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:
Jun. 26, 2018
Filed:
Apr. 07, 2015
Applicant:
Cilag Ag, Schaffhausen, CH;
Inventors:
Georg Ulrich Weigl, Schaffhausen, CH;
Dominik Stefan Stämpfli, Schaffhausen, CH;
Nelli Maurer, Schaffhausen, CH;
Assignee:
Noramco GmbH, Neuhausen am Rheinfall, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 489/08 (2006.01);
U.S. Cl.
CPC ...
C07D 489/08 (2013.01);
Abstract
The present invention relates to an improved process for O-demethylating methoxy substituted morphinan-6-one derivatives using AlCl3 as a demethylating agent in a reaction-inert solvent having a water content ranging from 0.1% wt to 0.8% wt. 10.