The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2007
Filed:
Feb. 19, 2003
John Stewart Moilliet, Lancashire, GB;
John Stewart Moilliet, Lancashire, GB;
F2 Chemicals Limited, , GB;
Abstract
The invention provides a method for the preparation of a dicarbonyl compound of formula (I) RCOCFRCORwherein Ris selected from alkyl, substituted alkyl, cycloalkyl, aryl, substituted aryl and acetoxy, Ris selected from hydrogen, halogen, nitro, cyano, alkyl, substituted alkyl, cycloalkyl, acetoxy, aryl and substituted aryl, and Ris selected from alkyl, substitued alkyl, oxyalkyl and substituted oxyalkyl, the method comprising treating a dicarbonyl compound of formula (II) RCOCHRCORwith elemental fluorine in a solvent which consists of methanol or aqueous methanol. The method provides an inexpensive and convenient synthetic route to 2-fluoro- and 2,2-difluoro-1,3-diketones and -1,3-ketoesters.