Patents by Inventor Masao Sakairi

Masao Sakairi 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: 20240091195
    Abstract: A medicine includes glycopyrronium salicylate or a solvate thereof, wherein the medicine is used for treating or preventing sialorrhea and the like. A therapeutic drug enables the treatment of sialorrhea by affixing and a novel salt of glycopyrronium is suitable for a transdermal absorptive preparation.
    Type: Application
    Filed: February 4, 2022
    Publication date: March 21, 2024
    Applicant: SANWA KAGAKU KENKYUSHO CO., LTD.
    Inventors: Kazuhiro UECHI, Masao SAKAIRI, Sou SUGITANI, Nobutaka MORIMOTO, Kazuki TAKADA, Takehiko NAKAMURA
  • Publication number: 20150239890
    Abstract: An object is to provide a crystal of anagliptin, which has a high purity and is excellent in stability, low in hygroscopicity, and has a characteristic of easily dissolving into water, and a method for producing the crystal. An anagliptin crystal showing a powder X-ray diffraction pattern substantially the same as in FIG. 1, which has peaks around at 9.8°, 17.4°, 18.6°, 25.3°, and 25.8° as diffraction angles represented by 2?. The crystal is obtained by reacting N-(2-amino-2-methylpropyl)-2-methylpyrazolo[1,5-a]pyrimidine-6-carboxamide and (2S)—N-chloroacetyl-2-cyanopyrrolidine in an organic solvent, thereafter purifying the reaction solution by column chromatography to thus obtain an amorphia of anagliptin, and crystallizing the amorphia of anagliptin from 2-propanol.
    Type: Application
    Filed: August 27, 2013
    Publication date: August 27, 2015
    Applicant: SANWA KAGAKU KENKYUSHO CO., LTD.
    Inventors: Masao Sakairi, Hideaki Inagaki, Mitsuru Oka, Takayo Murase
  • Publication number: 20120101137
    Abstract: The object of the present invention is to provide a compound having a glucokinase-activating effect. A pharmaceutical composition comprising a compound represented by the general formula (I) or a pharmaceutically acceptable salt thereof as an active ingredient: wherein X means a nitrogen atom or CR6, wherein R6 means a hydrogen atom or a halogen atom; R1 means a hydrogen atom, a C1-C6 alkyl group, a C1-C6 alkoxy group or a C1-C6 alkylthio group; R2 means a hydrogen atom or a fluorine atom; R3 means a hydrogen atom or a C1-C6 alkyl group; and one of R4 and R5 means a hydrogen atom or a C1-C6 alkyl group, and the other means a C1-C6 alkylenecarboxylic acid, a C1-C6 alkylsulfonyl group, a C1-C6 alkylcarbonyl group, or CONH2.
    Type: Application
    Filed: June 26, 2010
    Publication date: April 26, 2012
    Applicant: SANWA KAGAKU KENKYUSHO CO., LTD.
    Inventors: Tokuyuki Yamashita, Kaori Chikamatsu, Naoki Takahashi, Hisakazu Iwai, Masakazu Kogami, Masao Sakairi, Nobuhide Watanabe, Hiroki Fujieda, Daisuke Kataoka, Mitsuhiro Makino, Noriyasu Kato, Toshiyuki Miyazawa, Kazushige Nagai, Nobuyoshi Kasugai, Hiroyo Kataoka, Naoki Hiramatsu, Nobuaki Tsuruta, Yurie Yamada, Mika Miyoshi, Sei Murakami, Izumi Goto, Tohru Izuchi, Kimie Suzuki, Satoko Harada, Martin Lang, Markus Hans-Juergen Seifert, Kristina Kaarina Wolf
  • Patent number: 7345180
    Abstract: A dipeptidyl peptidase IV inhibitor which is satisfactory in respect of activity, stability and safety and has an excellent action as a pharmaceutical agent. A compound represented by the following general formula or a pharmaceutically acceptable salt thereof: wherein R1 and R2 each represents hydrogen, an optionally substituted C1-6 alkyl group, or —COOR5 whereupon R5 represents hydrogen or an optionally substituted C1-6 alkyl group, or R1, R2, and a carbon atom together represent a 3- to 6-membered cycloalkyl group, R3 represents hydrogen or an optionally substituted C6-10 aryl group, R4represents a hydrogen or a cyano group, D represents —CONR6-, —CO— or —NR6CO—, R6 represents hydrogen or an optionally substituted C1-6 alkyl group, E represents —(CH2)m— whereupon m is 1 to 3, —CH2OCH2—, or —SCH2—, n is 0 to 3, and A represents an optionally substituted bicyclic heterocyclic group or bicyclic hydrocarbon group.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: March 18, 2008
    Assignee: Sanwa Kagaku Kenkyusho Co., Ltd.
    Inventors: Takuji Kakigami, Mitsuru Oka, Noriyasu Katoh, Masahiro Yoshida, Masahiro Shirai, Toru Murase, Masao Sakairi, Takayo Murase, Mitsuaki Takeuchi, Yuji Hayashi, Motohiro Takeda, Mitsuhiro Makino
  • Publication number: 20060229286
    Abstract: A dipeptidyl peptidase IV inhibitor which is satisfactory in respect of activity, stability and safety and has an excellent action as a pharmaceutical agent. A compound represented by the following general formula or a pharmaceutically acceptable salt thereof: wherein R1 and R2 each represents hydrogen, an optionally substituted C1-6 alkyl group, or —COOR5 whereupon R5 represents hydrogen or an optionally substituted C1-6 alkyl group, or R1, R2, and a carbon atom together represent a 3- to 6-membered cycloalkyl group, R3 represents hydrogen or an optionally substituted C6-10 aryl group, R4 represents a hydrogen or a cyano group, D represents —CONR6—, —CO— or —NR6CO—, R6 represents hydrogen or an optionally substituted C1-6 alkyl group, E represents —(CH2)m— whereupon m is 1 to 3, —CH2OCH2—, or —SCH2—, n is 0 to 3, and A represents an optionally substituted bicyclic heterocyclic group or bicyclic hydrocarbon group.
    Type: Application
    Filed: January 30, 2004
    Publication date: October 12, 2006
    Inventors: Takuji Kakigami, Mitsuru Oka, Noriyasu Katoh, Masahiro Yoshida, Masahiro Shirai, Toru Murase, Masao Sakairi, Takayo Murase, Mitsuaki Takeuchi, Yuji Hayashi, Motohiro Takeda, Mitsuhiro Makino