Patents by Inventor Pixu Li

Pixu Li 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).

  • Patent number: 11926633
    Abstract: The present disclosure relates to a JAK inhibitor upadacitinib intermediate and a preparation method therefor, and to a preparation method for a JAK inhibitor upadacitinib. The upadacitinib intermediate of the present application is as shown in Formula (II) or Formula (III), wherein, R is a protective group of nitrogen atoms, and R1 is an open-chain or cyclic amine group. Compared with the prior art, the method for the synthesis of upadacitinib of the present application, significantly reduces cost, is environmentally-friendly. And the quality of the final product is well controlled.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: March 12, 2024
    Assignee: SUZHOU PENGXU PHARMATECH CO., LTD
    Inventors: Peng Wang, Pixu Li, Qiang Wei, Wen Cheng, Hao Wu
  • Publication number: 20230183180
    Abstract: A process of making Roxadustat of the following formula: comprising converting a compound of formula VI: to Roxadustat, wherein R is a C1-C20 alkyl group, and PG is a protective group.
    Type: Application
    Filed: June 4, 2021
    Publication date: June 15, 2023
    Applicant: SUZHOU PENGXU PHARMATECH CO., LTD.
    Inventors: Peng WANG, Pixu LI, Hailong YANG, Qiang WEI
  • Patent number: 11673862
    Abstract: The present invention provides a scalable synthesis of enantiomerically pure brivaracetam, and related derivatives.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: June 13, 2023
    Assignee: SUZHOU PENGXU PHARMATECH CO. LTD.
    Inventors: Peng Wang, Pixu Li, Qiang Wei, Yuanhua Liu
  • Publication number: 20220235094
    Abstract: The present application relates to crystalline form 04, crystalline form 06, crystalline form D-1, and crystalline form D-2 of an antidepressant drug SAGE-217 and a preparation method therefor and a pharmaceutical composition containing same. The crystalline form 04 has an XRPD pattern with characteristic peaks at 2theta values of 11.6±0.2°, 13.5±0.2°, 16.2±0.2°, 16.5±0.2°, and 23.2±0.2°; the crystalline form 06 has an XRPD pattern with characteristic peaks at 2theta values of 8.7±0.2°, 10.0±0.2°, 13.2±0.2°, 15.0±0.2°, 15.8±0.2°, and 17.3±0.2°; the crystalline form D-1 has an XRPD pattern with characteristic peaks at 2theta values of 7.2±0.2°, 8.6±0.2°, 13.3±0.2°, 19.6±0.2°, and 23.0±0.2°; and the crystalline form D-2 has an XRPD pattern with characteristic peaks at 2theta values of 7.3±0.2°, 8.6±0.2°, 13.4±0.2°, 19.7±0.2°, and 23.3±0.2°. The novel crystalline forms provided by the present application have good stability, and provide more choices for drug development.
    Type: Application
    Filed: January 19, 2020
    Publication date: July 28, 2022
    Inventors: Peng WANG, Pixu LI, Siping CHEN
  • Patent number: 11377426
    Abstract: The present invention relates to a scalable process for the making of elagolix, its salts and the process of intermediate compounds.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: July 5, 2022
    Assignee: SUZHOU PENGXU PHARMATECH CO., LTD.
    Inventors: Pixu Li, Peng Wang, Xiangyong Gu, Hailong Yang, Zhong Wang, Qianghua Jiang, Yuanhua Liu, Hui Xia
  • Publication number: 20220041611
    Abstract: The present application provides a upadacitinib salt compound and a preparation method therefor. The salt involved in the method in the present application has an easy preparation operation, a cheap raw material easy to get, and a good purification effect on upadacitinib, and is beneficial to industrial production.
    Type: Application
    Filed: May 8, 2020
    Publication date: February 10, 2022
    Inventors: Peng WANG, Pixu LI, Qiang WEI, Wen CHENG
  • Patent number: 11161851
    Abstract: The present invention relates to a method for preparing the compound of formula IV, compound of formula XI, and acalabrutinib, a new generation of bruton tyrosine kinase (BTK) inhibitor.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: November 2, 2021
    Assignee: Suzhou PengXu Pharmatech Co. Ltd.
    Inventors: Peng Wang, Pixu Li, Xiangyong Gu, Yadong Ge, Zhong Wang, Feng Gao, Qiangqiang Du
  • Publication number: 20210323971
    Abstract: The present disclosure relates to a JAK inhibitor upadacitinib intermediate and a preparation method therefor, and to a preparation method for a JAK inhibitor upadacitinib. The upadacitinib intermediate of the present application is as shown in Formula (II) or Formula (III), wherein, R is a protective group of nitrogen atoms, and R1 is an open-chain or cyclic amine group. Compared with the prior art, the method for the synthesis of upadacitinib of the present application, significantly reduces cost, is environmentally-friendly. And the quality of the final product is well controlled.
    Type: Application
    Filed: August 26, 2019
    Publication date: October 21, 2021
    Inventors: Peng WANG, Pixu LI, Qiang WEI, Wen CHENG, Hao WU
  • Publication number: 20210253567
    Abstract: The present invention relates to amorphous and crystalline forms of valbenazine salt and the methods for their preparation.
    Type: Application
    Filed: August 13, 2019
    Publication date: August 19, 2021
    Inventors: Peng WANG, Pixu LI, Qiang WEI, Dingquan LIU, Hao WU, He CHEN, Wenhui YAO
  • Publication number: 20210214318
    Abstract: The present invention relates to a scalable process for the making of elagolix, its salts and the process of intermediate compounds.
    Type: Application
    Filed: December 3, 2018
    Publication date: July 15, 2021
    Applicant: SUZHOU PENGXU PHARMATECH CO., LTD.
    Inventors: Pixu LI, Peng WANG, Xiangyong GU, Hailong YANG, Zhong WANG, Qianghua JIANG, Yuanhua LIU, Hui XIA
  • Publication number: 20200354368
    Abstract: The present invention relates to a method for preparing the compound of formula IV, compound of formula XI, and acalabrutinib, a new generation of bruton tyrosine kinase (BTK) inhibitor.
    Type: Application
    Filed: November 5, 2018
    Publication date: November 12, 2020
    Applicant: SUZHOU PENGXU PHARMATECH CO., LTD.
    Inventors: Peng WANG, Pixu LI, Xiangyong GU, Yadong GE, Zhong WANG, Feng GAO, Qiangqiang DU
  • Patent number: 10351536
    Abstract: Novel crystalline forms of lesinurad and its sodium salt, processes for their preparation, pharmaceutical compositions comprising these new forms, and use of them for treating or delaying progression or onset of diseases or disorders related to activity of uric acid transporter 1 (URAT1) proteins are disclosed. These novel forms were characterized by X-ray powder diffraction, differential scanning calorimetry, and other techniques. They can be readily prepared and are suitable for preparation of solid dosage forms owing to their ease of handling and superior pharmacological properties.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: July 16, 2019
    Assignees: Crystal Pharmatech Co., Ltd., Suzhou Pengxu Pharmatech Co., Ltd.
    Inventors: Minhua Chen, Yanfeng Zhang, Chaohui Yang, Xiaoyu Zhang, Peng Wang, Pixu Li
  • Publication number: 20190152909
    Abstract: The present invention provides a scalable synthesis of enantiomerically pure brivaracetam, and related derivatives.
    Type: Application
    Filed: January 24, 2019
    Publication date: May 23, 2019
    Applicant: ESTEVE QUIMlCA S.A.
    Inventors: Peng WANG, Pixu LI, Qiang WEI, Yuanhua LIU
  • Publication number: 20190152908
    Abstract: The present invention provides a scalable synthesis of enantiomerically pure brivaracetam, and related derivatives.
    Type: Application
    Filed: January 24, 2019
    Publication date: May 23, 2019
    Applicant: ESTEVE QUIMlCA S.A.
    Inventors: Peng WANG, Pixu LI, Qiang WEI, Yuanhua LIU
  • Patent number: 10221134
    Abstract: The present invention provides a scalable synthesis of enantiomerically pure brivaracetam, and related derivatives.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: March 5, 2019
    Assignee: Esteve Quimica S.A.
    Inventors: Peng Wang, Pixu Li, Qiang Wei, Yuanhua Liu
  • Publication number: 20180155284
    Abstract: The present invention provides a scalable synthesis of enantiomerically pure brivaracetam, and related derivatives.
    Type: Application
    Filed: May 24, 2016
    Publication date: June 7, 2018
    Inventors: Peng WANG, Pixu LI, Qiang WEI, Yuanhua LIU
  • Patent number: 9969701
    Abstract: Novel salts and cocrystals of lesinurad, processes for their preparation, pharmaceutical compositions comprising these new salt forms and co-crystals, and use of them for treating or delaying progression or onset of diseases or disorders related to activity of uric acid transport 1 (URAT1) proteins are disclosed. These novel forms were characterized by X-ray powder diffraction, differential scanning calorimetry, and other techniques. They can be readily prepared and are suitable for preparation of solid dosage forms owing to their ease of handling and superior pharmacological properties.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: May 15, 2018
    Assignees: Crystal Pharmatech Co., Ltd., Suzhou Pengxu Pharmatech Co., Ltd.
    Inventors: Minhua Chen, Yanfeng Zhang, Chaohui Yang, Xiaoyu Zhang, Peng Wang, Pixu Li
  • Patent number: 9957240
    Abstract: Novel crystalline Forms of trisodium [3-((1S,3R)-1-biphenyl-4-ylmethyl-3-ethoxycarbonyl-1-butyl carbamoyl) propionate-(S)-3?-methyl-T-(pentanoyl{2?-(tetrazol-5-ylate)biphenyl-4?-ylmethyl}amino)butyrate] hydrate, methods for their preparation, pharmaceutical compositions comprising these new forms, and use of them for treating or delaying progression or onset of diseases or disorders related to activity of angiotensin receptor 1 (AT1) blockage and neprilysin (NEP) inhibition, such as heart failure, are disclosed.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: May 1, 2018
    Assignees: CRYSTAL PHARMATECH CO., LTD, SUZHOU PENGXU PHARMATECH CO., LTD.
    Inventors: Minhua Chen, Yanfeng Zhang, Chaohui Yang, Xiaoyu Zhang, Jiaoyang Li, Peng Wang, Pixu Li
  • Publication number: 20170362189
    Abstract: Novel crystalline Forms of trisodium [3-((1S,3R)-1-biphenyl-4-ylmethyl-3-ethoxycarbonyl-1-butyl carbamoyl) propionate-(S)-3?-methyl-T-(pentanoyl{2?-(tetrazol-5-ylate)biphenyl-4?-ylmethyl}amino)butyrate] hydrate, methods for their preparation, pharmaceutical compositions comprising these new forms, and use of them for treating or delaying progression or onset of diseases or disorders related to activity of angiotensin receptor 1 (AT1) blockage and neprilysin (NEP) inhibition, such as heart failure, are disclosed.
    Type: Application
    Filed: December 8, 2015
    Publication date: December 21, 2017
    Applicants: CRYSTAL PHARMATECH CO., LTD, SUZHOU PENGXU PHARMATECH CO., LTD.
    Inventors: Minhua CHEN, Yanfeng ZHANG, Chaohui YANG, Xiaoyu ZHANG, Jiaoyang LI, Peng WANG, Pixu LI
  • Patent number: 9751889
    Abstract: Crystalline Form I of ibrutinib, processes for its preparation, pharmaceutical compositions comprising the new Form, and use of Form I of ibrutinib for treating or delaying diseases or disorders related to activity of Bruton's tyrosine kinase (BTK) proteins are disclosed. The novel Form was characterized by X-ray powder diffraction, differential scanning calorimetry, and other techniques. It can be readily prepared and is suitable for use in the preparation of solid dosage forms.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: September 5, 2017
    Assignees: Crystal Pharmatech Inc., Suzhou Pengxu Pharmatech Co., Ltd.
    Inventors: Minhua Chen, Yanfeng Zhang, Chaohui Yang, Xiaoyu Zhang, Peng Wang, Pixu Li, Fei Lu, Heng Ge