Patents by Inventor Stephen Patrick FLETCHER

Stephen Patrick FLETCHER 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).

  • LIGANDS AND CATALYSTS
    Publication number: 20190009259
    Abstract: The present invention relates to a compound of formula (I) and salts thereof, The present invention further relates to catalytic complexes comprising a compound of formula I and uses thereof in the stereoselective synthesis of stereocentres, in particular, all-carbon quaternary stereocentres.
    Type: Application
    Filed: July 6, 2018
    Publication date: January 10, 2019
    Inventors: Stephen Patrick FLETCHER, Zhenbo GAO
  • Catalysts, ligands and use thereof
    Patent number: 9636670
    Abstract: According to the present invention, there is provided a catalytic complex comprising a metal, one or more ligands and one or more counterions, wherein said one or more ligands include a non-racemic chiral ligand and wherein said one or more counterions include a triflimide counterion. Also provided are methods of making said catalytic complex and processes for producing chiral compounds which involve the use of said catalytic complex. In addition, the present invention provides compounds of the formula (2) as defined herein. The compounds of formula (2) may be useful as ligands in catalytic complexes.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: May 2, 2017
    Assignee: Oxford University Innovation Limited
    Inventors: Stephen Patrick Fletcher, Rebecca Marie Maksymowicz, Philippe Marie-Christophe Roth, Mireia Sidera Portela
  • CATALYSTS, LIGANDS AND USE THEREOF
    Publication number: 20160074852
    Abstract: According to the present invention, there is provided a catalytic complex comprising a metal, one or more ligands and one or more counterions, wherein said one or more ligands include a non-racemic chiral ligand and wherein said one or more counterions include a triflimide counterion. Also provided are methods of making said catalytic complex and processes for producing chiral compounds which involve the use of said catalytic complex. In addition, the present invention provides compounds of the formula (2) as defined herein. The compounds of formula (2) may be useful as ligands in catalytic complexes.
    Type: Application
    Filed: April 10, 2014
    Publication date: March 17, 2016
    Inventors: Stephen Patrick FLETCHER, Rebecca Marie MAKSYMOWICZ, Philippe Marie-Christophe ROTH, Mireia Sidera PORTELA