Patents by Inventor Zheng-Yun Zhan

Zheng-Yun Zhan 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).

  • Recyclable ruthenium catalysts for metathesis reactions
    Publication number: 20070043180
    Abstract: The invention relates to novel carbene ligands and their incorporated monomeric and resin/polymer linked ruthenium catalysts, which are recyclable and highly active for olefin metathesis reactions. It is disclosed that significant electronic effect of different substituted 2-alkoxybenzylidene ligands on the catalytic activity and stability of corresponding carbene ruthenium complexes, some of novel ruthenium complexes in the invention can be broadly used as catalysts highly efficient for olefin metathesis reactions, particularly in ring-closing (RCM), ring-opening (ROM), ring-opening metathesis polymerization (ROMP) and cross metathesis (CM) in high yield. The invention also relates to preparation of new ruthenium complexes and the use in metathesis.
    Type: Application
    Filed: July 3, 2006
    Publication date: February 22, 2007
    Applicant: Zheng-Yun James Zhan
    Inventor: Zheng-Yun Zhan
  • Process for preparing intermediates for the synthesis of antifungal agents
    Patent number: 5349099
    Abstract: Disclosed is a process for preparing allylic halides of the formula I ##STR1## wherein X is Cl, Br or I, for use as intermediates in the synthesis of substituted tetrahydrofuran azole anti-fungal agents.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: September 20, 1994
    Assignee: Schering Corporation
    Inventors: Shen-Chun Kuo, Donald Hou, Zheng-Yun Zhan