NEWCHEM S.P.A. Patent applications |
Patent application number | Title | Published |
20130131335 | METHODS FOR THE PREPARATION OF DROSPIRENONE AND INTERMEDIATES THEREOF - The invention relates to a process for the preparation of Drospirenone in high yields and purity starting from a compound of formula 2 | 05-23-2013 |
20100222571 | PROCESS FOR THE PREPARATION OF DROSPIRENONE - 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. | 09-02-2010 |