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US 2023/0271985 A1Published application
Preparation method for glufosinate
AssigneesLier Chemical Co., Ltd., Guangan Lier Chemical Co., Ltd
InventorsYongjiang LIU, Lei ZHOU, Wei ZENG, Min XU, Ke CHENG, Yingsui YIN
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Abstract
A preparation method for glufosinate ammonium or a salt thereof, an enantiomer thereof, or mixtures of the enantiomer thereof in all ratios, comprising reacting a compound of formula (II) or a salt, an enantiomer, or mixtures of the enantiomer in all ratios with one or more compounds of formula (III) or mixtures thereof.
Claims19
A mixture comprising:
- one or more compounds of formula (IV) and one or more compounds of formula (III);
- one or more compounds of formula (V) and one or more compounds of formula (III);
- or
- one or more compounds of formula (III), one or more compounds of formula (IV) and one or more compounds of formula (V),
- wherein:
- Hal2 is a halogen, and R2, R3 and R4 are each independently alkyl, phenyl or substituted phenyl, and when the mixture comprises one or more compounds of the formula (IV) and one or more compounds of the formula (III), or when the mixture comprises one or more compounds of the formula (III), one or more compounds of the formula (IV) and one or more compounds of the formula (V), R2 is either R3 or R4, provided that none of R2, R3 and R4 is methyl.
3 more elements
A mixture comprising:
- one or more compounds of the formula (IV) and one or more compounds of the formula (III), and a molar ratio of the compounds of formula (IV) to the compounds of the formula (III) is (0.9-1.1):1 or (0.05-1.1):1;
- or
- one or more compounds of the formula (V) and one or more compounds of the formula (III), and a molar ratio of the compounds of the formula (V) to the compounds of the formula (III) is (0.9-1.1):1 or (0.05-1.1):1;
- wherein:
- Hal2 is a halogen, and R2, R3 and R4 are each independently alkyl, phenyl or substituted phenyl, and when the mixture comprises one or more compounds of the formula (IV) and one or more compounds of the formula (III), or when the mixture comprises one or more compounds of the formula (III), one or more compounds of the formula (IV) and one or more compounds of the formula (V), R2 is either R3 or R4.
2 more elements
A method for the preparation of glufosinate or a salt thereof, or L-glufosinate or a salt thereof, wherein the method comprises a step of using a compound of formula (IIIa):
Dependencies are inferred from the claim text.