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. 25, 1976
Filed:
Feb. 14, 1974
Applicant:
Inventors:
Victor Malcolm Clark, Coventry, EN;
Gordon Ian Gregory, Chalfont St. Peter, EN;
Godfrey Basil Webb, Greenford, EN;
Assignee:
Glaxo Laboratories Limited, Greenford, EN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ; 2602 / ; 2603 / ; 2603473 ; 260516 ; 2605 / ; 260519 ;
Abstract
2-Aryl-2-hydroxyiminoacetic acids rich in the syn isomer are prepared by reaction of an arylglyoxylic acid with hydroxylamine in an aqueous reaction medium, e.g. water, in the presence of a source of magnesium, calcium or zinc ions, e.g. magnesium hydroxide. The acids so obtained are of value as synthetic intermediates in the preparation of penicillin and cephalosporin antibiotics containing syn-2-aryl-2-hydroxyiminoacetamido side chains.