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. 12, 1987
Filed:
Mar. 12, 1985
Applicant:
Inventors:
Theodore Horlenko, Corpus Christi, TX (US);
James H George, Portland, TX (US);
Assignee:
Celanese Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560142 ; 560144 ;
Abstract
A process is provided for producing N-acyl-acyloxy aromatic amine, such as 4-acetoxyacetanilide by reacting a hydroxy-aromatic ketoxime with a carboxylic acid anhydride, e.g. acetic anhydride, in the presence of phosphoric or oxalic acid as a Beckmann rearrangement catalyst. Preferably the ketoxime is prepared by reacting a hydroxy aromatic ketone such as 4-hydroxyacetophone with a hydroxyl amine salt, and the ketone is obtained by the Fries rearrangement of a phenolic ester, e.g. phenyl acetate or the Friedel-Crafts acylation of a phenolic compound, e.g. phenol, with an acylating agent, e.g. acetic acid.