Patents by Inventor Douxing LEI

Douxing LEI 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).

  • DIHYDROPYRIMIDINE COMPOUND AND APPLICATION THEREOF AS DRUG
    Publication number: 20220194951
    Abstract: A dihydropyrimidine compound and application thereof as a drug, in particular, application as a drug for treating and preventing hepatitis B. Specifically, a compound represented by general formula (I) or (Ia) or a stereoisomer, a tautomer, an oxynitride, a solvate, a metabolite, a pharmaceutically acceptable salt or a prodrug thereof, wherein variables are as defined in the description. Use of the compound represented by general formula (I) or (Ia) or the stereoisomer, the tautomer, the oxynitride, the solvate, the metabolite, or the pharmaceutically acceptable salt thereof as a drug, in particular use as a drug for treating and preventing hepatitis B.
    Type: Application
    Filed: April 29, 2020
    Publication date: June 23, 2022
    Applicant: SUNSHINE LAKE PHARMA CO., LTD.
    Inventors: Qingyun REN, Yingjun ZHANG, Xinchang LIU, Siegfried GOLDMANN, Guanghua YAN, Meng WANG, Douxing LEI, Feng LI
  • Processes for preparing dihydropyrimidine derivatives and intermediates thereof
    Patent number: 9643962
    Abstract: The present invention refers to processes for preparing a dihydropyrimidine compound having Formula (I), or a tautomer thereof having Formula (Ia), as well as a intermediate thereof. The process of the invention has simple operation, high optical purity of product, high yield and convenient work-up, which is suitable for industrial production.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: May 9, 2017
    Assignee: SUNSHINE LAKE PHARMA CO., LTD.
    Inventors: Qingyun Ren, Xinchang Liu, Zhifu Zou, Linjin Tu, Yuefeng Shan, Douxing Lei, Siegfried Goldmann, Yingjun Zhang
  • PROCESSES FOR PREPARING DIHYDROPYRIMIDINE DERIVATIVES AND INTERMEDIATES THEREOF
    Publication number: 20160264563
    Abstract: The present invention refers to processes for preparing a dihydropyrimidine compound having Formula (I), or a tautomer thereof having Formula (Ia), as well as a intermediate thereof. The process of the invention has simple operation, high optical purity of product, high yield and convenient work-up, which is suitable for industrial production.
    Type: Application
    Filed: November 27, 2014
    Publication date: September 15, 2016
    Applicant: SUNSHINE LAKE PHARMA CO., LTD.
    Inventors: Qingyun REN, Xinchang LIU, Zhifu ZOU, Linjin TU, Yuefeng SHAN, Douxing LEI, Slegfried GOLDMANN, Yingjun ZHANG