Patents by Inventor Valeriano Merli

Valeriano Merli has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of intermediates for the synthesis of diltiazem
    Patent number: 4939295
    Abstract: A process for the preparation of (2S,3S)-threo-2-hydroxy-3-(2-aminophenylthio)-3-(4-methoxyphenyl)-propioni c acid by resolution of the racemic mixture is described.The resolution is carried out by using as resolving agent (1S,2S)-threo-1-phenyl-2-amino-1,3-propanediol or (1S,2S)-threo-1-(4-methylthiophenyl)-2-amino-1,3-propanediol.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: July 3, 1990
    Assignee: Zambon Group S.p.A.
    Inventors: Valeriano Merli, Giorgio Sagramora, Giorgio Soriato