Patents by Inventor Yuji Iizawa
Yuji Iizawa 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: 20200297700Abstract: 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: ApplicationFiled: January 23, 2020Publication date: September 24, 2020Inventors: Mitsuru SHIRAISHI, Masanori BABA, Katsuji AIKAWA, Naoyuki KANZAKI, Masaki SETO, Yuji IIZAWA
-
Publication number: 20190038604Abstract: 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: ApplicationFiled: August 8, 2018Publication date: February 7, 2019Applicant: TOBIRA THERAPEUTICS, INC.Inventors: Mitsuru SHIRAISHI, Masanori BABA, Katsuji AIKAWA, Naoyuki KANZAKI, Masaki SETO, Yuji IIZAWA
-
Patent number: 10045968Abstract: 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: GrantFiled: April 25, 2014Date of Patent: August 14, 2018Assignee: TOBIRA THERAPEUTICS, INC.Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
-
Publication number: 20160008326Abstract: 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: ApplicationFiled: April 25, 2014Publication date: January 14, 2016Inventors: Mitsuru SHIRAISHI, MASANORI BABA, KATSUJI AIKAWA, NAOYUKI KANZAKI, MASAKI SETO, YUJI IIZAWA
-
Patent number: 8741943Abstract: 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: GrantFiled: May 21, 2012Date of Patent: June 3, 2014Assignee: Tobira Therapeutics, Inc.Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
-
Patent number: 8362058Abstract: 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: GrantFiled: May 12, 2008Date of Patent: January 29, 2013Assignee: Tobira Therapeutics, Inc.Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
-
Publication number: 20120232028Abstract: 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: ApplicationFiled: May 21, 2012Publication date: September 13, 2012Applicant: Tobira Therapeutics, Inc.Inventors: Mitsuru SHIRAISHI, Masanori BABA, Katsuji AIKAWA, Naoyuki KANZAKI, Masaki SETO, Yuji IIZAWA
-
Patent number: 8183273Abstract: 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: GrantFiled: October 25, 2007Date of Patent: May 22, 2012Assignee: Tobira Therapeutics, Inc.Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
-
Publication number: 20120077856Abstract: An agent for suppressing the production of various cytokines (IL-8 and the like) and inflammatory mediators, an agent for suppressing the expression of COX-II and the like, or an inhibitor of various phosphorylation enzymes (ATF2 and the like), which contains a TLR signaling inhibitory substance, preferably a compound represented by the formula (I) or the formula (II) wherein each symbol is as defined in the specification, or a salt thereof or a prodrug thereof.Type: ApplicationFiled: December 2, 2011Publication date: March 29, 2012Inventors: Yuji IIZAWA, Masayuki Ii, Tomohiro Kawamoto
-
Publication number: 20110184034Abstract: The present invention provides an agent for the prophylaxis or treatment of severe sepsis, which contains a compound represented by the formula (I): or, the formula (II): or a salt thereof or a prodrug thereof, a TLR signal inhibitor containing a non-peptide compound and an agent for the prophylaxis or treatment of organ dysfunction and the like, which contains a TLR signal inhibitory substance.Type: ApplicationFiled: March 30, 2011Publication date: July 28, 2011Inventors: Masayuki Ii, Yuji Iizawa, Tomoyuki Kitazaki, Kazuki Kubo
-
Publication number: 20100216871Abstract: It is intended to provide preventives/remedies for graft-versus-host disease and/or rejection in organ or bone marrow transplantation, rheumatoid arthritis, autoimmune diseases, allergic diseases, ischemic cerebral cell injury, myocardial infarction, chronic nephritis and arteriosclerosis. The above object can be achieved by preventives/remedies for graft-versus-host disease and/or rejection in organ or bone marrow transplantation, rheumatoid arthritis, autoimmune diseases, allergic diseases, ischemic cerebral cell injury, myocardial infarction, chronic nephritis and arteriosclerosis characterized by containing a specific compound having a CCR (CC chemokine receptor) antagonism.Type: ApplicationFiled: April 9, 2010Publication date: August 26, 2010Inventors: Noboru TSUCHIMORI, Yuji Iizawa, Mitsuru Shiraishi, Yoshihiro Sugihara
-
Publication number: 20090062355Abstract: An agent for suppressing the production of various cytokines (IL-8 and the like) and inflammatory mediators, an agent for suppressing the expression of COX-II and the like, or an inhibitor of various phosphorylation enzymes (ATF2 and the like), which contains a TLR signaling inhibitory substance, preferably a compound represented by the formula (I) or the formula (II) wherein each symbol is as defined in the specification, or a salt thereof or a prodrug thereof.Type: ApplicationFiled: April 19, 2007Publication date: March 5, 2009Inventors: Yuji Iizawa, Masayuki Ii, Tomohiro Kawamoto
-
Publication number: 20090030032Abstract: 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: ApplicationFiled: May 12, 2008Publication date: January 29, 2009Inventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
-
Patent number: 7419973Abstract: A cephem compound (particularly its crystal) represented by the formula [I], wherein X is CH3COOH, CH3CH2COOH or CH3CN, and n is 0 to 5, is useful as an antibacterial agent (particularly anti-MRSA agent) and shows superior quality such as high solid stability, possible long-term stable preservation and the like.Type: GrantFiled: February 23, 2005Date of Patent: September 2, 2008Assignee: Takeda Pharmaceutical Company LimitedInventors: Tomoyasu Ishikawa, Shohei Hashiguchi, Yuji Iizawa
-
Patent number: 7371772Abstract: 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: GrantFiled: August 7, 2002Date of Patent: May 13, 2008Assignee: Takeda Pharmaceutical Company LimitedInventors: Mitsuru Shiraishi, Masanori Baba, Katsuji Aikawa, Naoyuki Kanzaki, Masaki Seto, Yuji Iizawa
-
Patent number: 7262185Abstract: The present invention provides a novel benzazepine derivative represented by formula: wherein, R1 is a 5- or 6-membered aromatic ring, R2 is lower alkyl group, etc., Y is an optionally substituted imino group, ring A and ring B are independently an optionally substituted aromatic ring, W is formula —W1—X2—W2— (W1 and W2 are independently S(O)m1 (m1 is 0, 1, or 2), etc., and X2 is an optionally substituted alkylene group etc.), a preparation method and use thereof.Type: GrantFiled: August 7, 2002Date of Patent: August 28, 2007Assignee: Takeda Chemical Industries Ltd.Inventors: Mitsuru Shiraishi, Masanori Baba, Masaki Seto, Yoshio Aramaki, Naoyuki Kanzaki, Naoki Miyamoto, Yuji Iizawa
-
Publication number: 20060234297Abstract: The present invention provides a screening means for a novel therapeutic drug for arteriosclerosis capable of suppressing the progression of arteriosclerosis due to infection with Chlamydia pneumoniae. Specifically, provided is a screening method for a therapeutic substance for arteriosclerosis and/or a prophylactic/therapeutic substance for complications thereof, which comprises using cells of an established monocytic cell line and a Chlamydia pneumoniae-derived 60-kDa heat shock protein or a partial peptide thereof or a salt thereof or calls capable of producing the same (the cells may be identical to, or different from, the cells of the established monocytic cell line).Type: ApplicationFiled: September 8, 2004Publication date: October 19, 2006Inventors: Ryogo Hayashi, Yuji Iizawa
-
Publication number: 20060058288Abstract: The present invention provides an agent for the prophylaxis or treatment of severe sepsis, which contains a compound represented by the formula (I): or, the formula (II): , or a salt thereof or a prodrug thereof, a TLR signal inhibitor containing a non-peptide compound and an agent for the prophylaxis or treatment of organ dysfunction and the like, which contains a TLR signal inhibitory substance.Type: ApplicationFiled: April 7, 2003Publication date: March 16, 2006Inventors: Masayuki II, Yuji Iizawa, Tomoyuki Kitazaki, Kazuki Kubo
-
Publication number: 20050245537Abstract: It is intended to provide preventives/remedies for graft-versus-host disease and/or rejection in organ or bone marrow transplantation, rheumatoid arthritis, autoimmune diseases, allergic diseases, ischemic cerebral cell injury, myocardial infarction, chronic nephritis and arteriosclerosis. The above object can be achieved by preventives/remedies for graft-versus-host disease and/or rejection in organ or bone marrow transplantation, rheumatoid arthritis, autoimmune diseases, allergic diseases, ischemic cerebral cell injury, myocardial infarction, chronic nephritis and arteriosclerosis characterized by containing a specific compound having a CCR (CC chemokine receptor) antagonism.Type: ApplicationFiled: April 23, 2003Publication date: November 3, 2005Inventors: Noboru Tsuchimori, Yuji Iizawa, Mitsuru Shiraishi, Yoshihiro Sugihara
-
Publication number: 20050176697Abstract: A cephem compound (particularly its crystal) represented by the formula [I], wherein X is CH3COOH, CH3CH2COOH or CH3CN, and n is 0 to 5, is useful as an antibacterial agent (particularly anti-MRSA agent) and shows superior quality such as high solid stability, possible long-term stable preservation and the like.Type: ApplicationFiled: February 23, 2005Publication date: August 11, 2005Inventors: Tomoyasu Ishikawa, Shohei Hashiguchi, Yuji Iizawa