Patents by Inventor Weizheng Xu

Weizheng Xu 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: 10669274
    Abstract: Disclosed are an azaphenalene-3-one derivative, its preparation method and its application, in the field of pharmaceutical synthesis. The derivative has the following Formula (I), wherein R is H, 2-fluoroethylamino, 2,2,2-trifluoroethylamino, diethylamino, pyrrolidinyl, imidazolyl, piperidinyl, morphinolinyl, 4-methylaminopiperidinyl, 4-dimethylaminopiperidinyl, (1-methylpiperidin-4-yl)methylamino, (1-phenylpiperidin-4-yl)methylamino, (1-benzylpiperidin-4-yl)methylamino, or 7-fluoro-3,4-dihydroisoquinoline-2(1H)-yl. The preparation method of the azaphenalene-3-one derivative is simple, the yield is high, post-treatment is easy, and purity is high. The derivative has high inhibitory activity against PARP enzyme. It establishes a foundation for researching better anti-tumor drugs using PARP inhibitors.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: June 2, 2020
    Assignee: SUZHOU KANGRUN PHARMACEUTICALS INC.
    Inventors: Hao Zhang, Xiaodong Wang, Weiliang Xu, Weizheng Xu
  • Publication number: 20200031828
    Abstract: Disclosed are an azaphenalene-3-one derivative, its preparation method and its application, in the field of pharmaceutical synthesis. The derivative has the following Formula (I), wherein R is H, 2-fluoroethylamino, 2,2,2-trifluoroethylamino, diethylamino, pyrrolidinyl, imidazolyl, piperidinyl, morphinolinyl, 4-methylaminopiperidinyl, 4-dimethylaminopiperidinyl, (1-methylpiperidin-4-yl)methylamino, (1-phenylpiperidin-4-yl)methylamino, (1-benzylpiperidin-4-yl)methylamino, or 7-fluoro-3,4-dihydroisoquinoline-2(1H)-yl. The preparation method of the azaphenalene-3-one derivative is simple, the yield is high, post-treatment is easy, and purity is high. The derivative has high inhibitory activity against PARP enzyme. It establishes a foundation for researching better anti-tumor drugs using PARP inhibitors.
    Type: Application
    Filed: March 31, 2017
    Publication date: January 30, 2020
    Inventors: Hao ZHANG, Xiaodong WANG, Weiliang XU, Weizheng XU
  • Patent number: 10106550
    Abstract: Disclosed are an aza-phenalene-3-ketone derivative, a preparation method thereof and its application as a PARP inhibitor. The aza-phenalene-3-ketone derivative has the following structure: wherein R is hydrogen, methyl, ethyl, isopropyl, benzyl or 3-methyl-3-butenyl. The aza-phenalene-3-ketone derivative has very high activity for inhibiting PARP, thereby providing a good basis for new drug research of developing a nitrogen-doped phenalene-3-ketone compound as PARP inhibitor to treat cancer.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: October 23, 2018
    Assignee: SUZHOU KANGRUN PHARMACEUTICALS INC.
    Inventors: Yuping Chu, Weiliang Xu, Ling Wang, Weizheng Xu
  • Publication number: 20180248504
    Abstract: A brush-less DC motor control device includes a position detecting unit that detects the position of a motor rotor and acquires the position signals of the rotor, a reference generating unit that selects a reference time moment according to the rotor's position signal, a current measuring unit that measures the phase current of the motor and acquires the phase current at the reference time moment according to the measured phase current, a calculation unit that calculates the direct axis current of the motor according to the acquired phase current, a phase adjusting unit that adjusts the phase of the drive voltage of a motor coil according to the difference value between the direct axis current of the motor and an expected target current, and a drive unit that outputs drive signals of the motor coil according to the acquired position signal and the phase of the coil's drive voltage.
    Type: Application
    Filed: April 12, 2017
    Publication date: August 30, 2018
    Applicant: INTERNATIONAL GREEN CHIP (TIANJIN) CO., LTD.
    Inventors: Jianhui LIN, Weixin ZHANG, Weizheng XU
  • Publication number: 20180134722
    Abstract: Disclosed are an aza-phenalene-3-ketone derivative, a preparation method thereof and its application as a PARP inhibitor. The aza-phenalene-3-ketone derivative has the following structure: wherein R is hydrogen, methyl, ethyl, isopropyl, benzyl or 3-methyl-3-butenyl. The aza-phenalene-3-ketone derivative has very high activity for inhibiting PARP, thereby providing a good basis for new drug research of developing a nitrogen-doped phenalene-3-ketone compound as PARP inhibitor to treat cancer.
    Type: Application
    Filed: May 4, 2016
    Publication date: May 17, 2018
    Inventors: Yuping CHU, Weiliang XU, Ling WANG, Weizheng XU
  • Publication number: 20150141429
    Abstract: The present invention relates to tetraaza phenalen-3-one compounds which inhibit poly (ADP-ribose) polymerase (PARP) and are useful in the chemosensitization of cancer therapeutics. The induction of peripheral neuropathy is a common side-effect of many of the conventional and newer chemotherapies. The present invention further provides means to reliably prevent or cure chemotherapy-induced neuropathy. The invention also relates to the use of the disclosed PARP inhibitor compounds in enhancing the efficacy of chemotherapeutic agents such as temozolomide. The invention also relates to the use of the disclosed PARP inhibitor compounds to radiosensitize tumor cells to ionizing radiation. The invention also relates to the use of the disclosed PARP inhibitor compounds for treatment of cancers with DNA repair defects.
    Type: Application
    Filed: November 11, 2014
    Publication date: May 21, 2015
    Applicant: EISAI INC.
    Inventors: Weizheng XU, Greg Delahanty, Ling Wei, Jie Zhang
  • Patent number: 8894989
    Abstract: The present invention relates to tetraaza phenalen-3-one compounds which inhibit poly(ADP-ribose) polymerase (PARP) and are useful in the chemosensitization of cancer therapeutics. The induction of peripheral neuropathy is a common side-effect of many of the conventional and newer chemotherapies. The present invention further provides means to reliably prevent or cure chemotherapy-induced neuropathy. The invention also relates to the use of the disclosed PARP inhibitor compounds in enhancing the efficacy of chemotherapeutic agents such as temozolomide. The invention also relates to the use of the disclosed PARP inhibitor compounds to radiosensitize tumor cells to ionizing radiation. The invention also relates to the use of the disclosed PARP inhibitor compounds for treatment of cancers with DNA repair defects.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: November 25, 2014
    Assignee: Eisai Inc.
    Inventors: Weizheng Xu, Greg Delahanty, Ling Wei, Jie Zhang
  • Patent number: 8883787
    Abstract: The present invention relates to diazabenzo[de]anthracen-3-one compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: November 11, 2014
    Assignee: Eisai Inc.
    Inventors: Weizheng Xu, Greg Delahanty, Jie Zhang
  • Publication number: 20130345225
    Abstract: The present invention relates to diazabenzo[de]anthracen-3-one compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Application
    Filed: June 10, 2013
    Publication date: December 26, 2013
    Applicant: Eisai Inc.
    Inventors: Weizheng XU, Greg Delahanty, jIE ZHANG
  • Patent number: 8470825
    Abstract: The present invention relates to diazabenzo[de]anthracen-3-one compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: June 25, 2013
    Assignee: Eisai Inc.
    Inventors: Weizheng Xu, Greg Delahanty, Jie Zhang
  • Publication number: 20130011365
    Abstract: The present invention relates to tetraaza phenalen-3-one compounds which inhibit poly (ADP-ribose) polymerase (PARP) and are useful in the chemosensitization of cancer therapeutics. The induction of peripheral neuropathy is a common side-effect of many of the conventional and newer chemotherapies. The present invention further provides means to reliably prevent or cure chemotherapy-induced neuropathy. The invention also relates to the use of the disclosed PARP inhibitor compounds in enhancing the efficacy of chemotherapeutic agents such as temozolomide. The invention also relates to the use of the disclosed PARP inhibitor compounds to radio sensitize tumor cells to ionizing radiation. The invention also relates to the use of the disclosed PARP inhibitor compounds for treatment of cancers with DNA repair defects.
    Type: Application
    Filed: June 19, 2012
    Publication date: January 10, 2013
    Applicant: EISAI INC.
    Inventors: Weizheng XU, Greg Delahanty, Ling Wei, Jie Zhang
  • Publication number: 20120309717
    Abstract: The present invention provides compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Application
    Filed: February 1, 2012
    Publication date: December 6, 2012
    Applicant: EISAI INC.
    Inventors: Vincent J. Kalish, Jie Zhang, Weizheng Xu, Jia-He Li, Amy Dongxia Xing, Qun Liu
  • Patent number: 8236802
    Abstract: The present invention relates to tetraaza phenalen-3-one compounds which inhibit poly (ADP-ribose) polymerase (PARP) and are useful in the chemosensitization of cancer therapeutics. The induction of peripheral neuropathy is a common side-effect of many of the conventional and newer chemotherapies. The present invention further provides means to reliably prevent or cure chemotherapy-induced neuropathy. The invention also relates to the use of the disclosed PARP inhibitor compounds in enhancing the efficacy of chemotherapeutic agents such as temozolomide. The invention also relates to the use of the disclosed PARP inhibitor compounds to radiosensitize tumor cells to ionizing radiation. The invention also relates to the use of the disclosed PARP inhibitor compounds for treatment of cancers with DNA repair defects.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: August 7, 2012
    Assignee: Eisai Inc.
    Inventors: Weizheng Xu, Greg Delahanty, Ling Wei, Jie Zhang
  • Publication number: 20120115873
    Abstract: The present invention relates to diazabenzo[de]anthracen-3.-onei compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Application
    Filed: September 27, 2011
    Publication date: May 10, 2012
    Applicant: EISAI INC.
    Inventors: Weizheng XU, Greg Delahanty, Jie Zhang
  • Patent number: 8129382
    Abstract: The present invention provides compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: March 6, 2012
    Assignee: Eisai Inc.
    Inventors: Vincent Kalish, Jie Zhang, Weizheng Xu, Jia-He Li, Amy D. Xing, Qun Liu
  • Patent number: 8058275
    Abstract: The present invention relates to diazabenzo[de]anthracen-3-one compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: November 15, 2011
    Assignee: Eisai Inc.
    Inventors: Weizheng Xu, Greg Delahanty, Jie Zhang
  • Publication number: 20110092478
    Abstract: The present invention relates to diazabenzo[de]anthracen-3-one compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Application
    Filed: October 22, 2010
    Publication date: April 21, 2011
    Applicant: Eisai Inc.
    Inventors: Weizheng Xu, Greg Delahanty, Jie Zhang
  • Patent number: 7820668
    Abstract: The present invention relates to diazabenzo[de]anthracen-3-one compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: October 26, 2010
    Assignee: Eisai Inc.
    Inventors: Weizheng Xu, Greg Delahanty, Jie Zhang
  • Publication number: 20100256095
    Abstract: The present invention provides compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Application
    Filed: June 18, 2010
    Publication date: October 7, 2010
    Applicant: Eisai Inc.
    Inventors: Vincent J. Kalish, Jie Zhang, Weizheng Xu, Jia-He Li, Amy Dongxia Xing, Qun Liu
  • Patent number: 7750008
    Abstract: The present invention provides compounds which inhibit poly(ADP-ribose) polymerase (“PARP”), compositions containing these compounds and methods for using these PARP inhibitors to treat, prevent and/or ameliorate the effects of the conditions described herein.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: July 6, 2010
    Assignee: Eisai Inc.
    Inventors: Vincent Kalish, Jie Zhang, Weizheng Xu, Jia-He Li, Amy D. Xing, Qun Liu