Patents by Inventor Jiwu Ruan

Jiwu Ruan 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: 9340519
    Abstract: A substituted paracyclophane of formula (I) is provided 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. 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: July 21, 2014
    Date of Patent: May 17, 2016
    Assignee: Johnson Matthey PLC
    Inventors: Jianliang Xiao, Jiwu Ruan
  • PARACYCLOPHANE-BASED LIGANDS, THEIR PREPARATION AND USE IN CATALYSIS
    Publication number: 20140330012
    Abstract: A substituted paracyclophane of formula (I) is provided 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. 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: July 21, 2014
    Publication date: November 6, 2014
    Applicant: Johnson Matthey Public Limited Company
    Inventors: Jianliang Xiao, Jiwu Ruan
  • 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