Patents by Inventor Norikazu Tamura

Norikazu Tamura 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: 20090209585
    Abstract: The present invention relates to a cycloalkene derivative represented by the formula (I): wherein each symbol is as defined in the specification, a pharmaceutical agent containing the derivative, and a production method thereof. The cycloalkene derivative of the present invention has high solubility in water and is suitable for use as an injection.
    Type: Application
    Filed: July 6, 2007
    Publication date: August 20, 2009
    Inventors: Takashi Ichikawa, Tomoyuki Kitazaki, Norikazu Tamura
  • Publication number: 20090048258
    Abstract: The present invention relate to a compound represented by the formula (I) or (II) wherein ring A is an optionally substituted ring (the ring should not be pyrrolidine, piperidine and piperazine), ring B is an optionally substituted aromatic ring, ring D is an optionally substituted ring, R1 and R2 are each independently a hydrogen atom or a substituent, R3 is a hydrogen atom or a C1-6 alkyl group, or R3 is bonded to ring A to form a non-aromatic ring, ring Aa is an optionally substituted aromatic hydrocarbon, Y is CH or N, Ra1 is an optionally substituted hydrocarbon group, and Ra2 and Ra3 are each independently a hydrogen atom or a substituent, or a salt thereof. The present invention provides a compound having a DGAT inhibitory activity, which is useful for the treatment or amelioration of diseases or pathologies caused by high expression or high activation of DGAT.
    Type: Application
    Filed: January 31, 2006
    Publication date: February 19, 2009
    Inventors: Masaki Ogino, Yoshihisa Nakada, Mitsuyuki Shimada, Kouhei Asano, Norikazu Tamura, Minori Masago
  • Patent number: 7417059
    Abstract: The present invention is directed to a class of cyclohexene derivatives bearing sulfamoyl and ester groups which have an inhibitory activity on nitric oxide (NO) production and cytokine production, and are useful as an agent for the prophylaxis and/or treatment of diseases such as, cardiac disease, autoimmune disease, inflammatory disease, central nervous system disease, infectious disease, sepsis, and septic shock.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: August 26, 2008
    Assignee: Takeda Pharmacetical Company Limited
    Inventors: Norikazu Tamura, Takashi Ichikawa, Masayuki Ii
  • Patent number: 7078540
    Abstract: A compound of the formula: wherein R1 is an aliphatic hydrocarbon group optionally having substituent(s), an aromatic hydrocarbon group optionally having substituent(s), a heterocyclic group optionally having substituent(s), a group of the formula: OR1a wherein R1a is a hydrogen atom or an aliphatic hydrocarbon group optionally having substituent(s), or a group of the formula: wherein R1b and R1c are the same or different and each is a hydrogen atom or an aliphatic hydrocarbon group optionally having substituent(s), X is a methylene group, a nitrogen atom, a sulfur atom or an oxygen atom, Y is an optionally substituted methylene group or an optionally substituted nitrogen atom, ring A is a 5 to 8-membered ring optionally substituted further by 1 to 4 substituent(s) selected from (1) an aliphatic hydrocarbon group optionally having substituent(s), (2) an aromatic hydrocarbon group optionally having substituent(s), (3) a group of the formula: OR2 wherein R2 is a hydrogen atom, or an aliphatic hydrocarb
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: July 18, 2006
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Norikazu Tamura, Takashi Ichikawa, Masayuki Ii
  • Publication number: 20050176783
    Abstract: A compound of the formula: wherein R1 is an aliphatic hydrocarbon group optionally having substituent(s), an aromatic hydrocarbon group optionally having substituent(s), a heterocyclic group optionally having substituent(s), a group of the formula: OR1a wherein R1a is a hydrogen atom or an aliphatic hydrocarbon group optionally having substituent(s), or a group of the formula: wherein R1b and R1c are the same or different and each is a hydrogen atom or an aliphatic hydrocarbon group optionally having substituent(s), X is a methylene group, a nitrogen atom, a sulfur atom or an oxygen atom, Y is an optionally substituted methylene group or an optionally substituted nitrogen atom, ring A is a 5 to 8-membered ring optionally substituted further by 1 to 4 substituent(s) selected from (1) an aliphatic hydrocarbon group optionally having substituent(s), (2) an aromatic hydrocarbon group optionally having substituent(s), (3) a group of the formula: OR2 wherein R2 is a hydrogen atom, or an aliphatic hydrocarb
    Type: Application
    Filed: March 31, 2005
    Publication date: August 11, 2005
    Inventors: Norikazu Tamura, Takashi Ichikawa, Masayuki Il
  • Patent number: 6432996
    Abstract: To provide a pharmaceutical composition which performs a remarkable effect with a relatively decreased dosage, and, with less side effects, a pharmaceutical composition formulated by combination of an angiotensin II-mediated compound or a salt thereof with at least one species of a compound having the activity of increasing insulin-sensitivity, a compound having the activity of improving postprandial hyperglycemia in diabetes mellitus, an indane derivative having the activity of inhibiting angiotensin converting enzyme, a pyridine derivative having the activity of inhibiting HMG-Co A reductase or salts thereof are advantageously employed.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: August 13, 2002
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Norikazu Tamura, Takashi Sohda, Hitoshi Ikeda
  • Patent number: 6242600
    Abstract: The present invention provides compounds and medicines effective for prophylaxis and therapy of various diseases by controlling or inhibiting cell-adhesion. Especially, the compounds of this invention inhibit platelet aggregation action without remarkable elongation of hemorrhagic period and can be used as a safe and long-acting antithrombotic drug as compared with known substances showing the same activity. Compounds of this invention are piperazinones of the formula: wherein the ring A is a basic heterocyclic group; the ring B is a nitrogen containing heterocyclic group or a cyclic hydrocarbon group; Y is CH2; R1 is H, OH, NH2 or an hydrocarbon group which may be bound through CO, S, SO or SO2; R2 is H or a hydrocarbon group; R3 is an optionally esterified or amidated carboxyl group; and D is a lower alkyl group substituted with an optionally esterified carboxyl group; or a salt thereof.
    Type: Grant
    Filed: July 28, 1999
    Date of Patent: June 5, 2001
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Norikazu Tamura, Zen-ichi Terashita
  • Patent number: 6107323
    Abstract: To provide a pharmaceutical composition which performs a remarkable effect with a relatively decreased dosage, and, with less side effects, a pharmaceutical composition formulated by combination of an angiotensin II-mediated compound or a salt thereof with at least one species of a compound having the activity of increasing insulin-sensitivity, a compound having the activity of improving postprandial hyperglycemia in diabetes mellitus, an indane derivative having the activity of inhibiting angiotensin converting enzyme, a pyridine derivative having the activity of inhibiting HMG-Co A reductase or salts thereof are advantageously employed.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: August 22, 2000
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Norikazu Tamura, Takashi Sohda, Hitoshi Ikeda
  • Patent number: 5495024
    Abstract: An optically active azole compound of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are independently a hydrogen atom, a halogen atom, a haloalkyl group, a haloalkoxy group or an optionally substituted nitrogen-containing heterocyclic group; R.sup.3 is a hydrogen atom or an acyl group; Q is CH or N; ##STR2## is a nitrogen-containing aromatic five-membered heterocyclic group having at least two adjacent nitrogen atoms as the ring-constituting atoms which may be substituted, or an aromatic condensed heterocyclic group having two or more nitrogen atoms as the ring-constituting atoms which may be substituted; and (R) shows that the carbon atom marked with (R) has R-configuration; provided that either of R.sup.1 and R.sup.2 is an optionally substituted nitrogen-containing heterocyclic group when ##STR3## is an 1H-1,2,4-triazol-1-yl group, or a salt thereof, which is useful as an antifungal agent.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: February 27, 1996
    Assignee: Takeda Chemical Industries Ltd.
    Inventors: Katsumi Itoh, Kenji Okonogi, Norikazu Tamura
  • Patent number: 5466820
    Abstract: An azole compound represented by the formula (I): ##STR1## wherein Ar is a substituted phenyl group; R.sup.1 and R.sup.2 independently are a hydrogen atom or a lower alkyl group, or R.sup.1 and R.sup.2 may combine together to form a lower alkylene group; R.sup.3 is a group bonded through a carbon atom; R.sup.4 is a hydrogen atom or an acyl group; X is a nitrogen atom or a methine group; and Y and Z independently are a nitrogen atom or a methine group which may optionally be substituted with a lower alkyl group, or a salt thereof, which is useful for prevention and therapy of fungal infections of mammals as antifungal agent.
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: November 14, 1995
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Katsumi Itoh, Kenji Okonogi, Norikazu Tamura
  • Patent number: 5371101
    Abstract: An azole compound represented by the formula (I): ##STR1## wherein Ar is a substituted phenyl group;R.sup.1 and R.sup.2 independently are a hydrogen atom or a lower alkyl group, or R.sup.1 and R.sup.2 may combine together to form a lower alkylene group;R.sup.3 is a group bonded through a carbon atom;R.sup.4 is a hydrogen atom or an acyl group;X is a nitrogen atom or a methine group; and nY and Z independently are a nitrogen atom or a methine group which may optionally be substituted with a lower alkyl group, or a salt thereof, which is useful for prevention and therapy of fungal infections of mammals as antifungal agent.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: December 6, 1994
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Katsumi Itoh, Kenji Okonogi, Norikazu Tamura
  • Patent number: 5371100
    Abstract: An optically active azole compound of the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are independently a hydrogen atom, a halogen atom, a haloalkyl group, a haloalkoxy group or an optionally substituted nitrogen-containing heterocyclic group; R.sup.3 is a hydrogen atom or an acyl group; Q is CH or N; --NA is a nitrogen-containing aromatic five-membered heterocyclic group having at least two adjacent nitrogen atoms as the ring-constituting atoms which may be substituted, or an aromatic condensed heterocyclic group having two or more nitrogen atoms as the ring-constituting atoms which may be substituted; and (R) shows that the carbon atom marked with (R) has R-configuration; provided that either of R.sup.1 and R.sup.2 is an optionally substituted nitrogen-containing heterocyclic group when --NA is an 1H-1,2,4-triazol-1-yl group, or a salt thereof, which is useful as an antifungal agent.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: December 6, 1994
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Katsumi Itoh, Kenji Okonogi, Norikazu Tamura
  • Patent number: 4698339
    Abstract: A compound of the general formula: ##STR1## wherein X is a lower alkylene group which may optionally be substituted by a hydroxyl group, or a lower alkenylene group, Y is (1) a lower alkyl group, (2) a cycloalkyl group containing 3 to 8 carbon atoms, (3) a lower alkenyl group, (4) an aryl group, (5) an aralkyl group or (6) a 3- to 8-membered heterocyclic group, or the partial structural formula Y--SO.sub.2 --X--, with X and Y being combined with each other, represents a group of the formula: ##STR2## wherein l is an integer of 0 to 3, and m and n each is an integer of 0 to 6, provided that the sum of m and n is in the range of 2 to 6, and R is a hydrocarbon group which may optionally be substituted or a 3- to 8-membered heterocyclic group, or a pharmaceutically acceptable salt thereof a method of production thereof and use thereof. The compound (I) has antimicrobial and .beta.-lactamase inhibitory activities.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: October 6, 1987
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Koichi Yoshioka, Norikazu Tamura, Hideaki Natsugari