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. 12, 1980
Filed:
Dec. 27, 1978
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
Improved process for preparing anthranylaldehyde derivatives of formula: ##STR1## (Z.sup.1 and Z.sup.2 each represents hydrogen atom, a halogen atom, methyl group or trifluoromethyl group.) is provided. The process comprises steps of (1) protecting aldehyde group of a o-halogenobenzaldehyde with a specific alkylamine derivative, then (2) reacting the thus protected compound with a corresponding aniline derivative, and finally, (3) treating the thus obtained product with an acid. The anthranylaldehyde derivatives, i.a. N-(2,6-dichlorophenyl)anthranylaldehyde is useful as an intermediate for preparation of the corresponding anilinophenylacetic acids which are anti-inflammatory and analgesic agents.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile