Patents by Inventor Mauro Andretto

Mauro Andretto 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 preparing enantiomerically enriched oxamides
    Patent number: 9481686
    Abstract: The present invention relates to a chiral oxamide of formula (I) useful as an intermediate in the preparation of dorzolamide, and to the preparation thereof. The invention also relates to the preparation of dorzolamide, to the hydrochloride salt thereof, and to the active ingredient contained in a drug useful in the treatment of glaucoma, by means of the intermediate of formula (I).
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: November 1, 2016
    Assignee: ZACH SYSTEM S.P.A.
    Inventors: Raffaella Volpicelli, Antonio Nardi, Mauro Andretto, Ilaria Munari, Roberto Brescello, Anna Smaniotto, Livius Cotarca, Massimo Verzini
  • Process for Preparing Enantiomerically Enriched Oxamides
    Publication number: 20150191485
    Abstract: The present invention relates to a chiral oxamide of formula (I) useful as an intermediate in the preparation of dorzolamide, and to the preparation thereof. The invention also relates to the preparation of dorzolamide, to the hydrochloride salt thereof, and to the active ingredient contained in a drug useful in the treatment of glaucoma, by means of the intermediate of formula (I).
    Type: Application
    Filed: June 28, 2013
    Publication date: July 9, 2015
    Inventors: Raffaella Volpicelli, Antonio Nardi, Mauro Andretto, Ilaria Munari, Roberto Brescello, Anna Smaniotto, Livius Cotarca, Massimo Verzini
  • Process for preparing Bosentan monohydrate and it's intermediates
    Patent number: 8933226
    Abstract: The present invention relates to a process for preparing Bosentan Monohydrate; in particular, the present invention provides the preparation of the novel 4-tert-butyl-N-[6-(2-hydroxy-ethoxy)-5-(2-methoxy-phenoxy)-2-(2-pyrimidinyl)-pyrimidin-4-yl]-benzenesulfonamide sodium salt as an ethylene glycol solvate (Bosentan sodium salt ethylene glycol solvate), which is a useful intermediate for obtaining Bosentan Monohydrate in a pure form.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: January 13, 2015
    Assignee: Zach Systems S.p.A.
    Inventors: Livius Cotarca, Massimo Verzini, Elisa Melotto, Ivan Michieletto, Alfonso Melloni, Paolo Maragni, Raffaella Volpicelli, Mauro Andretto, Corrado Colli
  • Asymmetric reduction process
    Patent number: 8927740
    Abstract: The present invention relates to a stereoselective reduction procedure to obtain, by means of catalytic asymmetric hydrogenation by hydrogen transfer, a compound of formula (I) in which X is S or SO2 and R4 is hydrogen or an SO2NH2 group, from the corresponding ketone precursor, said compound of formula (I) being useful as an intermediate in the preparation of dorzolamide or of the hydrochloride salt thereof.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: January 6, 2015
    Assignee: Zach System S.P.A.
    Inventors: Raffaella Volpicelli, Mauro Andretto, Livius Cotarca, Antonio Nardi, Massimo Verzini
  • ASYMMETRIC REDUCTION PROCESS
    Publication number: 20130338377
    Abstract: The present invention relates to a stereoselective reduction procedure to obtain, by means of catalytic asymmetric hydrogenation by hydrogen transfer, a compound of formula (I) in which X is S or SO2 and R4 is hydrogen or an SO2NH2 group, from the corresponding ketone precursor, said compound of formula (I) being useful as an intermediate in the preparation of dorzolamide or of the hydrochloride salt thereof.
    Type: Application
    Filed: March 8, 2012
    Publication date: December 19, 2013
    Applicant: ZACH SYSTEM S.P.A.
    Inventors: Raffaella Volpicelli, Mauro Andretto, Livius Cotarca, Antonio Nardi, Massimo Verzini
  • PROCESS FOR PREPARING BOSENTAN MONOHYDRATE AND ITS INTERMEDIATED
    Publication number: 20130253195
    Abstract: The present invention relates to a process for preparing Bosentan Monohydrate; in particular, the present invention provides the preparation of the novel 4-tert-butyl-N-[6-(2-hydroxy-ethoxy)-5-(2-methoxy-phenoxy)-2-(2-pyrimidinyl)-pyrimidin-4-yl]-benzenesulfonamide sodium salt as an ethylene glycol solvate (Bosentan sodium salt ethylene glycol solvate), which is a useful intermediate for obtaining Bosentan Monohydrate in a pure form.
    Type: Application
    Filed: September 22, 2011
    Publication date: September 26, 2013
    Applicant: ZACH SYSTEM SPA
    Inventors: Livius Cotarca, Massimo Verzini, Elisa Melotto, Ivan Michieletto, Alfonso Melloni, Paolo Maragni, Raffaella Volpicelli, Mauro Andretto, Corrado Colli