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:
Dec. 15, 1981
Filed:
Nov. 14, 1979
Franz Landauer, Frankfurt am Main, DE;
Georg Schaeffer, Hofheim am Taunus, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
p-Tert.butylbenzotribromide and the derivatives thereof which is halogen-substituted at the nucleus are prepared under side chain halogenation conditions by bromination of p-tert.butyltoluene and its derivatives substituted at the nucleus by halogen. Practically no undesired bromination in the nucleus or at the tert.butyl radical takes place. By partial saponification of the benzotribromide the corresponding benzoyl bromide is obtained. Further saponification of the latter or complete saponification of the benzotribromide yields p-tert.butylbenzoic acid and derivatives thereof which are halogen substituted at the nucleus, the esters of which can be used in pharmacology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile