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:
Feb. 26, 2013
Filed:
Jul. 21, 2008
Applicants:
Erika Andriolo, Milan, IT;
Mauro Montorsi, Milan, IT;
Stefano Rancan, Milan, IT;
Edoardo Mariani, Milan, IT;
Marco Bandini, Bologna, IT;
Michele Contento, Bologna, IT;
Achille Umani-ronchi, Bologna, IT;
Inventors:
Erika Andriolo, Milan, IT;
Mauro Montorsi, Milan, IT;
Stefano Rancan, Milan, IT;
Edoardo Mariani, Milan, IT;
Marco Bandini, Bologna, IT;
Michele Contento, Bologna, IT;
Achille Umani-Ronchi, Bologna, IT;
Assignee:
Newchem S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07J 53/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for the preparation of Drospirenone (I) according to the scheme (A) wherein the substituent R is defined in the description. The process improves the product yield and purity by reducing the formation of undesired side-products and is particularly convenient for industrial-scale manufacturing.