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:
Feb. 03, 2004
Filed:
Dec. 09, 2002
Applicant:
Inventors:
Timothy J. N. Watson, Waterford, CT (US);
Patrice Arpin, Sorel-Tracy, CA;
Michael G. Vetelino, North Stonington, CT (US);
Assignee:
Pfizer Inc, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 4/590 ;
U.S. Cl.
CPC ...
C07C 4/590 ;
Abstract
A process for the purification of 2-methoxy-5-trifluoro-methoxy benzaldehyde oil in which the oil is converted to amine by reaction of a nitroaniline with the oil; the imine is isolated as a solid; and the solid imine is converted back to the 2-methoxy-5-trifluoromethoxy benzaldehyde oil. The nitroaniline is selected from the group consisting of 3-nitroaniline, 3-methyl-2-nitroaniline, 4-methyl-2-nitroaniline, 2 methyl-3-nitroaniline and 4-methyl-3-nitroaniline.