Patents by Inventor Yohei Ikuma

Yohei Ikuma 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).

  • N-substituted-cyclic amino derivative
    Patent number: 8658639
    Abstract: The present invention provides a compound of formula (I): wherein R1a is optionally substituted C1-6 alkyl, etc.; R1m is hydrogen atom, etc.; G1, G2, G3 and G4 are (i), etc. ((i) G1 is —N(R1b)—, G2 is —CO—, G3 is —C(R1c)(R1d)—, and G4 is oxygen, etc.); R1b is optionally substituted C1-6 alkyl, etc.; R1c and R1d are each independently optionally substituted C1-6 alkyl, etc.; R2 is optionally substituted C1-6 alkyl, etc.; R3a, R3b, R3c and R3d are each independently a group: -A-B (A is a single bond, etc., B is hydrogen atom, etc.), etc.; n is 1, etc.; R5 is C1-4 alkoxycarbonyl, etc., or a pharmaceutically acceptable salt thereof, which is useful as a renin inhibitor.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: February 25, 2014
    Assignee: Dainippon Sumitomo Pharma Co., Ltd
    Inventors: Satoshi Suetsugu, Nobuhisa Fukuda, Yoshio Nakai, Takashi Takada, Yohei Ikuma, Hiroyuki Nakahira
  • Bicyclic heterocyclic derivative
    Patent number: 8389511
    Abstract: The present invention relates to a compound of the following formula (I) or a pharmaceutically acceptable salt thereof, being useful as a renin inhibitor. [wherein R1a is halogen, etc.; R1m is H, etc.; G1 is —N(R1b)—, etc.; G2 is —CO—, etc.; G3 is —C(R1c)(R1d)—, etc.; G4 is oxygen, etc.; R1b is optionally substituted C1-6 alkyl, etc.; R1c and R1d are independently the same or different, H, etc.; R3 is H, optionally substituted C1-6 alkyl, etc.; R3a, R3b, R3c and R3d are independently the same or different, and a group: -A-B (said A is single bond, etc., and said B is H, etc.), etc.; and n is 1, etc.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: March 5, 2013
    Assignee: Dainippon Sumitomo Pharma Co., Ltd.
    Inventors: Hiroyuki Nakahira, Yohei Ikuma, Nobuhisa Fukuda, Kozo Yoshida, Hidenori Kimura, Satoshi Suetsugu, Akira Fusano, Kiyoto Sawamura, Junya Ikeda, Yoshio Nakai
  • N-SUBSTITUTED-CYCLIC AMINO DERIVATIVE
    Publication number: 20120122773
    Abstract: The present invention provides a compound of formula (I): wherein R1a is optionally substituted C1-6 alkyl, etc.; R1m is hydrogen atom, etc.; G1, G2, G3 and G4 are (i), etc. ((i) G1 is —N(R1b)—, G2 is —CO—, G3 is —C(R1c)(R1d)—, and G4 is oxygen, etc.); R1b is optionally substituted C1-6 alkyl, etc.; R1c and R1d are each independently optionally substituted C1-6 alkyl, etc.; R2 is optionally substituted C1-6 alkyl, etc.; R3a, R3b, R3c and R3d are each independently a group: -A-B (A is a single bond, etc., B is hydrogen atom, etc.), etc.; n is 1, etc.; R5 is C1-4 alkoxycarbonyl, etc., or a pharmaceutically acceptable salt thereof, which is useful as a renin inhibitor.
    Type: Application
    Filed: June 24, 2010
    Publication date: May 17, 2012
    Applicant: DAINIPPON SUMITOMO PHARMA CO., LTD.
    Inventors: Satoshi Suetsugu, Nobuhisa Fukuda, Yoshio Nakai, Takashi Takada, Yohei Ikuma, Hiroyuki Nakahira
  • BICYCLIC HETEROCYCLIC DERIVATIVE
    Publication number: 20110190278
    Abstract: The present invention relates to a compound of the following formula (I) or a pharmaceutically acceptable salt thereof, being useful as a renin inhibitor. [wherein R1a is halogen, etc.; R1m is H, etc.; G1 is —N(R1b)—, etc.; G2 is —CO—, etc.; G3 is —C(R1c)(R1d)—, etc.; G4 is oxygen, etc.; R1b is optionally substituted C1-6 alkyl, etc.; R1c and R1d are independently the same or different, H, etc.; R3 is H, optionally substituted C1-6 alkyl, etc.; R3a, R3b, R3c and R3d are independently the same or different, and a group: -A-B (said A is single bond, etc., and said B is H, etc.), etc.; and n is 1, etc.
    Type: Application
    Filed: December 19, 2008
    Publication date: August 4, 2011
    Inventors: Hiroyuki Nakahira, Yohei Ikuma, Nobuhisa Fukuda, Kozo Yoshida, Hidenori Kimura, Satoshi Suetsugu, Akira Fusano, Kiyoto Sawamura, Junya Ikeda, Yoshio Nakai
  • AMIDE DERIVATIVE
    Publication number: 20100056497
    Abstract: The present invention relates to a compound of the formula (I) being useful as a renin inhibitor, or a pharmaceutically acceptable salt thereof. wherein R1a is a hydrogen atom, an optionally substituted C1-6 alkyl, etc.; R1b is an optionally substituted C1-6 alkoxy, etc.; R1c is a hydrogen atom, an optionally substituted C1-6 alkoxy, etc.; R2 is a hydrogen atom, an optionally substituted C1-6 alkyl, etc.; R3a, R3b, R3c and R3d are independently the same or different, and each is a group of the formula: -A-B (in which A is a single bond, —(CH2)sO—, —(CH2)sN(R4)CO—, etc., B is a hydrogen atom, an optionally substituted C1-6 alkyl, etc.), etc.; R4 is a hydrogen atom, an optionally substituted C1-6 alkyl, etc.; s is 0, etc.; and n is 1, etc.
    Type: Application
    Filed: January 30, 2008
    Publication date: March 4, 2010
    Applicant: DAINIPPON SUMITOMO PHARMA CO., LTD
    Inventors: Hiroyuki Nakahira, Yohei Ikuma, Nobuhisa Fukuda, Tomonori Kobayashi, Shinya Tosaki