Patents by Inventor Jijun Teng

Jijun Teng 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).

  • Synthetic Method of 20 (S)-Ginsenoside Rh2
    Publication number: 20080275225
    Abstract: A synthetic method of 20(s)-ginsenoside Rh2, that is 20(S)-protopanaxdiol-3-O-?-D-glucopyranoside, is comprised of: protecting protopanaxdiol (A1) selectively first to produce monosubstituted protopanaxdiol (A2); and Glycosidating the monosubstituted protopanaxdiol with Glucopyranosyl donor in the presence of Lewis acid catalyst; Deprotecting the product; Then separating and purifying to obtain 20(s)-ginsenoside Rh2. The method is conducted under mild condition at low cost, and affords product with high stereoselectivity, high yield and purity. Therefore, the synthetic method of the present invention is suitable for production on large scale.
    Type: Application
    Filed: May 16, 2005
    Publication date: November 6, 2008
    Applicants: SHANGHAI INNIVATIVE RESEARCH CENTER OF TRADITIONAL, SHANGHAI PHARMVALLEY CORP.
    Inventors: Yongzheng Hui, Zhiqi Yang, Junyao Liu, Jijun Teng, Huiqin Xie, Jie Zhang