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:
Nov. 27, 2012
Filed:
Aug. 11, 2010
Applicants:
Norbert Lui, Odenthal, DE;
Jens-dietmar Heinrich, Burscheid, DE;
Christian Funke, Leichlingen, DE;
Inventors:
Assignee:
Bayer Cropscience AG, Monheim, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07D 307/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Process for preparing 2,4-dioxotetrahydrofuran-3-carboxylates of the formula (I) and/or (I') comprising the reaction of a haloacetyl chloride compound of the formula (II) with a malonic ester of the formula (III) in which Hal, Rand Rhave the definitions stated in the application, in the presence of a suitable base and optionally in the presence of a solvent; the addition of a sufficient amount of water to the reaction mixture; and the isolation of the desired 2,4-dioxotetrahydrofuran-3-carboxylate.