Patents by Inventor Kiyoto Sawamura

Kiyoto Sawamura 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: 20230029044
    Abstract: The present invention provides a method for chiral resolution of Trolox. The present disclosure relates to a method for producing a solid salt of a compound of formula I, wherein an amide-based solvent is added to a sample, which contains a compound of formula I, while being assumed to contain a compound of formula II, in the presence of an optical resolution agent: Formula I: (R)-6-hydroxy-2, 5, 7, 8-tetramethylchroman-2-carboxylic acid (hereinafter referred to R Trolox) Formula II: (S)-6-hydroxy-2, 5, 7, 8-tetramethylchroman-2-carboxylic acid (hereinafter referred to S Trolox).
    Type: Application
    Filed: February 19, 2021
    Publication date: January 26, 2023
    Inventors: Kiichi KURODA, Kiyoto SAWAMURA, Shinjiro TSUYUMINE
  • Publication number: 20160318933
    Abstract: The present invention provides a cyclic aminomethyl pyrimidine derivative including a pharmaceutically acceptable salt thereof with high selectivity for dopamine D4 receptor, which is useful for treating a disease such as attention deficit hyperactivity disorder. Specifically, the present invention relates no a compound of formula (1) or a pharmaceutically acceptable salt thereof, wherein n and m are independently 1 or 2; W1, W3, and W4 are independently single bond or optionally-substituted C1-4 alkylene group; W2 is optionally-substituted C1-4 alkylene group; R1 and R2 are independently hydrogen atom, etc.; R3 is hydrogen atom, halogen atom, etc.; X1 and X2 are independently single bond, oxygen atom, etc.; ring Q1 is optionally-substituted 5- to 10-membered heteroaryl group, etc.; ring Q2 is optionally-substituted 6-membered heteroaryl group, etc.
    Type: Application
    Filed: October 22, 2014
    Publication date: November 3, 2016
    Applicant: Sumitomo Dainippon Pharma Co., Ltd.
    Inventors: Hidefumi YOSHINAGA, Yoshiharu URUNO, Kiyoto SAWAMURA, Nana GOTO, Yohei IKUMA
  • Patent number: 8933229
    Abstract: Disclosed is a compound represented by formula (1) or a pharmacologically acceptable salt thereof (In the formula, A represents a group that is represented by formula (A-1); R1a and R1b may be the same or different and each independently represents a C1-6 alkyl group which may be substituted by one to three halogen atoms; m and n each independently represents an integer of 0-5; X1 represents a hydroxyl group or an aminocarbonyl group; Z1 represents a single bond or the like; and R2 represents an optionally substituted C1-6 alkyl group, an optionally substituted C6-10 aryl group or the like).
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: January 13, 2015
    Assignee: Sumitomo Dainippon Pharma Co., Ltd.
    Inventors: Yoshihiro Horiuchi, Kiyoto Sawamura, Hiroaki Fujiwara
  • Patent number: 8895552
    Abstract: Provided is a compound represented by formula (1) or a pharmacologically acceptable salt thereof. (In the formula, A is C6-10 arylene, etc.; R1a, R1b and R1c each independently is a hydrogen atom, a halogen atom, a C1-4 alkyl group, a C1-4 alkoxy group, etc.; R2 is an optionally substituted C6-10 aryl group, an optionally substituted 5- to 12-membered monocyclic or polycyclic heteroaryl group, an optionally substituted C7-16 aralkyl group, etc.; m is 0, etc.; n is an integer of 0 to 2.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: November 25, 2014
    Assignee: Sumitomo Dainippon Pharma Co., Ltd.
    Inventors: Yoshihiro Horiuchi, Hiroaki Fujiwara, Hitoshi Suda, Izumi Sasaki, Mitsutaka Iwata, Kiyoto Sawamura
  • Publication number: 20130217692
    Abstract: Provided is a compound represented by formula (1) or a pharmacologically acceptable salt thereof. (In the formula, A is C6-10 arylene, etc.; R1a, R1b and R1c each independently is a hydrogen atom, a halogen atom, a C1-4 alkyl group, a C1-4 alkoxy group, etc.; R2 is an optionally substituted C6-10 aryl group, an optionally substituted 5- to 12-membered monocyclic or polycyclic heteroaryl group, an optionally substituted C7-16 aralkyl group, etc.; m is 0, etc.; n is an integer of 0 to 2.
    Type: Application
    Filed: September 2, 2011
    Publication date: August 22, 2013
    Applicant: DAINIPPON SUMITOMO PHARMA CO., LTD.
    Inventors: Yoshihiro Horiuchi, Hiroaki Fujiwara, Hitoshi Suda, Izumi Sasaki, Mitsutaka Iwata, Kiyoto Sawamura
  • 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
  • Publication number: 20120225876
    Abstract: Disclosed is a compound represented by formula (1) or a pharmacologically acceptable salt thereof (In the formula, A represents a group that is represented by formula (A-1); R1a and R1b may be the same or different and each independently represents a C1-6 alkyl group which may be substituted by one to three halogen atoms; m and n each independently represents an integer of 0-5; X1 represents a hydroxyl group or an aminocarbonyl group; Z1 represents a single bond or the like; and R2 represents an optionally substituted C1-6 alkyl group, an optionally substituted C6-10 aryl group or the like.
    Type: Application
    Filed: November 11, 2010
    Publication date: September 6, 2012
    Applicant: DAINIPPON SUMITOMO PHARMA CO., LTD.
    Inventors: Yoshihiro Horiuchi, Kiyoto Sawamura, Hiroaki Fujiwara
  • 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