text.