Patents by Inventor Feijun Wang

Feijun Wang 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).

  • 2,2?,6,6?-tetraoxazolinyl biphenyl ligand and method for preparing the same
    Patent number: 7767825
    Abstract: The present invention relates to a method for preparing 2,2?,6,6?-tetraoxazolinyl biphenyl ligand in chemical industry field. In the present invention, compound (III) is reacted with an activator that can activate the hydroxyl group selected from the group consisting of alkyl halosulfonium compound, aryl halosulfonium compound, phosphoryl chloride, phosphorus pentachloride, thionyl chloride and triphenyl phosphine, in the presence of alkali(s), to give the target product (IV), 2,2?,6,6?-tetraoxazolinyl biphenyl ligand. The ligand of the present invention can be used in various asymmetric reactions catalyzed by metals, with high reactivity and stereoselectivity, and thus represents a good application outlook.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: August 3, 2010
    Assignee: Shanghai Jiaotong University
    Inventors: Wanbin Zhang, Yongjian Zhang, Feijun Wang
  • 5,5?-Position linked 1,1?-biphenyl axial chiral ligand and method for preparing the same
    Patent number: 7754891
    Abstract: The present invention relates to a 5,5?-position linked 1,1?-biphenyl axis chiral ligand in chemical industry field. The present invention incorporates both the central chirality of oxazoline and the axial chirality of diphenyls. Such ligand can be used in various asymmetric reactions catalyzed by metal with high reactivity and stereoselectivity, and thus represents a good application outlook. The ligand of the present invention has the formula of: wherein: n=5, 6, 7, 8, 9, 10, 11 or 12; R1=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R2=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R3=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R4=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: July 13, 2010
    Assignee: Shanghai Jiaotong University
    Inventors: Wanbin Zhang, Yongjian Zhang, Feijun Wang
  • 5,5'- POSITION LINKED 1,1'- BIPHENYL AXIAL CHIRAL LIGAND AND METHOD FOR PREPARING THE SAME
    Publication number: 20090156829
    Abstract: The present invention relates to a 5,5?-position linked 1,1?-biphenyl axis chiral ligand in chemical industry field. The present invention incorporates both the central chirality of oxazoline and the axial chirality of diphenyls. Such ligand can be used in various asymmetric reactions catalyzed by metal with high reactivity and stereoselectivity, and thus represents a good application outlook. The ligand of the present invention has the formula of: wherein: n=5, 6, 7, 8, 9, 10, 11 or 12; R1=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R2=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R3=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl; R4=hydrogen, alkyl, substituted or unsubstituted aryl, substituted or unsubstituted benzyl.
    Type: Application
    Filed: December 29, 2006
    Publication date: June 18, 2009
    Applicant: SHANGHAI JIAOTONG UNIVERSITY
    Inventors: Wanbin Zhang, Yongjian Zhang, Feijun Wang
  • 2,2',6,6' - TETRAOXAZOLINYL BIPHENYL LIGAND AND METHOD FOR PREPARING THE SAME
    Publication number: 20090043104
    Abstract: The present invention relates to a method for preparing 2,2?,6,6?-tetraoxazolinyl biphenyl ligand in chemical industry field. In the present invention, compound (III) is reacted with an activator that can activate the hydroxyl group selected from the group consisting of alkyl halosulfonium compound, aryl halosulfonium compound, phosphoryl chloride, phosphorus pentachloride, thionyl chloride and triphenyl phosphine, in the presence of alkali(s), to give the target product (IV), 2,2?,6,6?-tetraoxazolinyl biphenyl ligand. The ligand of the present invention can be used in various asymmetric reactions catalyzed by metals, with high reactivity and stereoselectivity, and thus represents a good application outlook.
    Type: Application
    Filed: December 29, 2006
    Publication date: February 12, 2009
    Applicant: SHANGHAI JIAOTONG UNIVERSITY
    Inventors: Wanbin Zhang, Yongjian Zhang, Feijun Wang