Patents by Inventor Wee Chuan Yeo

Wee Chuan Yeo 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).

  • METHOD OF PRODUCING AN OPTICALLY ACTIVE CYANOHYDRIN DERIVATIVE
    Publication number: 20100179343
    Abstract: The present invention relates to a method of producing an optically active cyanohydrin derivative, which comprises reacting an aldehyde or an asymmetrical ketone with a cyanating agent in the presence of a Lewis base and a titanium compound produced from a partial hydrolysate of titanium tetraalkoxide and an optically active ligand represented by formula (II) or a titanium oxoalkoxide compound represented by formula (I) [TixOy](OR1)4x-2y, and an optically active ligand represented by formula (II), wherein R1 is an optionally substituted alkyl group or an optionally substituted aryl group; x is an integer of not less than 2; y is an integer of not less than 1; and y/x satisfies 0.1<y/x?1.
    Type: Application
    Filed: March 29, 2007
    Publication date: July 15, 2010
    Applicants: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, MITSUI CHEMICALS, INC.
    Inventors: Wee Chuan Yeo, L. L. Christina Chai, Selvasothi Selvaratnam, Takushi Nagata, Kasuhiko Yoshinaga