US Patent 7585998 Method for producing difluoro-acetyl-acetic acid alkylesters
Patent 7585998 was granted and assigned to Bayer CropScience Limited on September, 2009 by the United States Patent and Trademark Office.
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Patent abstract
The present invention relates to a three-step method for the preparation of alkyl esters of 4,4-difluoroacetoacetic acid in which in the first step alkyl esters of 4-chloro-4,4-difluoroacetic acid are reacted with trialkylphosphites of formula (III)P(OR1)3 (III)in which R1 stands for C1-C4-alkyl, whereby the residues R1 can in each case be the same or different,to form alkyl phosphonates of formula (IV)
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US Patent 07585998 Method for producing difluoro-acetyl-acetic acid alkylesters US Patent 7585998 Method for producing difluoro-acetyl-acetic acid alkylesters
Infobox
Patent Number
0758599800
Patent Number
758599800
Edits on 24 Apr, 2023
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
075859980
Date of Patent
September 8, 2009
0Patent Application Number
105610310
Date Filed
June 18, 2004
0Official Website
Patent Primary Examiner
Edits on 27 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
075859980
Date of Patent
September 8, 2009
0Patent Application Number
105610310
Date Filed
June 18, 2004
0Official Website
Patent Primary Examiner
Edits on 18 Jun, 2022
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US Patent 07585998 Method for producing difluoro-acetyl-acetic acid alkylesters
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07585998
Date of patent
September 8, 2009
Patent application number
10561031
Date Filed
June 18, 2004
Patent primary examiner
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