Patents by Inventor Hiroaki Shitama

Hiroaki Shitama 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: 11802135
    Abstract: The present invention aims to provide a compound acting as a specific agonist for LPA4 receptors, and a pharmaceutical composition containing the compound. The present invention relates to a novel lysophosphatidic acid derivative having an agonistic action on LPA4 receptors and useful for the prophylaxis and/or treatment of diseases associated with angiogenesis abnormalities involving LPA4 receptors, diseases associated with vascular disorders, or the symptoms associated therewith, and a pharmaceutical composition containing the derivative.
    Type: Grant
    Filed: November 3, 2021
    Date of Patent: October 31, 2023
    Assignees: MITSUBISHI TANABE PHARMA CORPORATION, OSAKA UNIVERSITY
    Inventors: Maiko Hamada, Yuki Arai, Shuhei Yamakoshi, Hiroko Wada, Kazufumi Otsuki, Hiroaki Shitama, Nobuyuki Takakura
  • Publication number: 20230146210
    Abstract: The present invention aims to provide a compound acting as a specific agonist for LPA4 receptors, and a pharmaceutical composition containing the compound. The present invention relates to a novel lysophosphatidic acid derivative having an agonistic action on LPA4 receptors and useful for the prophylaxis and/or treatment of diseases associated with angiogenesis abnormalities involving LPA4 receptors, diseases associated with vascular disorders, or the symptoms associated therewith, and a pharmaceutical composition containing the derivative.
    Type: Application
    Filed: November 3, 2021
    Publication date: May 11, 2023
    Applicants: MITSUBISHI TANABE PHARMA CORPORATION, OSAKA UNIVERSITY
    Inventors: Maiko HAMADA, Yuki ARAI, Shuhei YAMAKOSHI, Hiroko WADA, Kazufumi OTSUKI, Hiroaki SHITAMA, Nobuyuki TAKAKURA
  • Patent number: 9981960
    Abstract: The present invention relates to a novel pyrrolidine compound having melanocortin receptor agonist activity or a pharmaceutically acceptable salt thereof, and to pharmaceutical applications thereof. The present invention relates to a pyrrolidine derivative represented by formula [I], wherein ring A represents an optionally substituted aryl group or the like; R1 represents an optionally substituted alkyl group or the like; R2 represents a halogen atom or the like; and R3 is an alkyl group substituted with an optionally substituted aryl group or the like, and R4 is a hydrogen atom or the like; or R3 and R4 are terminally attached to each other, and together with the nitrogen atom to which they are attached, form an optionally substituted nitrogen-containing aliphatic heterocyclic ring that may partially contain a double bond; or to a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: May 29, 2018
    Assignee: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Yasuo Yamamoto, Atsushi Sato, Kenji Morokuma, Hiroaki Shitama, Takashi Adachi, Masahiko Miyashiro
  • Patent number: 9975871
    Abstract: This is to provide a continuous arycyclic compound having a DGAT1 inhibitory activity, and useful for prophylaxis and/or treatment of obesity or hyperlipidemia caused by obesity, hypertriglyceridemia, lipid metabolism disorder, fatty liver, hypertension, arteriosclerosis, diabetes, etc., as well as to provide a DGAT1 inhibitor comprising the continuous arycyclic compound or a pharmaceutically acceptable salt thereof as an effective ingredient. Disclosed is the continuous arycyclic compound is represented by the formula: wherein the substituents in the formula are the same as defined in the specification, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: May 22, 2018
    Assignee: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Osamu Sakurai, Kunio Saruta, Norimitsu Hayashi, Takashi Goi, Kenji Morokuma, Hidekazu Tsujishima, Hiroaki Sawamoto, Hiroaki Shitama, Ritsuo Imashiro
  • Publication number: 20170190697
    Abstract: The present invention relates to a novel pyrrolidine compound having melanocortin receptor agonist activity or a pharmaceutically acceptable salt thereof, and to pharmaceutical applications thereof. The present invention relates to a pyrrolidine derivative represented by formula [I], wherein ring A represents an optionally substituted aryl group or the like; R1 represents an optionally substituted alkyl group or the like; R2 represents a halogen atom or the like; and R3 is an alkyl group substituted with an optionally substituted aryl group or the like, and R4 is a hydrogen atom or the like; or R3 and R4 are terminally attached to each other, and together with the nitrogen atom to which they are attached, form an optionally substituted nitrogen-containing aliphatic heterocyclic ring that may partially contain a double bond; or to a pharmaceutically acceptable salt thereof.
    Type: Application
    Filed: May 28, 2015
    Publication date: July 6, 2017
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Yasuo YAMAMOTO, Atsushi SATO, Kenji MOROKUMA, Hiroaki SHITAMA, Takashi ADACHI, Masahiko MIYASHIRO
  • Publication number: 20160272614
    Abstract: This is to provide a continuous arycyclic compound having a DGAT1 inhibitory activity, and useful for prophylaxis and/or treatment of obesity or hyperlipidemia caused by obesity, hypertriglyceridemia, lipid metabolism disorder, fatty liver, hypertension, arteriosclerosis, diabetes, etc., as well as to provide a DGAT1 inhibitor comprising the continuous arycyclic compound or a pharmaceutically acceptable salt thereof as an effective ingredient. Disclosed is the continuous arycyclic compound is represented by the formula: wherein the substituents in the formula are the same as defined in the specification, or a pharmaceutically acceptable salt thereof.
    Type: Application
    Filed: February 22, 2016
    Publication date: September 22, 2016
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Osamu SAKURAI, Kunio SARUTA, Norimitsu HAYASHI, Takashi GOI, Kenji MOROKUMA, Hidekazu TSUJISHIMA, Hiroaki SAWAMOTO, Hiroaki SHITAMA, Ritsuo IMASHIRO
  • Patent number: 9302996
    Abstract: This is to provide a continuous arycyclic compound having a DGAT1 inhibitory activity, and useful for prophylaxis and/or treatment of obesity or hyperlipidemia caused by obesity, hypertriglyceridemia, lipid metabolism disorder, fatty liver, hypertension, arteriosclerosis, diabetes, etc., as well as to provide a DGAT1 inhibitor comprising the continuous arycyclic compound or a pharmaceutically acceptable salt thereof as an effective ingredient. Disclosed is the continuous arycyclic compound is represented by the formula: wherein the substituents in the formula are the same as defined in the specification, or a pharmaceutically acceptable salt thereof.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: April 5, 2016
    Assignee: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Osamu Sakurai, Kunio Saruta, Norimitsu Hayashi, Takashi Goi, Kenji Morokuma, Hidekazu Tsujishima, Hiroaki Sawamoto, Hiroaki Shitama, Ritsuo Imashiro
  • Publication number: 20130261128
    Abstract: This is to provide a continuous arycyclic compound having a DGAT1 inhibitory activity, and useful for prophylaxis and/or treatment of obesity or hyperlipidemia caused by obesity, hypertriglyceridemia, lipid metabolism disorder, fatty liver, hypertension, arteriosclerosis, diabetes, etc., as well as to provide a DGAT1 inhibitor comprising the continuous arycyclic compound or a pharmaceutically acceptable salt thereof as an effective ingredient. Disclosed is the continuous arycyclic compound is represented by the formula: wherein the substituents in the formula are the same as defined in the specification, or a pharmaceutically acceptable salt thereof.
    Type: Application
    Filed: December 16, 2011
    Publication date: October 3, 2013
    Applicant: MITSUBISHI TANABE PHARMA CORPORATION
    Inventors: Osamu Sakurai, Kunio Saruta, Norimitsu Hayashi, Takashi Goi, Kenji Morokuma, Hidekazu Tsujishima, Hiroaki Sawamoto, Hiroaki Shitama, Ritsuo Imashiro