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. 04, 2012
Filed:
Dec. 19, 2008
Applicants:
Annibale Salvi, Milan, IT;
Antonio Nardi, Segrate, IT;
Stefano Maiorana, Milan, IT;
Mara Sada, Segrate, IT;
Inventors:
Annibale Salvi, Milan, IT;
Antonio Nardi, Segrate, IT;
Stefano Maiorana, Milan, IT;
Mara Sada, Segrate, IT;
Assignee:
Laboratorio Chimico Internazionale S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 49/593 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention concerns a new process for the preparation of high purity diacerein, by oxidization of the protected aloe-emodin in the presence of an oxidizing system and radical catalyst and subsequent substitution of the protector groups with acetyl groups.