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. 11, 1992
Filed:
Apr. 24, 1990
Applicant:
Inventors:
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 20 ;
Abstract
A process for the preparation of alkyl (C.sub.1 -C.sub.3) nitrobenzoates by reacting the nitrobenzoic acid to be esterified with an excess of about 300 to about 600 mol % of an alkanol (C.sub.1 -C.sub.3) in a solvent which is inert towards the starting compounds and the reaction product in the presence of a polyfluoroalkanesulfonic acid of the general formula (1)