Patents by Inventor Denis Prat

Denis Prat 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).

  • Method and intermediates for preparing 19-norsteroid compounds
    Patent number: 8258328
    Abstract: The subject of the invention is a method for preparing compounds of general formula (I): in which A, Z, R3 are as defined in the description, and the intermediate compounds for carrying out this method.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: September 4, 2012
    Assignee: Aventis Pharma S.A.
    Inventors: Denis Prat, Christian Moratille, Francoise Benedetti, Lahlou Nait-Bouda
  • NOVEL METHOD AND INTERMEDIATES FOR PREPARING 19-NORSTEROID COMPOUNDS
    Publication number: 20110046402
    Abstract: The subject of the invention is a method for preparing compounds of general formula (I): in which A, Z, R3 are as defined in the description, and the intermediate compounds for carrying out this method.
    Type: Application
    Filed: October 29, 2010
    Publication date: February 24, 2011
    Applicant: Aventis Pharma S.A.
    Inventors: Denis Prat, Christian Moratille, Francoise Benedetti, Lahlou Nait-Bouda
  • Method for preparing oestrogen derivatives
    Patent number: 7381718
    Abstract: A process for the preparation of compounds of formula (I) in which R1, R2, R3 and n are defined as indicated in the description, use of said compounds as intermediates for the preparation of estrogen derivatives as well as the intermediates of this process.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: June 3, 2008
    Assignee: Aventis Pharma S.A.
    Inventors: Francoise Benedetti, Alain Mazurie, Francois Nique, Denis Prat, Christian Wehrey
  • Crystalline Forms of 3-Beta-Amino 17-Methylene Androstane-6-Alpha 7-Beta-Diol Hydrochloride
    Publication number: 20080051382
    Abstract: The invention relates to novel crystalline forms of 3-beta-amino-17-methylene-androstane-6-alpha,7-beta-diol hydrochloride, referred to as form A, form B and form C, a method for preparing same, the use thereof as a drug, and pharmaceutical compositions containing same.
    Type: Application
    Filed: October 20, 2004
    Publication date: February 28, 2008
    Applicant: INFLAZYME PHARMACEUTICALS LTD.
    Inventors: Colette Colladant, Denis Prat, Pascal Billot, Alexandre Giuliani, Hagit Elnaleh, Marc-Antoine Perrin
  • Novel method and intermediates for preparing 19-norsteroid compounds
    Publication number: 20040229853
    Abstract: The subject of the invention is a method for preparing compounds of general formula (I): 1
    Type: Application
    Filed: April 29, 2004
    Publication date: November 18, 2004
    Applicant: Aventis Pharma S.A.
    Inventors: Denis Prat, Christian Moratille, Francoise Benedetti, Lahlou Nait-Bouda
  • Method for preparing oestrogen derivatives
    Publication number: 20040171595
    Abstract: A process for the preparation of compounds of formula (I) 1
    Type: Application
    Filed: January 12, 2004
    Publication date: September 2, 2004
    Inventors: Francoise Benedetti, Alain Mazurie, Francois Nique, Denis Prat, Christian Wehrey
  • Intermediates for the preparation of 6.alpha., 9.alpha.-difluoro steroids
    Patent number: 5556965
    Abstract: A compound of the formula ##STR1## wherein R is hydrogen or an ester remainder, X is hydrogen or fluorine and Y combined with the doted lines represents ##STR2## or X is hydrogen and and Y combined with the dotted lines is ##STR3## and R.sub.1 is the remainder of an enol ether or ester.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: September 17, 1996
    Assignee: Roussel Uclaf
    Inventors: Jean-Yves Godard, Philippe Mackiewicz, Denis Prat, Christian Richard
  • Preparation of 6.alpha., 9.alpha.-difluoro steroids
    Patent number: 5478957
    Abstract: A process for the preparation of 6.alpha.,9.alpha.-difluoro steroids of the formula ##STR1## wherein R is hydrogen or an ester remainder.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: December 26, 1995
    Assignee: Roussel-UCLAF
    Inventors: Jean-Yves Godard, Philippe Mackiewicz, Denis Prat, Christian Richard
  • Process for the preparation of 20-keto-21 alpha-01-steroids
    Patent number: 5399685
    Abstract: A process for the preparation of a compound of the formula ##STR1## wherein R.sub.1 is alkyl of 1 to 3 carbon atoms, R.sub.2 is alkyl of 1 to 12 carbon atoms, R.sub.3 is alkyl of 1 to 4 carbon atoms comprising reacting a compound of the formula ##STR2## wherein R.sub.4 is a remainder of an easily cleavable ether, K is a protected ketone function in the form of ketal, thioketal or mixed ketal and R.sub.1 has the above definition with a magnesium organic compound reagent of the formulaHalMg--CH.sub.2 --R.sub.2 Awherein Hal is a halogen and R.sub.2 is defined as above to obtain a compound of the formula ##STR3## wherein R.sub.1, R.sub.2 and K are defined as above, reacting the latter with an acylation agent to obtain a compound of the formula ##STR4## wherein R.sub.5 is alkyl of 1 to 6 carbon atoms or aryl of 6 to 10 carbon atoms and R.sub.1, R.sub.2 and K are defined as above, reacting the latter with an appropriate alkylation agent to obtain a compound of the formula ##STR5## wherein R.sub.1, R.sub.2, R.sub.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: March 21, 1995
    Assignee: Roussel-Uclaf
    Inventors: Jean Buendia, Veronique Crocq, Christian Masson, Denis Prat, Michel Vivat