Patents by Inventor Takashi Kawasuji

Takashi Kawasuji 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).

  • Publication number: 20170066754
    Abstract: The present invention provides an integrase inhibitor. The inventors have found the following compound of formula (I) possessing an integrase inhibitory activity. (wherein, RC and RD taken together with the neighboring carbon atoms form a ring which may be a condensed ring, Y is hydroxyl, mercapto or amino; Z is O, S or NH; RA is a group shown by (wherein, C ring is N-containing aromatic heterocycle) or the like).
    Type: Application
    Filed: November 18, 2016
    Publication date: March 9, 2017
    Applicant: SHIONOGI & CO., LTD.
    Inventors: Ryuichi KIYAMA, Yasuhiko KANDA, Yukio TADA, Toshio FUJISHITA, Takashi KAWASUJI, Shozo TAKECHI, Masahiro FUJI
  • Patent number: 9572813
    Abstract: The present invention provides an integrase inhibitor. The inventors have found the following compound of formula (I) possessing an integrase inhibitory activity. (wherein, RC and RD taken together with the neighboring carbon atoms form a ring which may be a condensed ring, Y is hydroxyl, mercapto or amino; Z is O, S or NH; RA is a group shown by (wherein, C ring is N-containing aromatic heterocycle) or the like).
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: February 21, 2017
    Assignee: Shionogi & Co., Ltd.
    Inventors: Ryuichi Kiyama, Yasuhiko Kanda, Yukio Tada, Toshio Fujishita, Takashi Kawasuji, Shozo Takechi, Masahiro Fuji
  • Publication number: 20170029438
    Abstract: The present invention is to provide a novel compound (I) shown below, having the anti-virus activity, particularly the HIV integrase inhibitory activity, and a drug containing the same, particularly an anti-HIV drug, as well as a process and an intermediate thereof. (wherein Z1 is NR4; R1 is hydrogen or lower alkyl; X is a single bond, a hetero atom group selected from O, S, SO, SO2 and NH, or lower alkylene or lower alkenylene in which the hetero atom group may intervene; R2 is optionally substituted aryl; R3 is hydrogen, a halogen, hydroxy, optionally substituted lower alkyl etc; and R4 and Z2 part taken together forms a ring, to form a polycyclic compound, including e.g., a tricyclic or tetracyclic compound.
    Type: Application
    Filed: October 11, 2016
    Publication date: February 2, 2017
    Applicants: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Brian A. JOHNS, Takashi KAWASUJI, Teruhiko TAISHI, Yoshiyuki TAODA
  • Publication number: 20160304535
    Abstract: The present invention is to provide a novel compound (I) shown below, having the anti-virus activity; particularly the HIV integrase inhibitory activity, and a drug containing the same, particularly an anti-HIV drug, as well as a process and an intermediate thereof. (wherein Z1 is NR1; R1 is hydrogen or lower alkyl; X is a single bond, a hetero atom group selected from O, S, SO, SO2 and NH, or lower alkylene or lower alkenylene in which the hetero atom group may intervene; R2 is optionally substituted aryl; R3 is hydrogen, a halogen, hydroxy, optionally substituted lower alkyl etc; and R4 and Z2 part taken together forms a ring, to forma polycyclic compound, including e.g., a tricyclic or tetracyclic compound.
    Type: Application
    Filed: June 29, 2016
    Publication date: October 20, 2016
    Applicants: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Brian A. JOHNS, Takashi KAWASUJI, Teruhiko TAISHI, Yoshiyuki TAODA
  • Publication number: 20160207939
    Abstract: The present invention is to provide a novel compound (I) shown below, having the anti-virus activity; particularly the HIV integrase inhibitory activity, and a drug containing the same, particularly an anti-HIV drug, as well as a process and an intermediate thereof. (wherein Z1 is NR4; R1 is hydrogen or lower alkyl; X is a single bond, a hetero atom group selected from O, S, SO, SO2 and NH, or lower alkylene or lower alkenylene in which the hetero atom group may intervene; R2 is optionally substituted aryl; R3 is hydrogen, a halogen, hydroxy, optionally substituted lower alkyl etc; and R4 and Z2 part taken together forms a ring, to form a polycyclic compound, including e.g., a tricyclic or tetracyclic compound.
    Type: Application
    Filed: March 31, 2016
    Publication date: July 21, 2016
    Applicants: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Brian A. JOHNS, Takashi KAWASUJI, Teruhiko TAISHI, Yoshiyuki TAODA
  • Patent number: 9365587
    Abstract: The invention is a process for the preparation of a compound of the following formula (I): wherein R is —CHO, —CH(OH)2 or —CH(OH)(OR4); P1 is H or a hydroxyl protecting group; P3 is H or a carboxy protecting group; R3 is H, halogen, hydroxy, optionally substituted lower alkyl, optionally substituted cycloalkyl, etc.; Rx is H, halogen or R2—X—NR1—C(O)—; etc. as defined in the specification. The compounds are useful as intermediates in synthesizing compounds having HIV integrase inhibitory activity.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: June 14, 2016
    Assignees: SHIONOGI & CO., LTD., ViiV HEALTHCARE COMPANY
    Inventors: Hiroshi Yoshida, Yoshiyuki Taoda, Brian Alvin Johns, Takashi Kawasuji, Daiki Nagamatsu
  • Publication number: 20160137666
    Abstract: The present invention is to provide a novel compound (I) shown below, having the anti-virus activity, particularly the HIV integrase inhibitory activity, and a drug containing the same, particularly an anti-HIV drug, as well as a process and an intermediate thereof. (wherein Z1 is NR4; R1 is hydrogen or lower alkyl; X is a single bond, a hetero atom group selected from O, S, SO, SO2 and NH, or lower alkylene or lower alkenylene in which the hetero atom group may intervene; R2 is optionally substituted aryl; R3 is hydrogen, a halogen, hydroxy, optionally substituted lower alkyl etc; and R4 and Z2 part taken together forms a ring, to form a polycyclic compound, including e.g., a tricyclic or tetracyclic compound.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 19, 2016
    Applicants: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Brian Alvin Johns, Takashi Kawasuji, Teruhiko Taishi, Yoshiyuki Taoda
  • Publication number: 20160060274
    Abstract: A synthesis approach providing an early ring attachment via a bromination to compound l-l yielding compound II-Il, whereby a final product such as AA can be synthesized. In particular, the 2,4-difluorophenyl-containing sidechain is attached before creation of the additional ring Q.
    Type: Application
    Filed: November 10, 2015
    Publication date: March 3, 2016
    Applicants: VIIV HEALTHCARE COMPANY, SHIONOGI & CO., LTD.
    Inventors: Hiroshi YOSHIDA, Yoshiyuki TAODA, Brian Alvin JOHNS, Takashi KAWASUJI, Daiki NAGAMATSU
  • Patent number: 9273065
    Abstract: The present invention is directed to a class of substituted pyrido[1?2?:4,5]pyrazino[1,2-a]-pyrimidines useful as intermediates in the production of anti-HIV agents. The compounds have the formula (I-24b): wherein Re is one or two halogen; Rz is C1-8alkyl; Rz is hydrogen, C3-6cycloalkyl, heterocyclyl, or C1-8alkyl optionally substituted with hydroxy, C3-6cycloalkyl, alkoxy, heterocyclyl, heteroaryl, C6-14aryl, or amino, wherein said amino may be optionally substituted with —C(O)C1-8alkyl or C1-8alkyl; and P1 is C6-14arylC1-8alkyl; or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: March 1, 2016
    Assignees: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Brian A. Johns, Takashi Kawasuji, Teruhiko Taishi, Yoshiyuki Taoda
  • Patent number: 9242986
    Abstract: A synthesis approach providing an early ring attachment via a bromination to compound 1-1 yielding compound II-II, whereby a final product such as AA can be synthesized. In particular, the 2,4-difluorophenyl-containing sidechain is attached before creation of the additional ring Q.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: January 26, 2016
    Assignees: SHIONOGI & CO., LTD., ViiV Healthcare Company
    Inventors: Takashi Kawasuji, Daiki Nagamatsu
  • Publication number: 20150361093
    Abstract: The present invention provides a novel compound having an antiviral activity, in particular, an HIV replication inhibiting activity, as well as a pharmaceutical composition, in particular, an anti-HIV agent. wherein ring A is substituted or unsubstituted carbocycle or substituted or unsubstituted heterocycle; R1 is substituted or unsubstituted alkyl etc.; R2 is substituted or unsubstituted alkyloxy etc.; n is 1 or 2; R3 is substituted or unsubstituted carbocyclyl or substituted or unsubstituted heterocyclyl; R4 is a hydrogen atom etc.; R6 is substituted or unsubstituted alkyl etc.
    Type: Application
    Filed: January 30, 2014
    Publication date: December 17, 2015
    Applicant: Shionogi & Co., Ltd.
    Inventors: Kenji TOMITA, Yoshiyuki TAODA, Tsutomu IWAKI, Takashi KAWASUJI, Toshiyuki AKIYAMA, Shuichi SUGIYAMA, Yoshinori TAMURA, Masafumi IWATSU
  • Publication number: 20150232479
    Abstract: The present invention is to provide a novel compound (I) shown below, having the anti-virus activity; particularly the HIV integraso inhibitory activity, and a drug containing the same, particularly an anti-HIV drug, as well as a process and an intermediate thereof. (wherein Z1 is NR4; R1 is hydrogen or lower alkyl; X is a single bond, a hetero atom group selected from O, S, SO, SO2 and NH, or lower alkylene or lower alkenylene in which the hetero atom group may intervene; R2 is optionally substituted aryl; R3 is hydrogen, a halogen, hydroxy, optionally substituted lower alkyl etc; and R4 and Z2 part taken together forms a ring, to form a polycyclic compound, including e.g., a tricyclic or tetracyclic compound.
    Type: Application
    Filed: April 30, 2015
    Publication date: August 20, 2015
    Inventors: Brian A. JOHNS, Takashi KAWASUJI, Teruhiko TAISHI, Yoshiyuki TAODA
  • Publication number: 20150225399
    Abstract: The present invention features compounds that are HIV integrase inhibitors and therefore are useful in the inhibition of HIV replication, the prevention and/or treatment of infection by HIV, and in the treatment of AIDS and/or ARC.
    Type: Application
    Filed: April 27, 2015
    Publication date: August 13, 2015
    Inventors: Brian Alvin JOHNS, Eric Eugene BOROS, Takashi KAWASUJI, Cecilia S. KOBLE, Noriyuki KUROSE, Hitoshi MURAI, Ronald George SHERRILL, Jason G. WEATHERHEAD
  • Publication number: 20150202208
    Abstract: The present invention provides an integrase inhibitor. The inventors have found the following compound of formula (I) possessing an integrase inhibitory activity. (wherein, RC and RD taken together with the neighboring carbon atoms form a ring which may be a condensed ring, Y is hydroxyl, mercapto or amino; Z is O, S or NH; RA is a group shown by (wherein, C ring is N-containing aromatic heterocycle) or the like).
    Type: Application
    Filed: January 23, 2015
    Publication date: July 23, 2015
    Inventors: Ryuichi KIYAMA, Yasuhiko KANDA, Yukio TADA, Toshio FUJISHITA, Takashi KAWASUJI, Shozo TAKECHI, Masahiro FUJI
  • Patent number: 9051337
    Abstract: The present invention is to provide a novel compound (I) shown below, having the anti-virus activity; particularly the HIV integrase inhibitory activity, and a drug containing the same, particularly an anti-HIV drug, as well as a process and an intermediate thereof. (wherein Z1 is NR4; R1 is hydrogen or lower alkyl; X is a single bond, a hetero atom group selected from O, S, SO, SO2 and NH, or lower alkylene or lower alkenylene in which the hetero atom group may intervene; R2 is optionally substituted aryl; R3 is hydrogen, a halogen, hydroxy, optionally substituted lower alkyl etc; and R4 and Z2 part taken together forms a ring, to form a polycyclic compound, including e.g., a tricyclic or tetracyclic compound.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: June 9, 2015
    Assignees: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Brian A. Johns, Takashi Kawasuji, Teruhiko Taishi, Yoshiyuki Taoda
  • Publication number: 20140256713
    Abstract: The present invention features compounds that are HIV integrase inhibitors and therefore are useful in the inhibition of HIV replication, the prevention and/or treatment of infection by HIV, and in the treatment of AIDS and/or ARC.
    Type: Application
    Filed: February 21, 2014
    Publication date: September 11, 2014
    Applicants: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Brian Alvin JOHNS, Eric Eugene BOROS, Takashi KAWASUJI, Cecilia S. KOBLE, Noriyuki KUROSE, Hitoshi MURAI, Ronald George SHERRILL, Jason Gordon WEATHERHEAD
  • Publication number: 20140243521
    Abstract: A synthesis approach providing an early ring attachment via a bromination to compound 1-1 yielding compound II-I1, whereby a final product such as AA can be synthesized. In particular, the 2,4-difluorophenyl-containing sidechain is attached before creation of the additional ring Q.
    Type: Application
    Filed: May 8, 2014
    Publication date: August 28, 2014
    Applicants: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Hiroshi YOSHIDA, Yoshiyuki TAODA, Brian Alvin JOHNS, Takashi KAWASUJI, Daiki NAGAMATSU
  • Publication number: 20140200209
    Abstract: The present invention is to provide a novel compound (I) shown below, having the anti-virus activity; particularly the HIV integrase inhibitory activity, and a drug containing the same, particularly an anti-HIV drug, as well as a process and an intermediate thereof. (wherein Z1 is NR4; R1 is hydrogen or lower alkyl; X is a single bond, a hetero atom group selected from O, S, SO, SO2 and NH, or lower alkylene or lower alkenylene in which the hetero atom group may intervene; R2 is optionally substituted aryl; R3 is hydrogen, a halogen, hydroxy, optionally substituted lower alkyl etc; and R4 and Z2 part taken together forms a ring, to form a polycyclic compound, including e.g., a tricyclic or tetracyclic compound.
    Type: Application
    Filed: March 14, 2014
    Publication date: July 17, 2014
    Applicants: ViiV Healthcare Company, Shionogi & Co., Ltd.
    Inventors: Brian A. JOHNS, Takashi KAWASUJI, Teruhiko TAISHI, Yoshiyuki TAODA
  • Patent number: 8778943
    Abstract: The present invention is directed to a class of substituted 10-hydroxy-9,11-dioxo-2,3,4a,5,9,11,13,13a-octahydro-1H-pyrido[1,2-a]pyrrolo[1?,2?:3,4]imidazo[1,2-d]pyrazine-8-carboxamides useful as anti-HIV agents. The compounds have the formula (I-1-1): wherein ring A is an optionally substituted hexahydro-1H-pyrrolo[1,2-c]-imidazole; R14 and RX are independently hydrogen or optionally substituted lower alkyl; R3 is selected from various groups; R1 is hydrogen or lower alkyl; R is halogen; m is 0, 1, 2 or 3; or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: July 15, 2014
    Assignees: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Brian A. Johns, Takashi Kawasuji, Teruhiko Taishi, Yoshiyuki Taoda
  • Patent number: 8754214
    Abstract: A synthesis approach providing an early ring attachment via a bromination to compound I-I yielding compound II-II: whereby a final product such as AA: can be synthesized. In particular, the 2,4-difluorophenyl-containing sidechain is attached before creation of the additional ring Q.
    Type: Grant
    Filed: December 4, 2013
    Date of Patent: June 17, 2014
    Assignees: Shionogi & Co., Ltd., ViiV Healthcare Company
    Inventors: Hiroshi Yoshida, Yoshiyuki Taoda, Brian Alvin Johns, Takashi Kawasuji, Daiki Nagamatsu