Patents by Inventor Kenzo Sumi

Kenzo Sumi 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: 7164026
    Abstract: A polymer-carrying optically active binaphthyl type oxazoline compound having axial asymmetry, represented by the following general formula (1) (wherein R1 and R2 may be the same or different from each other and each represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms or the like; R3 is a hydrogen atom or —R5—X—R6; R4 is a hydrogen atom or the like; R5 is a straight- or branched-chain aliphatic hydrocarbon chain which may have a directly or indirectly bonded substituent; X is CH2, CO2, O, CONR7 or NR7; R6 is a directly or indirectly bonded polymer; and R7 is a hydrogen atom or the like), and to a transition metal complex which uses the compound as the ligand.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: January 16, 2007
    Assignee: Takasago International Corporation
    Inventors: Yasuhiro Uozumi, Heiko Hoche, Kenzo Sumi
  • Publication number: 20040097738
    Abstract: A polymer-carrying optically active binaphthyl type oxazoline compound having axial asymmetry, represented by the following general formula (1) 1
    Type: Application
    Filed: November 12, 2003
    Publication date: May 20, 2004
    Applicant: Takasago International Corporation
    Inventors: Yasuhiro Uozumi, Heiko Hoche, Kenzo Sumi
  • Patent number: 6403804
    Abstract: Disclosed is a process for preparing an optically active oxazolidinone derivative comprising allowing hydrazine to react on an optically active ester having a hydroxyl group at the 3-position which is represented by formula (II): wherein R1 represents a lower alkyl group having 1 to 4 carbon atoms, a phenyl group, a methoxymethyl group, a benzyloxymethyl group, a benzyloxycarbonylaminomethyl group which may have a substituent or substituents on the benzene ring thereof, an acylaminomethyl group having 3 to 10 carbon atoms, or an alkyloxycarbonylaminomethyl group having 3 to 6 carbon atoms; R2 and R3, which may be the same or different, each represent a hydrogen atom, a lower alkyl group having 1 to 4 carbon atoms, a phenyl group, an acetylaminomethyl group, a benzoylaminomethyl group, or a benzyl group; and * indicates an asymmetric carbon atom, and subjecting the resulting hydrazide to Curtius rearrangement.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: June 11, 2002
    Assignee: Takasago International Corporation
    Inventors: Kenzo Sumi, Takashi Imai, Shigeru Mitsuhashi, Hideki Nara, Takashi Miura
  • Publication number: 20020052515
    Abstract: Provided are a novel ammonium (3R,5S)-3,5,6-trihydroxyhexanoate derivative represented by the following formula (I): 1
    Type: Application
    Filed: August 16, 2001
    Publication date: May 2, 2002
    Applicant: TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Kenzo Sumi, Toshiyuki Murayama, Yoshiharu Gonda, Hideki Nara, Takashi Moroi
  • Patent number: 6365755
    Abstract: Provided are a novel ammonium (3R,5S)-3,5,6-trihydroxyhexanoate derivative represented by the following formula (I): wherein R1 represents a benzyl group which may have a substituent, a triphenylmethyl group which may have a substituent, an organosilyl group or a C1-5 acyl group; and A means a specific amine; and a preparation process of the derivative.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: April 2, 2002
    Assignee: Takasago International Corporation
    Inventors: Kenzo Sumi, Toshiyuki Murayama, Yoshiharu Gonda, Hideki Nara, Takashi Moroi
  • Patent number: 6323353
    Abstract: The invention provides a metal complex comprising a ligand and a metal. The ligand is an aminophosphine compound represented by the following formula (1) The metal is rhodium, ruthenium, iridium or nickel.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: November 27, 2001
    Assignee: Takasago International Corporation
    Inventors: Kenzo Sumi, Ryoji Noyori, Takao Ikariya