Patents by Inventor Masahiro Kajino

Masahiro Kajino 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: 10308605
    Abstract: A proton pump inhibitor containing a compound represented by the formula (I) wherein X and Y are the same or different and each is a bond or a spacer having 1 to 20 carbon atoms in the main chain, R1is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, R2, R3 and R4 are the same or different and each is a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted thienyl group, an optionally substituted benzo[b]thienyl group, an optionally substituted furyl group, an optionally substituted pyridyl group, an optionally substituted pyrazolyl group, an optionally substituted pyrimidinyl group, an acyl group, a halogen atom, a cyano group or a nitro group, R5 and R6 are the same or different and each is a hydrogen atom or an optionally substituted hydrocarbon group, which has a superior proton pump action and shows an antiulcer activity and the like after conversion to a proton pump inhibitor in the body, or a salt thereof, or a prodrug ther
    Type: Grant
    Filed: August 1, 2014
    Date of Patent: June 4, 2019
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Naoki Tarui, Terufumi Takagi
  • Patent number: 8933105
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity, which is represented by the formula (I) wherein R1 is an optionally substituted cyclic group, R2 is a substituent, R3 is an optionally substituted alkyl group, an acyl group, an optionally substituted hydroxy group, an optionally substituted amino group, a halogen atom, a cyano group or a nitro group, R4 and R5 are each a hydrogen atom, an optionally substituted alkyl group, an acyl group, an optionally substituted hydroxy group, an optionally substituted amino group, a halogen atom, a cyano group or a nitro group, R6 and R6? are each a hydrogen atom or an alkyl group, and n is an integer of 0-3, or a salt thereof.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: January 13, 2015
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Haruyuki Nishida, Yasuyoshi Arikawa, Keizo Hirase, Koji Ono
  • Publication number: 20140343070
    Abstract: A proton pump inhibitor containing a compound represented by the formula (I) wherein X and Y are the same or different and each is a bond or a spacer having 1 to 20 carbon atoms in the main chain, R1 is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, R2, R3 and R4 are the same or different and each is a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted thienyl group, an optionally substituted benzo[b]thienyl group, an optionally substituted furyl group, an optionally substituted pyridyl group, an optionally substituted pyrazolyl group, an optionally substituted pyrimidinyl group, an acyl group, a halogen atom, a cyano group or a nitro group, R5 and R6 are the same or different and each is a hydrogen atom or an optionally substituted hydrocarbon group, which has a superior proton pump action and shows an antiulcer activity and the like after conversion to a proton pump inhibitor in the body, or a salt thereof, or a prodrug the
    Type: Application
    Filed: August 1, 2014
    Publication date: November 20, 2014
    Applicant: TAKEDA PHARMACEUTICAL COMPANY LIMITED
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Naoki Tarui, Terufumi Takagi
  • Patent number: 8436187
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl group, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: May 7, 2013
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Patent number: 8415368
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl group, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: April 9, 2013
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Patent number: 8338461
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl group, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: December 25, 2012
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Patent number: 8338462
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl pup, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: December 25, 2012
    Assignee: Takeda Pharmaceuticals Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Patent number: 8299261
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl group, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: October 30, 2012
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Publication number: 20120088797
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl pup, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Application
    Filed: June 8, 2011
    Publication date: April 12, 2012
    Applicant: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro KAJINO, Atsushi HASUOKA, Haruyuki NISHIDA
  • Publication number: 20110301174
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl pup, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Application
    Filed: June 8, 2011
    Publication date: December 8, 2011
    Applicant: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Publication number: 20110301173
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl group, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Application
    Filed: June 8, 2011
    Publication date: December 8, 2011
    Applicant: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Publication number: 20110288040
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory action, an antiulcer activity and the like.
    Type: Application
    Filed: August 5, 2011
    Publication date: November 24, 2011
    Applicant: Takeda Pharmaceutical Company Limited
    Inventors: Atsushi Hasuoka, Terufumi Takagi, Masahiro Kajino, Haruyuki Nishida
  • Patent number: 8048909
    Abstract: A proton pump inhibitor containing a compound represented by the formula (I) wherein X and Y are the same or different and each is a bond or a spacer having 1 to 20 carbon atoms in the main chain, R1 is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, R2, R3 and R4 are the same or different and each is a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted thienyl group, an optionally substituted benzo[b]thienyl group, an optionally substituted furyl group, an optionally substituted pyridyl group, an optionally substituted pyrazolyl group, an optionally substituted pyrimidinyl group, an acyl group, a halogen atom, a cyano group or a nitro group, R5 and R6 are the same or different and each is a hydrogen atom or an optionally substituted hydrocarbon group, which has a superior proton pump action and shows an antiulcer activity and the like after conversion to a proton pump inhibitor in the body, or a salt thereof, or a prodrug the
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: November 1, 2011
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Terufumi Takagi
  • Patent number: 7977488
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl group, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: July 12, 2011
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Patent number: 7973163
    Abstract: The present invention aims at provision of a quinoline derivative having a neurokinin 2 (NK2) receptor antagonistic action and relates to a compound represented by the formula (I) wherein R1 is a hydrogen atom and the like; R2 is a hydrogen atom, a hydrocarbon group optionally having substituent(s) and the like; R3 is unsubstituted (i.e., absence), a hydrogen atom and the like; R4 and R5 are the same or different and each is a hydrogen atom, a hydrocarbon group optionally having substituent(s), and the like; R6 is (cyclic group optionally having substituent(s))-carbonyl, and the like; R7, R8, R9 and R10 are the same or different and each is a hydrogen atom, halogen and the like; or R7 and R8, R8 and R9, and R9 and R10 may form a ring together with the adjacent carbon atoms; n is an integer of 1 to 5; --- represents unsubstituted (i.e., absence) or a single bond; and represents a single bond or a double bond, or a salt thereof, and the like.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: July 5, 2011
    Assignee: Takeda Pharmaceutical Company Ltd.
    Inventors: Masahiro Kajino, Yasuhiko Kawano
  • Publication number: 20110144161
    Abstract: The present invention provides a compound having a superior acid secretion inhibitory effect and showing an antiulcer activity and the like. The present invention provides a compound represented by the formula (I) wherein R1 is a nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle, the nitrogen-containing monocyclic heterocyclic group optionally condensed with a benzene ring or a heterocycle optionally has substituent(s), R2 is an optionally substituted C6-14 aryl group, an optionally substituted thienyl group or an optionally substituted pyridyl group, R3 and R4 are each a hydrogen atom, or one of R3 and R4 is a hydrogen atom and the other is an optionally substituted lower alkyl group, an acyl group, a halogen atom, a cyano group or a nitro group, and R5 is an alkyl group or a salt thereof.
    Type: Application
    Filed: March 1, 2011
    Publication date: June 16, 2011
    Applicant: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Haruyuki Nishida
  • Patent number: 7943770
    Abstract: The present invention aims at provision of a quinoline derivative having a neurokinin 2 (NK2) receptor antagonistic action and relates to a compound represented by the formula (I) wherein R1 is a hydrogen atom and the like; R2 is a hydrogen atom, a hydrocarbon group optionally having substituent(s) and the like; R3 is unsubstituted (i.e., absence), a hydrogen atom and the like; R4 and R5 are the same or different and each is a hydrogen atom, a hydrocarbon group optionally having substituent(s), and the like; R6 is (cyclic group optionally having substituent(s))-carbonyl, and the like; R7, R8, R9 and R10 are the same or different and each is a hydrogen atom, halogen and the like; or R7 and R8, R8 and R9, and R9 and R10 may form a ring together with the adjacent carbon atoms; n is an integer of 1 to 5; ?represents unsubstituted (i.e., absence) or a single bond; and ?represents a single bond or a double bond, or a salt thereof, and the like.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: May 17, 2011
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Yasuhiko Kawano
  • Publication number: 20110028476
    Abstract: A proton pump inhibitor containing a compound represented by the formula (I) wherein X and Y are the same or different and each is a bond or a spacer having 1 to 20 carbon atoms in the main chain, R1 is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, R2, R3 and R4 are the same or different and each is a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted thienyl group, an optionally substituted benzo[b]thienyl group, an optionally substituted furyl group, an optionally substituted pyridyl group, an optionally substituted pyrazolyl group, an optionally substituted pyrimidinyl group, an acyl group, a halogen atom, a cyano group or a nitro group, R5 and R6 are the same or different and each is a hydrogen atom or an optionally substituted hydrocarbon group, which has a superior proton pump action and shows an antiulcer activity and the like after conversion to a proton pump inhibitor in the body, or a salt thereof.
    Type: Application
    Filed: September 1, 2010
    Publication date: February 3, 2011
    Inventors: Masahiro Kajino, Atsushi Hasuoka, Naoki Tarui, Terufumi Takagi
  • Patent number: 7767665
    Abstract: This invention provides a compound represented by the formula (I): wherein R1 is a hydrogen atom, a halogen atom, hydroxy, nitro, optionally halogenated alkyl, alkoxy optionally having substituents, acyl or amino optionally having substituents; R2 is pyridyl, furyl, thienyl, pyrrolyl, quinolyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl, tetrahydroquinolyl or thiazolyl, each of which may have substituents; n is 1 or 2; or a salt. And this invention provides a safe pharmaceutical comprising the compound of the formula (I), which has an excellent apoptosis inhibitory effect and MIF binding effect, for preventing and/or treating heart disease, nervous degenerative disease, cerebrovascular disease, central nervous infectious disease, traumatorathy, demyelinating disease, bone and articular disease, kidney disease, liver disease, osteomyelodysplasia, AIDS, cancer, and the like.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: August 3, 2010
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Yutaka Nakayama, Akira Kawada, Haruhide Kimura, Taisuke Tawaraishi
  • Patent number: 7659267
    Abstract: As prophylactic and/or therapeutic agents for cardiovascular diseases, bone or joint diseases, infectious diseases, inflammatory diseases, kidney diseases, etc. having safe and excellent effects of cell death inhibition, MIF binding, etc., there are provided compounds represented by formula: [wherein, R1 represents a halogen atom, etc., R2 represents a group represented by formula: (wherein, R3 represents hydrogen atom, an optionally substituted alkoxy, etc., R4 represents hydrogen atom, bromine atom, cyano, etc., R5 represents hydrogen atom, hydroxy, etc., R6 represents hydrogen atom, etc., R7 represents hydrogen atom, etc.) etc., and n represents an integer of 0 to 4] or salts thereof.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: February 9, 2010
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Masahiro Kajino, Yutaka Nakayama, Haruhide Kimura