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. 08, 2015
Filed:
Jul. 30, 2013
Erregierre S.p.a., San Paolo d'Argon, IT;
Massimo Ferrari, Cenate Sotto, IT;
Fabrizio Zinetti, Casazza, IT;
Erregierre S.p.A., San Paolo d'Argon, IT;
Abstract
The present invention describes a process for the synthesis of ursodeoxycholic acid wherein the purification of the crude ursodeoxycholic acid (containing approximately 13-15% of chenodeoxycholic acid impurity) takes place first passing through a salification with imidazole and a subsequent purification via 'methyl ester', which allows a finished product with an extremely low content of known 'cheno and “litho' impurities to be obtained. The present invention also describes the recovery steps of cholic acid and 3α-hydroxy-7-ketocholanic acid from the mother liquors of process intermediates.