Patents by Inventor Jianliang Xiao

Jianliang Xiao 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).

  • Paracyclophane-based ligands, their preparation and use in catalysis
    Patent number: 8822680
    Abstract: A substituted paracyclophane is described of formula (I) wherein X1 and X2 are linking groups comprising between 2 to 4 carbon atoms, Y1 and Y2 are selected from the group consisting of hydrogen, halide, oxygen, nitrogen, alkyl, cycloalkyl, aryl or heteroaryl and Z is a substituted or unsubstituted alkyl group, aryl group or heteroaryl group. Preferably X1 and X2 are —(C2H4)— and Z is a substituted aryl group. The substituted paracyclophane provides transition metal catalysts that are useful in C—C and C—N bond formation and asymmetric hydrogenation reactions.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: September 2, 2014
    Assignee: Johnson Matthey PLC
    Inventors: Jianliang Xiao, Jiwu Ruan
  • PARACYCLOPHANE-BASED LIGANDS, THEIR PREPARATION AND USE IN CATALYSIS
    Publication number: 20110028718
    Abstract: A substituted paracyclophane is described of formula (I) wherein X1 and X2 are linking groups comprising between 2 to 4 carbon atoms, Y1 and Y2 are selected from the group consisting of hydrogen, halide, oxygen, nitrogen, alkyl, cycloalkyl, aryl or heteroaryl and Z is a substituted or unsubstituted alkyl group, aryl group or heteroaryl group. Preferably X1 and X2 are —(C2H4)— and Z is a substituted aryl group. The substituted paracyclophane provides transition metal catalysts that are useful in C—C and C—N bond formation and asymmetric hydrogenation reactions.
    Type: Application
    Filed: August 21, 2008
    Publication date: February 3, 2011
    Applicant: Johnson Matthey Public Limited Company
    Inventors: Jianliang Xiao, Jiwu Ruan
  • Nitrogen-containing ligands
    Publication number: 20060135355
    Abstract: An immobilised nitrogen-containing ligand is described comprising the reaction product of a compound of formula (I) wherein R5, R6, R7 and R8 are independently hydrogen, a saturated or unsaturated C1-C10 alkyl group, an aryl group, a urethane group, a sulphonyl group or form an imine group, R1, R2, R3, and R4 are independently hydrogen, a saturated or unsaturated C1-C10 alkyl group or an aryl group and at least one of R1, R2, R3 and R4 is functionalised with a functional group, and a solid support having a site capable of reacting with said functional group. The nitrogen-containing ligand is useful for preparing immobilised catalysts for performing e.g. asymmetric catalysis.
    Type: Application
    Filed: July 30, 2003
    Publication date: June 22, 2006
    Inventors: William Hems, Weiping Chen, Jianliang Xiao
  • A Method of Generating A Functionalised Arylphosphine
    Publication number: 20040059159
    Abstract: A method of generating a functionalised arylphosphine, novel intermediates and novel functinalised arylphosphines.
    Type: Application
    Filed: November 8, 2002
    Publication date: March 25, 2004
    Applicant: The University of Liverpool
    Inventors: Jianliang Xiao, Weiping Chen
  • Method of generating a functionalised arylphosphine
    Publication number: 20030181767
    Abstract: A method of generating a functionalised arylphosphine, novel intermediates and novel functionalised arylphosphines.
    Type: Application
    Filed: November 8, 2002
    Publication date: September 25, 2003
    Inventors: Jianliang Xiao, Weiping Chen