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. 24, 1993
Filed:
Jul. 01, 1991
Applicant:
Inventors:
William J Begley, Webster, NY (US);
Robert C Stewart, Spencerport, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07C / ;
U.S. Cl.
CPC ...
548251 ; 544 89 ; 564166 ; 564 99 ;
Abstract
A process for preparation of a 2,3 or 4-oxo-benzaldehyde or ketone compound by reaction of a 2,3 or 4-hydroxy benzaldehyde or ketone with an ortho, meta or parabromo or chloralkylphenoxy compound comprises reaction of the bromo or chloroalkylphenoxy compound with potassium iodide to form an iodo compound in situ; then, reaction of the resulting product with a 2, 3 or 4-hydroxybenzaldehyde or ketone in the presence of alkylpyridine and a dipolar aprotic solvent. The resulting compounds are useful for formation of photographic color couplers for use in photographic materials.