Patents by Inventor Kenji Uneyama

Kenji Uneyama 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: 6380415
    Abstract: A process for producing an octafluoro[2,2]paracyclophane includes the steps of (a) reacting 1,4-bis(trifluoromethyl)benzene with a halogenated silane represented by the general formula (1), in the presence of a low valence metal, thereby obtaining a novel compound (precursor) represented by the general formula (2); and (b) conducting in the presence of a fluoride ion a dimerization of the compound into the octafluoro[2,2]paracyclophane, R3SiX  (1) where each R is independently an alkyl group or aryl group, and X is a halogen atom, where R is defined as above. It is possible to produce octafluoro[2,2]paracyclophane with a high yield from 1,4-bis(trifluoromethyl)benzene, which is easily available, via the above compound.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: April 30, 2002
    Assignee: Central Glass Company, Limited
    Inventors: Kenji Uneyama, Hideki Amii
  • Publication number: 20010044561
    Abstract: A process for producing an octafluoro[2,2]paracyclophane includes the steps of (a) reacting 1,4-bis(trifluoromethyl)benzene with a halogenated silane represented by the general formula (1), in the presence of a low valence metal, thereby obtaining a novel compound (precursor) represented by the general formula (2); and (b) conducting in the presence of a fluoride ion a dimerization of the compound into the octafluoro[2,2]paracyclophane,
    Type: Application
    Filed: February 14, 2001
    Publication date: November 22, 2001
    Inventors: Kenji Uneyama, Hideki Amii
  • Patent number: 4853468
    Abstract: This invention provides azetidinone derivatives represented by the formula ##STR1## and processes for preparing the same. The azetidinone derivatives are used as the intermediates for producing cephalosporin compounds useful as antibiotic agents.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: August 1, 1989
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Sigeru Torii, Kenji Uneyama, Hideo Tanaka, Junzo Nokami, Michio Sasaoka, Norio Saito, Takashi Shiroi
  • Patent number: 4784734
    Abstract: This invention provides azetidinone derivatives represented by the formula ##STR1## and processes for preparing the same. The azetidinone derivatives are used as the intermediates for producing cephalosporin compounds useful as antibiotic agents.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: November 15, 1988
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Sigeru Torii, Kenji Uneyama, Hideo Tanaka, Junzo Nokami, Michio Sasaoka, Norio Saito, Takashi Shiroi
  • Patent number: 4689411
    Abstract: This invention provides azetidinone derivatives represented by the formula ##STR1## and processes for preparing the same. The azetidinone derivatives are used as the intermediates for producing cephalosporin compounds useful as antibiotic agents.
    Type: Grant
    Filed: May 15, 1986
    Date of Patent: August 25, 1987
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Sigeru Torii, Kenji Uneyama, Hideo Tanaka, Junzo Nokami, Michio Sasaoka, Norio Saito, Takashi Shiroi
  • Patent number: 4532077
    Abstract: This invention relates to novel thiazolineazetidinone-type compounds represented by the formula ##STR1## wherein R represents a hydrogen atom, alkyl group, alkyl group replaced with halogen atoms, methyl group replaced with substituted or unsubstituted phenyl groups, methyl replaced with halogen atoms, or trialkylsilyl group and Z represents O or Cl.sub.2.
    Type: Grant
    Filed: August 25, 1982
    Date of Patent: July 30, 1985
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Sigeru Torii, Kenji Uneyama, Hideo Tanaka, Junzo Nokami, Takashi Shiroi, Norio Saito
  • Patent number: 4336202
    Abstract: Novel cyclohexanone derivatives of general formula: ##STR1## (wherein R.sup.1 is a hydrocarbon group of 1 to 15 carbon atoms) and new cyclohexanone derivatives of general formula: ##STR2## (wherein R.sup.1 and R.sup.2 each is a hydrocarbon group of 1 to 15 carbon atoms) are produced by an electrooxidative coupling of 1,3-cyclohexanedione with a vinyl ether of general formula:CH.sub.2 .dbd.CH-O-R.sup.1(wherein R.sup.1 is as defined above) in the presence or absence of an alcohol of general formula:R.sup.2 OH(wherein R.sup.2 is as defined above). These new cyclohexanone derivatives can be easily converted to N-substituted or unsubstituted-4-oxo-4,5,6,7-tetrahydroindoles, which are of value as intermediates for the production of N-substituted or unsubstituted-4-hydroxyindoles and, thence, to pindolol and its analogs.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: June 22, 1982
    Assignee: Kuraray Co., Ltd.
    Inventors: Sigeru Torii, Kenji Uneyama, Takashi Onishi, Yoshiji Fujita, Michihiro Ishiguro, Takashi Nishida