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US 2026/0184673 A1Published application
A process for preparation of an intermediate useful for producing glufosinate or isomer or its salts
AssigneeUpl Ltd
InventorsPrashant Vasant Kini, Chandrasekhar Dayal Mudaliar, Ashishkumar Ravindra Mishra, Shivaji Vithoba Patil
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Abstract
The present invention relates to a process preparation of a compound of formula (I) O O NHZ R 2 R 1 Formula (I) wherein, R1 is amino protecting group, R2 is carboxylic acid protecting group; and 5 Z is halogen or hydroxy group 10
Claims19
A process for preparation of a compound of formula (I)
- wherein, R1 is an amino protecting group, R2 is a carboxylic acid protecting group;
- and Z is halogen or a hydroxy group;
- the process comprising converting L-homoserine lactone of formula (IV) or its salt, to compound of formula (I):
- wherein the compound of formula (IV) is substantially free of a compound of formula (V):
- wherein:
- R is hydrogen, alkyl, aryl, acyl, alkylsulfonate esters, alkylnitrate ester, alkylphosphoryl, or alkylsilyl;
- Y is selected from O, N, and S, and
- R3 is hydrogen or R4—O—C(O)—CH2—, wherein R4 is selected from hydrogren, and a C1-C5 alkyl group.
5 more elements
A process for preparing L-glufosinate or its salts, wherein the process comprises preparing a compound of formula (I)
- wherein, R1 is an amino protecting group, R2 is a carboxylic acid protecting group, and Z is halogen or a hydroxy group;
- converting n L-homoserine lactone of formula (IV) or its salt, to compound of formula (I):
- wherein the compound of formula (IV) is substantially free of a compound of formula (V):
- wherein:
- R is hydrogen, alkyl, aryl, acyl, alkylsulfonate esters, alkylnitrate ester, alkylphosphoryl, or alkylsilyl;
- Y is selected from O, N, and S;
- and
- R3 is hydrogen or R4—O—C(O)—CH2—, wherein R4 is selected from hydrogen, and a C1 to C5 alkyl group.
5 more elements
Dependencies are inferred from the claim text.