US2023271985A1PendingUtilityA1
Preparation method for glufosinate
Est. expiryJan 20, 2040(~13.5 yrs left)· nominal 20-yr term from priority
Y02P20/55C07F 9/5022C07F 9/301C07C 271/22C07F 9/30C07F 9/32C07F 9/4866C07F 9/52C07F 9/4891
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Claims
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.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . 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:
Hal 2 is a halogen, and R 2 , R 3 and R 4 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), R 2 is either R 3 or R 4 , provided that none of R 2 , R 3 and R 4 is methyl.
2 . The mixture according to claim 1 , wherein Hal 2 is a chlorine atom.
3 . The mixture according to claim 1 , wherein R 2 , R 3 and R 4 are each independently C 1 -C 6 alkyl, phenyl or substituted phenyl.
4 . The mixture according to claim 1 , wherein R 2 , R 3 and R 4 are each independently ethyl, propyl, 2-propyl, n-butyl, isobutyl, tert-butyl, pentyl, phenyl or substituted phenyl.
5 . The mixture according to claim 1 , wherein R 2 , R 3 and R 4 are each independently ethyl, propyl, 2-propyl, n-butyl, isobutyl, tert-butyl or pentyl.
6 . The mixture according to claim 1 , wherein R 2 , R 3 and R 4 are each independently ethyl.
7 . The mixture according to claim 1 , wherein the compound of the formula (IV) is diethyl methylphosphonite, and the compound of the formula (V) is dichloro(methyl)phosphane.
8 . 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:
Hal 2 is a halogen, and R 2 , R 3 and R 4 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), R 2 is either R 3 or R 4 .
9 . The mixture according to claim 8 , wherein Hal 2 is a chlorine atom.
10 . The mixture according to claim 8 , wherein R 2 , R 3 and R 4 are each independently C 1 -C 6 alkyl, phenyl or substituted phenyl.
11 . The mixture according to claim 8 , wherein R 2 , R 3 and R 4 are each independently ethyl, propyl, 2-propyl, n-butyl, isobutyl, tert-butyl, pentyl, phenyl or substituted phenyl.
12 . The mixture according to claim 8 , wherein R 2 , R 3 and R 4 are each independently ethyl, propyl, 2-propyl, n-butyl, isobutyl, tert-butyl or pentyl.
13 . The mixture according to claim 8 , wherein R 2 , R 3 and R 4 are each independently ethyl.
14 . The mixture according to claim 8 , wherein the compound of the formula (IV) is diethyl methylphosphonite, and the compound of the formula (V) is dichloro(methyl)phosphane.
15 . The mixture according to claim 8 , wherein the compound of the formula (IV) is diethyl methylphosphonite, and the compound of the formula (V) is dichloro(methyl)phosphane.
16 . 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 the compound of formula (III):
wherein Hal 2 and R 2 are as defined in claim 1 .
17 . 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):
18 . 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 the mixture according to claim 1 .
19 . 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 the mixture according to claim 8 .Join the waitlist — get patent alerts
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