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:
Jan. 30, 1979
Filed:
Apr. 28, 1977
Theodor Papenfuhs, Frankfurt am Main, DE;
Kurt Gengnagel, Offenbach am Main, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A new process, which can be carried out on the technical scale, had been found for the preparation of 2-alkoxy-6-bromo-naphthalenes, especially suitable as starting compounds for the synthesis of estrogens, which comprises brominating 2-hydroxy-naphthalene-1-carboxylic acid with bromine, decarboxylating the 6-bromo-2-hydroxynaphthalene-1-carboxylic acid by heating the reaction mixture at 100 - 125.degree. C, and alkylating the 6-bromo-2-hydroxy-naphthalene formed. The process can be conducted easily and with high yields.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile