Patents by Inventor Takehiko Ohkawa

Takehiko Ohkawa 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: 7776897
    Abstract: There is provided a compound which can be used for therapy of diseases in which 11?-hydroxysteroid dehydrogenase type 1 (11?-HSD1) participates, in particular diabetes, insulin resistance. It has been found that a triazole derivative wherein the triazole ring is substituted with a trisubstituted methyl group in the 2-position or a pharmaceutically acceptable salt thereof has a strong 11?-HSD1 inhibitory activity. Moreover, the triazole derivative of the invention exhibits an excellent blood-glucose level-lowering action and hence can be used for therapy of diabetes, insulin resistance.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: August 17, 2010
    Assignee: Astellas Pharma Inc.
    Inventors: Takeshi Murakami, Tomoaki Kawano, Ryota Shiraki, Hirofumi Ishii, Seiji Yoshimura, Takehiko Ohkawa, Mitsuru Hosaka, Hiroki Fukudome, Yutaka Inoki
  • Publication number: 20070259854
    Abstract: [Problem] There is provided a compound which can be used for therapy of diseases in which 11?-hydroxysteroid dehydrogenase type 1 (11?-HSD1) participates, in particular diabetes, insulin resistance. [Means for Solution] It has been found that a triazole derivative wherein the triazole ring is substituted with a trisubstituted methyl group in the 2-position or a pharmaceutically acceptable salt thereof has a strong 11?-HSD1 inhibitory activity. Moreover, the triazole derivative of the invention exhibits an excellent blood-glucose level-lowering action and hence can be used for therapy of diabetes, insulin resistance.
    Type: Application
    Filed: September 14, 2005
    Publication date: November 8, 2007
    Applicant: ASTELLAS PHARMA INC.
    Inventors: Takeshi Murakami, Tomoaki Kawano, Ryota Shiraki, Hirofumi Ishii, Seiji Yoshimura, Takehiko Ohkawa, Mitsuru Hosaka, Hiroki Fukudome, Yutaka Inoki
  • Patent number: 7186731
    Abstract: A compound of the formula (I) or a pharmaceutically acceptable salt thereof: [wherein X1 and X2 each is independently lower alkylene; X3 is ?CH2, ?CHF or ?CF2; R1 is substituent, R2 and R3 each is independently H or lower alkyl; n is 0, 1, 2, 3 or 4.] having the activity inhibiting DPP-IV activity. They are therefore useful in the treatment of conditions mediated by DPP-IV, such as NIDDM.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: March 6, 2007
    Assignee: Astellas Pharma Inc.
    Inventors: Ichiro Shima, Akio Kuroda, Takehiko Ohkawa, Toshio Kurosaki, Yuki Sawada, Aiko Wada
  • Patent number: 7129243
    Abstract: The present invention relates to a compound of the formula (I) wherein R1 is benzofuranyl substituted by halogen, or styryl substituted by halogen; R2 is substituted hydroxy, substituted mercapto or substituted sulfonyl; and X is or pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: October 31, 2006
    Assignee: Astellas Pharma Inc.
    Inventors: Ichiro Shima, Takehiko Ohkawa, Kentaro Sato, Naoki Ishibashi, Kenichiro Imamura
  • Publication number: 20050137224
    Abstract: A compound of the formula (I) or a pharmaceutically acceptable salt thereof: [wherein X1 and X2 each is independently lower alkylene; X3 is ?CH2, ?CHF or ?CF2; R1 is substituent, R2 and R3 each is independently H or lower alkyl; n is 0, 1, 2, 3 or 4.]having the activity inhibiting DPP-IV activity. They are therefore useful in the treatment of conditions mediated by DPP-IV, such as NIDDM.
    Type: Application
    Filed: October 29, 2004
    Publication date: June 23, 2005
    Applicant: FUJISAWA PHARMACEUTICAL CO., LTD.
    Inventors: Ichiro Shima, Akio Kuroda, Takehiko Ohkawa, Toshio Kurosaki, Yuki Sawada, Aiko Wada
  • Patent number: 6825200
    Abstract: The present invention a compound represented by the formula (I): where the structural variables R1-R6 are defined herein.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: November 30, 2004
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Ichiro Shima, Takehiko Ohkawa, Kazuhiko Ohne, Kentaro Sato, Naoki Ishibashi, Kenichiro Imamura
  • Publication number: 20040157891
    Abstract: A compound of the formula (I): 1
    Type: Application
    Filed: January 16, 2004
    Publication date: August 12, 2004
    Applicant: FUJISAWA PHARMACEUTICAL CO., LTD.
    Inventors: Hirofumi Yamamoto, Junya Ishida, Daisuke Tanabe, Shigeki Satoh, Yuki Sawada, Takehiko Ohkawa, Kenichiro Imamura, Katsuya Nakamura
  • Publication number: 20040097425
    Abstract: The present invention relates to a compound of the formula (I)wherein R1 is benzofuranyl substituted by halogen, or styryl substituted by halogen; R2 is substituted hydroxy, substituted mercapto or substituted sulfonyl; and X is or pharmaceutically acceptable salts thereof. The compound (1) of the present invention and pharmaceutically acceptable salts thereof possess a strong inhibitory activity on the production of nitric oxide (NO), and are useful for prevention and/or treatment of NO-mediated diseases in human being and animals.
    Type: Application
    Filed: December 23, 2003
    Publication date: May 20, 2004
    Inventors: Ichiro Shima, Takehiko Ohkawa, Kentaro Sato, Naoki Ishibashi, Kenichiro Imamura
  • Patent number: 6495542
    Abstract: A compound of formula (I): wherein A is an optionally substituted heterocyclic group, R is a lower alkoxy; Z is C═O or CH2; and B is benzazapinyl, which may be optionally substituted, or a salt thereof, that possesses vasopressin antagonistic activity and is useful as a vasopressin antagonist.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: December 17, 2002
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki Setoi, Takehiko Ohkawa, Yuki Sawada, Kazuhiko Osoda, Teruo Oku
  • Publication number: 20020132809
    Abstract: 1
    Type: Application
    Filed: February 25, 2002
    Publication date: September 19, 2002
    Applicant: Fujisawa Pharmaceutical Co. Ltd.
    Inventors: Teruo Oku, Ichiro Shima, Takehiko Ohkawa, Kazuhiko Ohne, Tatsuya Zenko, Kousei Yoshihara, Hiroyuki Setoi
  • Patent number: 6316482
    Abstract: This invention relates to new benzamide derivatives having a vasopressin antagonistic activity, etc. and represented by general formula (I): wherein R1 is aryl optionally substituted with lower alkoxy, etc., R2 is lower alkyl, etc., R3 is hydrogen, etc., A is NH, etc., E is etc., X is —CH═CH—, —CH═N—, or S, and Y is a condensed heterocyclic group, etc., and pharmaceutically acceptable salts thereof, to processes for preparation thereof and to a pharmaceutical composition comprising the same.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: November 13, 2001
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki Setoi, Takehiko Ohkawa, Tatsuya Zenkoh, Hitoshi Sawada, Yuki Sawada, Teruo Oku
  • Patent number: 6211242
    Abstract: This invention relates to new benzamide derivatives having a vasopressin antagonistic activity, etc. and represented by the general formula (I): wherein R1 is aryl optionally substituted with lower alkyl, etc., R2 is lower alkyl, etc., R3 is hydrogen, etc., R4 is aryl, etc., X is CH or N, and Y is CH or N, and pharmaceutically acceptable salts thereof, to processes for the preparation thereof and to a pharmaceutical composition comprising the same.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: April 3, 2001
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki Setoi, Takehiko Ohkawa, Tatsuya Zenkoh, Keiji Hemmi, Hirokazu Tanaka
  • Patent number: 6207693
    Abstract: This invention relates to new benzamide derivatives having a vasopressin antagonistic activity, etc. and represented by general formula (I): wherein R1 is aryl optionally substituted with lower alkoxy, etc., R2 is lower alkyl, etc., R3 is hydrogen, etc., A is NH, etc., E is etc., X is —CH═CH—, —CH═N—, or S, and Y is a condensed heterocyclic group, etc., and pharmaceutically acceptable salts thereof, to processes for preparation thereof and to a pharmaceutical composition comprising the same.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: March 27, 2001
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki Setoi, Takehiko Ohkawa, Tatsuya Zenkoh, Hitoshi Sawada, Yuki Sawada, Teruo Oku
  • Patent number: 6054457
    Abstract: This invention relates to new benzamide derivatives having a vasopressin antagonistic activity, etc, and represented by general formula (I): ##STR1## wherein R.sup.1 is aryl optionally substituted with lower alkoxy, etc., R.sup.2 is lower alkyl, etc.,R.sup.3 is hydrogen, etc.,R.sup.4 is lower alkoxy, etc.,R.sup.5 is hydrogen, etc.,A is NH, etc.,E is ##STR2## etc., X is --CH.dbd.CH--, --CH.dbd.N--, or S, andY is CH or N,and pharmaceutically acceptable salts thereof, to processes for preparation thereof and to a pharmaceutical composition comprising the same.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: April 25, 2000
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki Setoi, Takehiko Ohkawa, Tatsuya Zenkoh, Hitoshi Sawada, Kentaro Sato, Hirokazu Tanaka
  • Patent number: 5789405
    Abstract: An oxaspiro ?2,5!octane derivative of the formula: ##STR1## useful in inhibiting angiogenesis in solid tumors.
    Type: Grant
    Filed: June 5, 1991
    Date of Patent: August 4, 1998
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Teruo Oku, Chiyoshi Kasahara, Takehiko Ohkawa, Masashi Hashimoto
  • Patent number: 5767293
    Abstract: Oxaspiro?2,5! octanes of the formula ##STR1## inhibit angiogenesis and are particularly suitable for the treatment of solid tumors. In preferred embodiments, R.sup.1 is a carbamoyl derivative, R.sup.2 is an alkoxy substituent and R.sup.3 is ##STR2## Pharmaceutical salts of these compounds, such as methyl, amonium and organic amine salts also exhibit desirable properties.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: June 16, 1998
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Teruo Oku, Chiyoshi Kasahara, Takehiko Ohkawa, Masashi Hashimoto
  • Patent number: 5521170
    Abstract: Compounds having the structure below ##STR1## and pharmaceutically acceptable salts thereof exhibit vasopressin antagonistic activity, vasodilating activity, hypotensive activity, activity for inhibiting saccharide release in the liver, activity for inhibiting growth of mesagium cells, water diuretic activity, platelet agglutination inhibitory activity, oxytocin antagonistic activity and the like, and are useful in treating or preventing hypertension, heart failure, renal insufficiency, edema, ascites, vasopressin parasecretion syndrome, hepatocirrhosis, hyponatremia, hypokalemia, diabetic or circulation disorder, oxytocin related diseases and the like.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: May 28, 1996
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Hiroyuki Setoi, Takehiko Ohkawa, Tatsuya Zenkoh, Keiji Hemmi, Hirokazu Tanaka
  • Patent number: 4954496
    Abstract: The invention relates to a cyclohexane derivative, useful as an angiogenesis inhibitor, of the formula: ##STR1## wherein R.sup.1 is halomethyl; or arylthiomethyl which may have amino, lower alkoxy or acylamino,R.sup.2 is lower alkoxy,R.sup.3 is ##STR2## or ##STR3## and R.sup.4 is hydrogen, lower alkylcarbamoyl, lower alkylcarbamoyloxy(lower)alkylcarbamoyl, heterocyclic carbonyl or heterocyclic carbamoyl, or salt thereof.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: September 4, 1990
    Assignee: Fujisawa Pharmaceutical Company, Ltd.
    Inventors: Teruo Oku, Ciyoshi Kasahara, Takehiko Ohkawa, Masashi Hashimoto