Patents by Inventor Kelvin H. Yong

Kelvin H. Yong 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: 8329905
    Abstract: This application discloses a novel process for the preparation of phosphonate esters useful as intermediates in the preparation of himbacine analogs, themselves useful as thrombin receptor antagonists. The chemistry taught herein can be exemplified by the following scheme: wherein R9 is selected from alkyl, aryl heteroaryl and arylalkyl groups having 1 to 10 carbon atoms, and R11 is selected independently for each occurrence from alkyl, aryl heteroaryl and arylalkyl groups having 1 to 10 carbon atoms and hydrogen, X2 is Cl, Br, or I; X3 is selected from Cl and Br; and PdLn is a supported palladium metal catalyst or a soluble heterogeneous palladium catalyst. The L-derivatizing reagent is a moiety which converts the alcohol functional group of compound 137D to any leaving group which can be displaced by a triorgano-phosphite phosphonating agent.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: December 11, 2012
    Assignee: Merck Sharp & Dohme Corp.
    Inventors: Kelvin H. Yong, Ilia A. Zavialov, Jianguo Yin, Xiaoyong Fu, Thiruvettipuram K. Thiruvengadam
  • Patent number: 7985860
    Abstract: This application discloses a novel process to synthesize 2-(Quinolin-5yo)-4,5-Disubstituted-Azole derivatives, which may be used, for example, as PDE IV inhibitor compounds in pharmaceutical preparations.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: July 26, 2011
    Assignee: Schering Corporation
    Inventors: Timothy D. Cutarelli, Xiaoyong Fu, Timothy L. McAllister, Michael R. Reeder, Jianguo Yin, Kelvin H. Yong, Shuyi Zhang
  • Publication number: 20110124867
    Abstract: The present invention relates to novel processes for the preparation of the compound of the Formula A45: or a physiologically acceptable salt, solvate or prodrug thereof, which has utility, for example, as a pharmaceutically active compound with CXCR3 antagonist activity, and to novel intermediates useful in the synthesis thereof.
    Type: Application
    Filed: December 16, 2008
    Publication date: May 26, 2011
    Applicant: Schering Corporation
    Inventors: Frank Xing Chen, Timothy D. Cutarelli, Xiayong Fu, Xian Liang, Timothy L. McAllister, Robert K. Orr, Jianguo Yin, Kelvin H. Yong, Man Zhu
  • Publication number: 20100324295
    Abstract: The present invention relates a process for the preparation of a compound of the formula: wherein R1, R2, R6, R9 and R10 are as described herein. The compounds are inhibitors of phosphodiesterase 4 (PDE4).
    Type: Application
    Filed: July 3, 2008
    Publication date: December 23, 2010
    Inventors: Timothy D. Cutarelli, Dimitar L. Filipov, Christopher Stanley Pridgen, Michael R. Reeder, Kelvin H. Yong, Dimitrios N. Zarkadas
  • Publication number: 20100137597
    Abstract: This application discloses a novel process for the preparation of phosphonate esters useful as intermediates in the preparation of himbacine analogs, themselves useful as thrombin receptor antagonists. The chemistry taught herein can be exemplified by the following scheme: wherein R9 is selected from alkyl, aryl heteroaryl and arylalkyl groups having 1 to 10 carbon atoms, and R11 is selected independently for each occurrence from alkyl, aryl heteroaryl and arylalkyl groups having 1 to 10 carbon atoms and hydrogen, X2 is Cl, Br, or I; X3 is selected from Cl and Br; and PdLn is a supported palladium metal catalyst or a soluble heterogeneous palladium catalyst. The L-derivatizing reagent is a moiety which converts the alcohol functional group of compound 137D to any leaving group which can be displaced by a triorgano-phosphite phosphonating agent.
    Type: Application
    Filed: February 5, 2010
    Publication date: June 3, 2010
    Inventors: Kelvin H. Yong, Ilia A. Zavialov, Jianguo Yin, Xiaoyong Fu, Tiruvettipuram K. Thiruvengadam
  • Patent number: 7687631
    Abstract: This application discloses a novel process for the preparation of phosphonate esters useful as intermediates in the preparation of himbacine analogs, themselves useful as thrombin receptor antagonists. The chemistry taught herein can be exemplified by the following scheme: wherein R9 is selected from alkyl, aryl heteroaryl and arylalkyl groups having 1 to 10 carbon atoms, and R11 is selected independently for each occurrence from alkyl, aryl heteroaryl and arylalkyl groups having 1 to 10 carbon atoms and hydrogen, X2 is Cl, Br, or I; X3 is selected from Cl and Br; and PdLn is a supported palladium metal catalyst or a soluble heterogeneous palladium catalyst. The L-derivatizing reagent is a moiety which converts the alcohol functional group of compound 137D to any leaving group which can be displaced by a triorgano-phosphite phosphonating agent.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: March 30, 2010
    Assignee: Schering Corporation
    Inventors: Kelvin H. Yong, Ilia A. Zavialov, Jianguo Yin, Xiaoyong Fu, Tiruvettipuram K. Thiruvengadam