Patents by Inventor Junzo Nogami

Junzo Nogami 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).

  • Process for preparing cephalosporin compounds
    Patent number: 4665166
    Abstract: A process for preparing cephalosporin compounds represented by the formula ##STR1## wherein R.sup.1 represents an alkyl group, alkenyl group, substituted or unsubstituted aryl group, substituted or unsubstituted arylmethyl group or substituted or unsubstituted phenoxymethyl group, R.sup.2 represents a carboxyl group or protected carboxyl group, and Y represents the residue of a nucleophilic reagent.
    Type: Grant
    Filed: May 1, 1984
    Date of Patent: May 12, 1987
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Shigeru Torii, Hideo Tanaka, Junzo Nogami, Michio Sasaoka, Norio Saito, Takashi Shiroi
  • Bicyclic azetidinone intermediates
    Patent number: 4656264
    Abstract: An azetidinone compound represented by the formula ##STR1## wherein R.sup.1 represents a substituted or unsubstituted phenyl group, R.sup.2 represents a carboxyl-protecting group, X represents a hydrogen atom or chlorine atom and Y represents --I, --ONO.sub.2, --OH, ##STR2## or --SR.sup.4 in which R.sup.3 is a lower alkyl group or --OR.sup.5 (wherein R.sup.5 is a halogen-containing lower alkyl group) and R.sup.4 is a substituted or unsubstituted, 5-membered aromatic heterocyclic residue containing sulphur and/or nitrogen atom or atoms.
    Type: Grant
    Filed: April 29, 1986
    Date of Patent: April 7, 1987
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Shigeru Torii, Hideo Tanaka, Junzo Nogami, Michio Sasaoka, Norio Saito, Takashi Shiroi
  • Process for preparing azetidinone derivatives
    Patent number: 4622178
    Abstract: A process for preparing an azetidinone derivative represented by the formula ##STR1## wherein R.sup.1 represents a straight-chain or branched-chain lower alkyl group, substituted or unsubstituted aryl group, substituted or unsubstituted phenylmethyl group or substituted or unsubstituted phenyloxymethyl group, R.sup.2 represents hydrogen atom, an optionally substituted hydrocarbon residue or protective group for amino group selected from the class consisting of acyl, silyl, sulfonyl and phosphonyl derived from organic or inorganic acid, and R.sup.3 represents a substituted or unsubstituted aryl group or the residue of substituted or unsubstituted heterocyclic ring.
    Type: Grant
    Filed: May 1, 1984
    Date of Patent: November 11, 1986
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Shigeru Torii, Hideo Tanaka, Junzo Nogami, Michio Sasaoka, Norio Saito, Takashi Shiroi
  • 2-substituted cephem derivatives and process for preparing the same
    Patent number: 4604457
    Abstract: A 2-substituted cephem derivative represented by the formula ##STR1## wherein R.sup.1 represents a substituted or unsubstituted phenyl group, substituted or unsubstituted phenylmethyl group or substituted or unsubstituted phenoxymethyl group, R.sup.2 represents hydrogen atom or protective group for carboxylic acid and Y represents allyloxy group, benzyloxy group, alkylthio group, carboxyalkylthio group or group of the formula ##STR2## wherein R.sup.4 represents hydrogen atom or lower alkyl group, X represents --O--, --S-- or ##STR3## R.sup.5 represents hydrogen atom, a lower alkyl group or phenyl group and R.sup.6 represents hydrogen atom or lower alkyl group, and a process for preparing the derivatives.
    Type: Grant
    Filed: May 8, 1984
    Date of Patent: August 5, 1986
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Shigeru Torii, Hideo Tanaka, Junzo Nogami, Michio Sasaoka, Norio Saito, Takashi Shiroi