Patents by Inventor Alain Chenede

Alain Chenede 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 FOR PREPARING A CHELATING LIGAND DERIVED FROM PCTA
    Publication number: 20230339945
    Abstract: The present invention relates to a process for preparing the macrocyclic ligand of formula (L) below: involving: i) decomplexation of the complex of formula (II): constituted of at least 80% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: ii) removing the gadolinium salt formed in step i), for example by filtration, and ii) recovering the free macrocyclic ligand of formula (L). The present invention also relates to a composition comprising the diastereoisomerically enriched complex of formula (II) and the macrocyclic ligand of formula (L).
    Type: Application
    Filed: July 19, 2021
    Publication date: October 26, 2023
    Applicant: GUERBET
    Inventors: Martine CERF, Soizic LE GRENEUR, Alain CHÉNEDÉ, Bruno FRANÇOIS
  • COMPLEX OF GADOLINIUM AND A CHELATING LIGAND DERIVED FROM A DIASTEREOISOMERICALLY ENRICHED PCTA AND PREPARATION AND PURIFICATION PROCESS
    Publication number: 20230149568
    Abstract: The present invention relates to a complex of formula (II) constituted of at least 90% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing and purifying said complex of formula (II), and also to a composition comprising said complex.
    Type: Application
    Filed: January 16, 2023
    Publication date: May 18, 2023
    Inventors: Soizic LE GRENEUR, Alain CHÉNEDÉ, Martine CERF, Myriam PETTA, Emmanuelle MARAIS, Bruno FRANÇOIS, Caroline ROBIC, Stéphanie LOUGUET
  • Complex of gadolinium and a chelating ligand derived from a diastereoisomerically enriched PCTA and preparation and purification process
    Patent number: 11590246
    Abstract: The present invention relates to a complex of formula (II) constituted of at least 90% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing and purifying said complex of formula (II), and also to a composition comprising said complex.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: February 28, 2023
    Assignee: GUERBET
    Inventors: Soizic Le Greneur, Alain Chénedé, Martine Cerf, Myriam Petta, Emmanuelle Marais, Bruno François, Caroline Robic, Stéphanie Louguet
  • Complex of gadolinium and a chelating ligand derived of a diastereoisomerically enriched PCTA and synthesis method
    Patent number: 11426470
    Abstract: The present invention relates to a complex of formula (II) constituted of at least 80% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing said complex of formula (II), and also to two synthetic intermediates.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: August 30, 2022
    Assignee: GUERBET
    Inventors: Soizic Le Greneur, Alain Chénedé, Martine Cerf, Stéphane Decron, Bruno François
  • Complex of gadolinium and a chelating ligand derived from a diastereoisomerically enriched PCTA and preparation and purification process
    Patent number: 11370804
    Abstract: The present invention relates to a complex of formula (II) constituted of at least 90% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing and purifying said complex of formula (II), and also to a composition comprising said complex.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: June 28, 2022
    Assignee: GUERBET
    Inventors: Soizic Le Greneur, Alain Chénedé, Martine Cerf, Myriam Petta, Emmanuelle Marais, Bruno François, Caroline Robic, Stéphanie Louguet
  • COMPLEX OF GADOLINIUM AND A CHELATING LIGAND DERIVED OF A DIASTEREOISOMERICALLY ENRICHED PCTA AND SYNTHESIS METHOD
    Publication number: 20220098218
    Abstract: The present invention relates to a complex of formula (II) constituted of at least 80% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing said complex of formula (II), and also to two synthetic intermediates.
    Type: Application
    Filed: January 17, 2020
    Publication date: March 31, 2022
    Inventors: Soizic LE GRENEUR, Alain CHÉNEDÉ, Martine CERF, Stéphane DECRON, Bruno FRANÇOIS
  • COMPLEX OF GADOLINIUM AND A CHELATING LIGAND DERIVED FROM A DIASTEREOISOMERICALLY ENRICHED PCTA AND PREPARATION AND PURIFICATION PROCESS
    Publication number: 20220062443
    Abstract: The present invention relates to a complex of formula (II) constituted of at least 90% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing and purifying said complex of formula (II), and also to a composition comprising said complex.
    Type: Application
    Filed: January 17, 2020
    Publication date: March 3, 2022
    Inventors: Soizic LE GRENEUR, Alain CHÉNEDÉ, Martine CERF, Myriam PETTA, Emmanuelle MARAIS, Bruno FRANÇOIS, Caroline ROBIC, Stéphanie LOUGUET
  • COMPLEX OF GADOLINIUM AND A CHELATING LIGAND DERIVED FROM A DIASTEREOISOMERICALLY ENRICHED PCTA AND PREPARATION AND PURIFICATION PROCESS
    Publication number: 20210371437
    Abstract: The present invention relates to a complex of formula (II) constituted of at least 90% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing and purifying said complex of formula (II), and also to a composition comprising said complex.
    Type: Application
    Filed: August 16, 2021
    Publication date: December 2, 2021
    Inventors: Soizic LE GRENEUR, Alain CHÉNEDÉ, Martine CERF, Myriam PETTA, Emmanuelle MARAIS, Bruno FRANÇOIS, Caroline ROBIC, Stéphanie LOUGUET
  • COMPLEX OF GADOLINIUM AND A CHELATING LIGAND DERIVED OF A DIASTEREOISOMERICALLY ENRICHED PCTA AND SYNTHESIS METHOD
    Publication number: 20210361782
    Abstract: The present invention relates to a complex of formula (II) constituted of at least 80% of a diastereoisomeric excess comprising a mixture of isomers II-RRR and II-SSS of formulae: The present invention also relates to a process for preparing said complex of formula (II), and also to two synthetic intermediates.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Inventors: Soizic LE GRENEUR, Alain CHÉNEDÉ, Martine CERF, Stéphane DECRON, Bruno FRANÇOIS
  • Method of preparing an ester of an aromatic carboxylic acid bearing at least one perfluoroalkyl group
    Publication number: 20060128984
    Abstract: The invention relates to a method of preparing an ester of an aromatic carboxylic acid bearing at least one perfluoroalkyl group on the aromatic ring and, more specifically, alkyl esters with low carbon condensation. The inventive method is characterised in that it consists in (i) reacting an aromatic compound bearing at least one perfluoroalkyl group and at least one nitrile group on the aromatic ring, an alkanol and a strong protonic acid at a temperature of at least 45° C. and (ii) recovering the ester thus produced.
    Type: Application
    Filed: July 23, 2003
    Publication date: June 15, 2006
    Inventors: Alain Chenede, Laurent Saint-Jalmes, Philippe-Jean Tirel
  • Process for the enantioselective synthesis of propargyl alcohol derivatives of R configuration from the racemic mixtures thereof
    Patent number: 6878842
    Abstract: The invention relates to a novel process for synthesizing organic compounds of general formula (I): said process may be carried out on an industrial scale and makes it possible to obtain from a mixture of racemic alcohols of formula (II), the corresponding chiral alcohols of R configuration, in a high chemical yield.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: April 12, 2005
    Assignee: Galderma Research & Development, S.N.C.
    Inventor: Alain Chenede
  • Process for the enantioselective synthesis of propargyl alcohol derivatives of R configuration from the racemic mixtures thereof
    Publication number: 20040049067
    Abstract: The invention relates to a novel process for synthesizing organic compounds of general formula (I): 1
    Type: Application
    Filed: April 25, 2003
    Publication date: March 11, 2004
    Inventor: Alain Chenede