Patents by Inventor Katsuji Aikawa

Katsuji Aikawa 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: 20200297700
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Application
    Filed: January 23, 2020
    Publication date: September 24, 2020
    Inventors: Mitsuru SHIRAISHI, Masanori BABA, Katsuji AIKAWA, Naoyuki KANZAKI, Masaki SETO, Yuji IIZAWA
  • Publication number: 20190038604
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Application
    Filed: August 8, 2018
    Publication date: February 7, 2019
    Applicant: TOBIRA THERAPEUTICS, INC.
    Inventors: Mitsuru SHIRAISHI, Masanori BABA, Katsuji AIKAWA, Naoyuki KANZAKI, Masaki SETO, Yuji IIZAWA
  • Patent number: 10045968
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atom; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: August 14, 2018
    Assignee: TOBIRA THERAPEUTICS, INC.
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
  • Publication number: 20160008326
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atom; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Application
    Filed: April 25, 2014
    Publication date: January 14, 2016
    Inventors: Mitsuru SHIRAISHI, MASANORI BABA, KATSUJI AIKAWA, NAOYUKI KANZAKI, MASAKI SETO, YUJI IIZAWA
  • Patent number: 8741943
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: June 3, 2014
    Assignee: Tobira Therapeutics, Inc.
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
  • Patent number: 8362058
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: January 29, 2013
    Assignee: Tobira Therapeutics, Inc.
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
  • Publication number: 20120232028
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Application
    Filed: May 21, 2012
    Publication date: September 13, 2012
    Applicant: Tobira Therapeutics, Inc.
    Inventors: Mitsuru SHIRAISHI, Masanori BABA, Katsuji AIKAWA, Naoyuki KANZAKI, Masaki SETO, Yuji IIZAWA
  • Patent number: 8183273
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: May 22, 2012
    Assignee: Tobira Therapeutics, Inc.
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
  • Publication number: 20090030032
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Application
    Filed: May 12, 2008
    Publication date: January 29, 2009
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
  • Publication number: 20080161287
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Application
    Filed: October 25, 2007
    Publication date: July 3, 2008
    Applicant: Takeda Pharmaceutical Company, Ltd
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Lizawa
  • Patent number: 7371772
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof. The compound of the present invention is represented by the formula: wherein, R1 is a 5- to 6-membered ring group which may be substituted; X1 is a bond or the like; ring A is a 5- to 6-membered ring group which may be substituted; ring B is a 8- to 10-membered ring group which may be substituted; X2 is a bivalent group of 1 to 4 atoms; Z1 is a bivalent cyclic ring group or the like; Z2 is a bond or the like; and R2 is an amino group, a nitrogen-containing heterocyclic group which may be substituted or the like, or a salt thereof.
    Type: Grant
    Filed: August 7, 2002
    Date of Patent: May 13, 2008
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
  • Patent number: 7288654
    Abstract: The present invention provides a compound represented by the formula: wherein R1 is a 5- or 6-membered ring which may be substituted; R3 is a hydrogen atom, a lower alkyl group or a lower alkoxy group; Z1 is a 5- or 6-membered aromatic ring; Z2 is a group represented by -Z2a-W2-Z2b wherein Z2a and Z2b are each O, S(O)m (wherein m is 0, 1 or 2), an imino group, or a bond; and W2 is an alkylene chain which may be substituted; n is an integer of 0 to 4; Y is O, S(O)p (wherein p is 0, 1 or 2), CH2 or NR4 (wherein R4 is a hydrogen atom, a hydrocarbon group, a heterocyclic group, or an acyl group); and R2 is (1) an amino group, in which the nitrogen atom is converted to quaternary ammonium or oxide, (2) a nitrogen-containing heterocyclic group which may contain a sulfur atom or an oxygen atom as a ring-constituting atom, in which the nitrogen atom may be converted to a quaternary ammonium or an oxide, and the like, or a salt thereof.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: October 30, 2007
    Assignee: Takeda Pharmaceutical Company Ltd
    Inventors: Mitsuru Shiraishi, Katsuji Aikawa, Naoyuki Kanzaki, Masanori Baba
  • Publication number: 20060178359
    Abstract: A compound of the formula: wherein R1 is a 5- or 6-membered ring; Z1 is a 5- or 6-membered aromatic ring; Z2 is a group -Z2a-W2-Z2b-, wherein Z2a and Z2b are each O, S(O)q (wherein q is 0, 1 or 2), an imino group, or a bond; and W2 is an alkylene chain; W is a group represented by wherein R3 and R3? are each a hydrogen atom, a lower alkyl group, or a lower alkoxy group; X is CH or N; n and n? are each an integer of 0 or 1 to 4; m and m? are each 1 or 2; Y is O, S(O)p (wherein p is 0, 1 or 2), CH2 or NR4 (wherein R4 is a hydrogen atom, a lower alkyl group, or a lower acyl group); and R2 is (1) an amino group, in which the nitrogen atom may be converted to a quaternary ammonium or an oxide, or (2) a nitrogen-containing heterocyclic group which may contain a sulfur atom or an oxygen atom as the ring-constituting atom, in which the nitrogen atom may be converted to a quaternary ammonium or an oxide; or a salt thereof.
    Type: Application
    Filed: February 5, 2004
    Publication date: August 10, 2006
    Inventors: Mitsuru Shiraishi, Masaki Seto, Katsuji Aikawa, Naoyuki Kanzaki, Masanori Baba
  • Publication number: 20060160864
    Abstract: A compound represented by the formula: wherein R1 is a 5- or 6-membered ring; R3 is a hydrogen atom, a lower alkyl group or a lower alkoxy group; R7 and R8 are each a hydrogen atom or a lower alkyl group; Z1 is another 5- or 6-membered aromatic ring; Z2 is a group represented by -Z2a-W1-Z2b- [wherein Z2a and Z2b are each O, S(O)m (wherein m is 0, 1 or 2), an imino group or a bond, and W1 is an alkylene chain]; X is CR (wherein R is a hydrogen atom, a lower alkyl group, a lower alkoxy group, an acyl group, or R and adjacent R4 may form a 5- or 6-membered alicyclic heterocyclic group) or N; R4 is NR5R6 (wherein R5 and R6 are each a hydrogen atom, a hydrocarbon group, a heterocyclic group or an acyl group), or R5 and R6 are bonded to each other to form a heterocyclic group of NR5R6; and R2 is (1) an amino group which may be a quaternary ammonium or oxide, (2) a nitrogen-containing heterocyclic group which may contain a sulfur atom or an oxygen atom as the ring-constituting atom, in which the nitrogen atom m
    Type: Application
    Filed: February 2, 2004
    Publication date: July 20, 2006
    Inventors: Mitsuru Shiraishi, Masaki Seto, Katsuji Aikawa, Naoyuki Kanzaki, Masanori Baba
  • Publication number: 20060100197
    Abstract: The present invention provides a compound represented by the formula: wherein R1 is a 5- or 6-membered ring which may be substituted; R3 is a hydrogen atom, a lower alkyl group or a lower alkoxy group; Z1 is a 5- or 6-membered aromatic ring; Z2 is a group represented by -Z2a-W2-Z2b wherein Z2a and Z2b are each O, S(O)m (wherein m is 0, 1 or 2), an imino group, or a bond; and W2 is an alkylene chain which may be substituted; n is an integer of 0 to 4; Y is O, S(O)p (wherein p is 0, 1 or 2), CH2 or NR4 (wherein R4 is a hydrogen atom, a hydrocarbon group, a heterocyclic group, or an acyl group); and R2 is (1) an amino group, in which the nitrogen atom is converted to quaternary ammonium or oxide, (2) a nitrogen-containing heterocyclic group which may contain a sulfur atom or an oxygen atom as a ring-constituting atom, in which the nitrogen atom may be converted to a quaternary ammonium or an oxide, and the like, or a salt thereof.
    Type: Application
    Filed: February 5, 2004
    Publication date: May 11, 2006
    Applicant: Takeda Pharmaceutical Company Limited
    Inventors: Mitsuru Shiraishi, Katsuji Aikawa, Naoyuki Kanzaki, Masanori Baba
  • Publication number: 20040259876
    Abstract: The present invention provides a new cyclic compound having a CCR antagonist activity, especially a CCR5 antagonist activity, and the use thereof.
    Type: Application
    Filed: January 23, 2004
    Publication date: December 23, 2004
    Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa