Patents by Inventor Masayo Sakai

Masayo Sakai 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).

  • NOVEL CYCLIC DEPSIPEPTIDE DERIVATIVES AND HARMFUL ORGANISM CONTROL AGENTS COMPRISING THE SAME
    Publication number: 20170215422
    Abstract: An objective of the present invention is to provide novel cyclic depsipeptide derivatives and harmful organism control agents including the same as each other. Specifically, the present invention provides compounds represented by formula (1) or stereoisomers thereof, harmful organism control agents containing them, and a process for producing them.
    Type: Application
    Filed: April 17, 2017
    Publication date: August 3, 2017
    Inventors: Masaaki MITOMI, Masayo SAKAI, Ryo HORIKOSHI, Yasumichi ONOZAKI, Satoshi NAKAMURA, Satoshi OMURA, Toshiaki SUNAZUKA, Tomoyasu HIROSE, Kazuro SHIOMI, Rokuro MASUMA
  • NOVEL CYCLIC DEPSIPEPTIDE DERIVATIVES AND HARMFUL ORGANISM CONTROL AGENTS COMPRISING THE SAME
    Publication number: 20150166608
    Abstract: An objective of the present invention is to provide novel cyclic depsipeptide derivatives and harmful organism control agents including the same as each other. Specifically, the present invention provides compounds represented by formula (1) or stereoisomers thereof, harmful organism control agents containing them, and a process for producing them.
    Type: Application
    Filed: June 13, 2013
    Publication date: June 18, 2015
    Inventors: Masaaki Mitomi, Masayo Sakai, Ryo Horikoshi, Yasumichi Onozaki, Satoshi Nakamura, Satoshi Omura, Toshiaki Sunazuka, Tomoyasu Hirose, Kazuro Shiomi, Rokuro Masuma
  • Process for producing pyripyropene derivatives and intermediates for the production thereof
    Patent number: 8759529
    Abstract: A process for producing compound C represented by formula C is disclosed: wherein R? represents substituent groups as described herein. The process can produce pyripyropene derivatives that have acyloxy groups at the 1- and 11-positions and a hydroxyl group at the 7-position and are useful as insect pest control agents at a high yield.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: June 24, 2014
    Assignee: BASF SE
    Inventors: Kimihiko Goto, Kazumi Yamamoto, Masayo Sakai, Masaaki Mitomi, Takashi Ando
  • PROCESS FOR PRODUCING PYRIPYROPENE DERIVATIVES AND INTERMEDIATES FOR THE PRODUCTION THEREOF
    Publication number: 20120330021
    Abstract: A process for producing compound C represented by formula C is disclosed: wherein R? represents substituent groups as described herein. The process can produce pyripyropene derivatives that have acyloxy groups at the 1- and 11-positions and a hydroxyl group at the 7-position and are useful as insect pest control agents at a high yield.
    Type: Application
    Filed: August 13, 2012
    Publication date: December 27, 2012
    Inventors: Kimihiko Goto, Kazumi Yamamoto, Masayo Sakai, Masaaki Mitomi, Takashi Ando
  • Process for producing pyripyropene derivatives and intermediates for the production thereof
    Patent number: 8263778
    Abstract: Disclosed is a process for producing compound C represented by formula C: wherein R? represents straight chain, branched chain, or cyclic C2-6 alkylcarbonyl, wherein R1b is used as a protective group for hydroxyl at the 7-position of compound C.
    Type: Grant
    Filed: August 13, 2008
    Date of Patent: September 11, 2012
    Assignee: Meiji Seika Pharma Co., Ltd.
    Inventors: Kimihiko Goto, Kazumi Yamamoto, Masayo Sakai, Masaaki Mitomi, Takashi Ando
  • PROCESS FOR PRODUCING PYRIPYROPENE DERIVATIVES AND INTERMEDIATES FOR THE PRODUCTION THEREOF
    Publication number: 20100160640
    Abstract: Disclosed is a process for producing compound C represented by formula C: wherein R? represents straight chain, branched chain, or cyclic C2-6 alkylcarbonyl, wherein R1b is used as a protective group for hydroxyl at the 7-position of compound C.
    Type: Application
    Filed: August 13, 2008
    Publication date: June 24, 2010
    Inventors: Kimihiko Goto, Kazumi Yamamoto, Masayo Sakai, Masaaki Mitomi, Takashi Ando
  • Halogen-substituted quinoline derivatives and ectoparasite control agent
    Patent number: 7022855
    Abstract: An objective of the present invention is to provide an ectoparasite control agent for homothermic animals, which has high control effect and is safe. The compounds according to the present invention are compounds represented by formula (I) and salts thereof: wherein R1 represents optionally substituted alkyl; optionally substituted alkenyl; optionally substituted alkynyl; OR5 wherein R5 represents optionally substituted alkyl, optionally substituted alkenyl, or optionally substituted alkynyl; or SR5 wherein R5 is as defined above, R2 represents optionally substituted alkyl, any one of R3 and R4 represents hydrogen and the other represents fluorine, chlorine, bromine, or CF3, and X represents fluorine or chlorine.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: April 4, 2006
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Kazumi Yamamoto, Kazuhiko Oyama, Masayo Sakai, Ryo Horikoshi
  • Halogen-substituted quinoline derivatives and ectoparasite control agent
    Publication number: 20040087618
    Abstract: An objective of the present invention is to provide an ectoparasite control agent for homothermic animals, which has high control effect and is safe.
    Type: Application
    Filed: October 9, 2003
    Publication date: May 6, 2004
    Applicant: Meiji Seika Kaisha, Ltd.
    Inventors: Kazumi Yamamoto, Kazuhiko Oyama, Masayo Sakai, Ryo Horikoshi