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:
May. 24, 2005
Filed:
Jun. 19, 2002
Fumihiko Okabe, Niigata, JP;
Masahiro Torihara, Niigata, JP;
Yoshin Tamai, Niigata, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
A process for the preparation of 2-oxocarboxylic acid esters represented by the following general formula (I), comprising by oxidizing a 2-hydroxycarboxylic acid ester represented by the following general formula (II) in the presence of a nitroxyl radical represented by the following general formula (III), a hypochlorite, a metal bromide and water with the pH of the reaction system being kept within the range of 5 to 7:(I) (II) (III) wherein Rand Rare each independently an alkyl group, an alkenyl group, an alkynyl group, an aryl group or an aralkyl group, which each may be substituted with substituents; and Ris a hydrogen atom, an alkoxyl group, an aralkyloxy group, an acyloxy group or a hydroxyl group.