Patents by Inventor Ronan Guevel

Ronan Guevel 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).

  • PHOTOCHEMICAL PROCESS FOR PRODUCING ARTEMISININ
    Publication number: 20130299338
    Abstract: Provided is a new photochemical process for preparing artemisinin. Also provided are certain dihydroartemisinic acid derivatives useful for preparing artemisinin.
    Type: Application
    Filed: July 12, 2013
    Publication date: November 14, 2013
    Inventors: Jildaz DHAINAUT, Alain Dlubala, Ronan Guevel, Alain Medard, Gilles Oddon, Nicolas Raymond, Joel Turconi
  • Photochemical process for producing artemisinin
    Patent number: 8507697
    Abstract: Provided is a new photochemical process for preparing artemisinin. Also provided are certain dihydroartemisinic acid derivatives useful for preparing artemisinin.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: August 13, 2013
    Assignee: Sanofi
    Inventors: Jildaz Dhainaut, Alain Dlubala, Ronan Guevel, Alain Medard, Gilles Oddon, Nicolas Raymond, Joel Turconi
  • PHOTOCHEMICAL PROCESS FOR PRODUCING ARTEMISININ
    Publication number: 20110065933
    Abstract: Provided is a new photochemical process for preparing artemisinin. Also provided are certain dihydroartemisinic acid derivatives useful for preparing artemisinin.
    Type: Application
    Filed: September 1, 2010
    Publication date: March 17, 2011
    Inventors: Jildaz DHAINAUT, Alain Dlubala, Ronan Guevel, Alain Medard, Gilles Oddon, Nicolas Raymond, Joel Turconi
  • Process for and intermediates in the preparation of canfosfamide and its salts
    Publication number: 20060135409
    Abstract: A process for and intermediates in the preparation of canfosfamide and its salts. Some of the intermediates have anticancer activity.
    Type: Application
    Filed: December 21, 2004
    Publication date: June 22, 2006
    Inventors: William Boulanger, Steven Collier, Stephen Eastham, Dennis Edie, Ronan Guevel, Pedro Abad, R. Herr, Hans Kjaersgaard, Harold Meckler, Robert Polomski, Steven Schow, Pavel Zhichkin
  • Process for preparing and isolating 9-deoxo-9 (Z)-hydroxyiminoerythromycin A
    Patent number: 6590084
    Abstract: The present invention relates to a process for preparing 9-deoxo-9(Z)-hydroxyiminoerythromycin A corresponding to formula (I) below: from 9-deoxo-9(E)-hydroxyiminoerythromycin A by reaction with a base in water or in a mixture of water/solvent of dialkyl ketone type capable of forming a crystallizable solvate with the desired 9(Z)-oxime; acidification of the reaction mixture to a pH of between 9 and 11; addition to the said mixture of an organic solvent; optionally concentration under vacuum of the resulting organic phase; and isolation of the desired 9(Z)-erythromycin oxime.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: July 8, 2003
    Assignee: Merial
    Inventors: François Basset, Thierry Durand, Ronan Guevel, Patrick Leon, Frédéric Lhermitte, Gilles Oddon, Denis Pauze
  • Process of use in converting the 4?(S)-OH functional group of the cladinose unit of an azamacrolide to 4?(R)-NH2
    Patent number: 6353096
    Abstract: The subject-matter of the invention is a process for the stereoselective preparation of a compound of general formula I by stereoselective displacement by a nitrogenous nucleophilic compound of the activated alcohol functional group present at this 4″ position in a corresponding derivative of formula II.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: March 5, 2002
    Assignee: Merial
    Inventors: Patrick Leon, Frederic Lhermitte, Ronan Guevel, Denis Pauze, Laurent Garel, Gilles Oddon
  • Process for preparing and isolating 9-deoxo-9 (Z)-hydroxyiminoerythromycin A
    Publication number: 20010034434
    Abstract: The present invention relates to a process for preparing 9-deoxo-9(Z)-hydroxyiminoerythromycin A corresponding to formula (I) below: 1
    Type: Application
    Filed: April 23, 2001
    Publication date: October 25, 2001
    Inventors: Francois Basset, Thierry Durand, Ronan Guevel, Patrick Leon, Frederic Lhermitte, Gilles Oddon, Denis Pauze
  • Process of use in converting the 4?(S)-OH functional group of the cladinose unit of an azamacrolide to 4?(R)-NH2
    Patent number: RE40040
    Abstract: The subject-matter of the invention is a process for the stereoselective preparation of a compound of general formula I by stereoselective displacement by a nitrogenous nucleophilic compound of the activated alcohol functional group present at this 4? position in a corresponding derivative of formula II.
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: January 29, 2008
    Assignee: Merial Limited
    Inventors: Patrick Leon, Frederic Lhermitte, Ronan Guevel, Denis Pauze, Laurent Garel, Gilles Oddon