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:
Apr. 21, 2020
Filed:
Apr. 21, 2017
Noramco, Llc, Wilmington, DE (US);
Dominique Roberge, Sierre, CH;
Petteri Elsner, Brig, CH;
Christian Oliver Kappe, Graz, AT;
Bernhard Gutmann, Graz, AT;
Ulrich Weigl, Hilzingen, DE;
Douglas Phillip Cox, Eagleville, PA (US);
Noramco, LLC, Wilmington, DE (US);
Abstract
The present disclosure relates to N-demethylation of a compound containing a tertiary N-methylamine, including for example a morphinan alkaloid, in a continuous flow system. In particular, the present disclosure relates to N-demethylation of oxymorphone-3,14-diacetate or 14-hydroxymorphinone-3,14-diacetate using highly active catalytic palladium (0) in a continuous flow system under elevated temperature and pressure condition. The methodology can be utilized towards the synthesis of noroxymorphone via aerobic palladium-catalyzed continuous flow N-demethylation.