Patents by Inventor Chao-Jun Li

Chao-Jun Li 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).

  • Patent number: 11098036
    Abstract: The present disclosure relates to reagents and method for performing trifluoromethylation, difluoromethylation or alkylation of aromatic or heteroaromatic rings in a redox-neutral manner without any catalyst which are enabled by light. In addition, there are methods for synthesizing the starting reagents used in the trifluoromethylation, difluoromethylation or alkylation reactions.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: August 24, 2021
    Assignee: THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY
    Inventors: Chao-Jun Li, Wenbo Liu, Peng Liu
  • Patent number: 10995051
    Abstract: The present invention relates to compounds of formula (I): in which R1 is a hydrogen atom, a phenyl radical, or a straight or branched, saturated or unsaturated hydrocarbon radical having 1 to 8 carbon atoms.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: May 4, 2021
    Assignee: L'OREAL
    Inventors: Maria Dalko, Xavier Marat, Julien Hitce, Chao-Jun Li
  • Patent number: 10766851
    Abstract: It is provided a method of converting a diaryl ether source such as lignin and/or polyphenylene oxide (PPO) containing 4-O-5 linkages and an inorganic chemical such as ammonia into an organic compound, comprising reacting said diaryl ether source with the inorganic chemical in presence of a catalyst, preferably palladium, transforming the 4-O-5 linkages of said diaryl ether source into the organic compound. It is provided a palladium-catalyzed synthesis of aniline derivatives from 4-O-5 linkage lignin model compounds and cheap industrial inorganic chemical ammonia via dual C(Ar)—O bond cleavage.
    Type: Grant
    Filed: August 22, 2019
    Date of Patent: September 8, 2020
    Assignee: THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING / MCGILL UNIVERSITY
    Inventors: Huiying Zeng, Chao-Jun Li, Dawei Cao
  • Publication number: 20200216430
    Abstract: The present disclosure relates to reagents and method for performing trifluoromethylation, difluoromethylation or alkylation of aromatic or heteroaromatic rings in a redox-neutral manner without any catalyst which are enabled by light. In addition, there are methods for synthesizing the starting reagents used in the trifluoromethylation, difluoromethylation or alkylation reactions.
    Type: Application
    Filed: September 28, 2018
    Publication date: July 9, 2020
    Inventors: Chao-Jun LI, Wenbo LIU, Peng LIU
  • Patent number: 10654788
    Abstract: The present invention relates to compounds of formula (I): in which R1 is a hydrogen atom, a phenyl radical, or a straight or branched, saturated or unsaturated hydrocarbon radical having 1 to 8 carbon atoms.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: May 19, 2020
    Assignee: L'OREAL
    Inventors: Maria Dalko, Xavier Marat, Julien Hitce, Chao-Jun Li
  • Publication number: 20200131108
    Abstract: The present invention relates to compounds of formula (I): in which R1 is a hydrogen atom, a phenyl radical, or a straight or branched, saturated or unsaturated hydrocarbon radical having 1 to 8 carbon atoms.
    Type: Application
    Filed: December 31, 2019
    Publication date: April 30, 2020
    Inventors: Maria DALKO, Xavier MARAT, Julien HITCE, Chao-Jun LI
  • Patent number: 10099203
    Abstract: A method for the preparation of a metal-organic compound is provided. This method comprises the steps of (a) providing at least one metal precursor, (b) providing at least one bridging organic ligand, and (c) exposing together the metal precursor and the ligand to liquid CO2 or supercritical CO2 as a reaction medium, thereby producing said metal-organic compound.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: October 16, 2018
    Assignee: THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY
    Inventors: Tomislav Friscic, Chao-Jun Li, Simon Girard, Cristina Mottillo, Christopher Walter Nickels
  • Publication number: 20180290887
    Abstract: The present disclosure relates to a reversible hydrogen transfer process and storage system using visible light to photocatalytically generate hydrogen from compounds comprising saturated or partially saturated carbocyclic residue and catalytically hydrogenate compounds comprising at least one carbocyclic aromatic residue.
    Type: Application
    Filed: May 19, 2016
    Publication date: October 11, 2018
    Applicants: THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY, THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY
    Inventors: Chao-Jun LI, Zetian MI, Lu LI
  • Publication number: 20180057440
    Abstract: The present invention relates to compounds of formula (I): in which R1 is a hydrogen atom, a phenyl radical, or a straight or branched, saturated or unsaturated hydrocarbon radical having 1 to 8 carbon atoms.
    Type: Application
    Filed: March 14, 2016
    Publication date: March 1, 2018
    Inventors: Maria DALKO, Xavier MARAT, Julien HITCE, Chao-Jun LI
  • Publication number: 20180043330
    Abstract: A method for the preparation of a metal-organic compound is provided. This method comprises the steps of (a) providing at least one metal precursor, (b) providing at least one bridging organic ligand, and (c) exposing together the metal precursor and the ligand to liquid CO2 or supercritical CO2 as a reaction medium, thereby producing said metal-organic compound.
    Type: Application
    Filed: February 22, 2016
    Publication date: February 15, 2018
    Inventors: Tomislav FRISCIC, Chao-Jun LI, Simon GIRARD, Cristina MOTTILLO, Christopher Walter NICKELS
  • Patent number: 8232399
    Abstract: A novel class of chiral ligands represented by a structure of Formula I: wherein R1, R2, R3, R4 and R5 are independently selected from the group consisting of hydrogen, halogen, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, C1-10 alkoxy, C(O)R6, C(O)NHR6, Si(R6)3, benzyl and aryl; X is selected from the group consisting of OH, OR7, O-Prot and P(R7)2 where Prot represents a protecting group; and R6 and R7 are selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, C1-10 alkoxy, phenyl, and aryl is disclosed herein.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: July 31, 2012
    Inventors: Chao-Jun Li, Patricia MacLeod, Zhiping Li, Jianqing Feng
  • Patent number: 8183378
    Abstract: Novel chemical agents are described herein. More a ligand of general Formula I: wherein R1, R2, R3 and R4, are independently selected from the group consisting of hydrogen, halogen, hydroxy, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C1-C10 alkoxy, C1-C10 alkylthio, C(O)R5, C(O)OR5, C(O)NHR5, Si(R5)3, benzyl and aryl; X is selected from the group consisting of Cl, Br, I, OR6, O-Prot, OPR6, P(R6)2, NHR6, N(R6)2, NHCSNHR6, NHCONHR6 and SR6; and R5 and R6 are independently selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, C1-10 alkoxy, phenyl, and aryl. These ligands are useful in asymmetric reactions as well as in asymmetric synthesis of molecules of biological interest.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: May 22, 2012
    Inventors: Chao-Jun Li, Jianqing Feng
  • Publication number: 20100036137
    Abstract: An aqueous process for preparing alkylene carbonates from alkenes and carbon dioxide is described herein. The process comprises the reaction of alkenes with a bromine source, a base and carbon dioxide. The aqueous process can be rendered catalytic by using an oxidant capable of in situ conversion of bromide into bromine.
    Type: Application
    Filed: September 21, 2007
    Publication date: February 11, 2010
    Inventors: Chao-Jun Li, Nicolas Dara Eghbali
  • Publication number: 20090306390
    Abstract: A novel class of chiral ligands represented by a structure of Formula (I): wherein R1, R2, R3, R4 and R5 are independently selected from the group consisting of hydrogen, halogen, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, C1-10 alkoxy, C(O)R6, C(O)NHR6, Si(R6)3, benzyl and aryl; X is selected from the group consisting of OH, OR7, O-Prot and P(R7)2 where Prot represents a protecting group; and R6 and R7 are selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, C1-10 alkoxy, phenyl, and aryl is disclosed herein.
    Type: Application
    Filed: March 2, 2007
    Publication date: December 10, 2009
    Applicant: Chao-Jun Li
    Inventors: Chao-Jun Li, Patricia MacLeod, Zhiping Li, Jianqing Feng
  • Publication number: 20090247757
    Abstract: Novel chemical agents are described herein. More a ligand of general Formula I: wherein R1, R2, R3 and R4, are independently selected from the group consisting of hydrogen, halogen, hydroxy, C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C1-C10 alkoxy, C1-C10 alkylthio, C(O)R5, C(O)OR5, C(O)NHR5, Si(R5)3, benzyl and aryl; X is selected from the group consisting of Cl, Br, I, OR6, O-Prot, OPR6, P(R6)2, NHR6, N(R6)2, NHCSNHR6, NHCONHR6 and SR6; and R5 and R6 are independently selected from the group consisting of hydrogen, C1-10 alkyl, C2-10 alkenyl, C2-10 alkynyl, C1-10 alkoxy, phenyl, and aryl. These ligands are useful in asymmetric reactions as well as in asymmetric synthesis of molecules of biological interest.
    Type: Application
    Filed: November 7, 2008
    Publication date: October 1, 2009
    Applicant: Chao-Jun Li
    Inventors: Chao-Jun Li, Jianqing Feng
  • Publication number: 20070275992
    Abstract: The present invention provides methods for synthesizing novel tetrahydroquinoline derivatives that are useful for cancer chemotherapy and anti-viral applications. The present invention provides compounds useful for cancer chemotherapy and methods for the preparation of these compounds. The present invention also includes cancer chemotherapy methods.
    Type: Application
    Filed: July 12, 2007
    Publication date: November 29, 2007
    Inventors: Chao-Jun Li, Jianheng Zhang
  • Patent number: 7250423
    Abstract: The present invention provides methods for synthesizing novel tetrahydroquinoline derivatives that are useful for cancer chemotherapy and anti-viral applications. The present invention provides compounds useful for cancer chemotherapy and methods for the preparation of these compounds. The present invention also includes cancer chemotherapy methods.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: July 31, 2007
    Inventors: Chao-Jun Li, Jianheng Zhang
  • Publication number: 20030149069
    Abstract: The present invention provides methods for synthesizing novel tetrahydroquinoline derivatives that are useful for cancer chemotherapy and anti-viral applications. The present invention provides compounds useful for cancer chemotherapy and methods for the preparation of these compounds. The present invention also includes cancer chemotherapy methods.
    Type: Application
    Filed: September 24, 2002
    Publication date: August 7, 2003
    Inventors: Chao-Jun Li, Jianheng Zhang