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. 04, 2013
Filed:
May. 05, 2010
Alain Dlubala, Paris, FR;
Alain Dlubala, Paris, FR;
Sanofi, Paris, FR;
Abstract
The present invention relates to a method for the preparation of morphine compounds comprising a low content of α,β-unsaturated compounds, which comprises the steps of: (i) bringing the crude morphine compound into contact with a base, at a pH of greater than 13, under conditions which make possible the Michael addition reaction on the α,β-unsaturated compound(s) present; (ii) separating the morphine compound from the reaction mixture; and (iii) if appropriate, separating the addition product formed from the morphine compound. It also relates to a composition comprising at least 99% by dry weight of morphine compound or of a pharmaceutically acceptable salt thereof, and an α,β-unsaturated compound in a content of less than 100 ppm.