Patents by Inventor Katsuyuki Ogura

Katsuyuki Ogura 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).

  • Aromatic enaminosulfoxide derivatives
    Patent number: 4002682
    Abstract: Enaminosulfoxides of the formula, ##STR1## in which R.sup.1 is alkyl, dialkoxyalkyl, phenylalkyl, phenyl, halophenyl, alkylphenyl, alkoxyphenyl or dialkoxyphenyl groups, said alkyl and alkoxy each containing 1 to 4 carbon atoms, and each R.sup.2 is independently alkyl of 1 to 4 carbon atoms, phenyl, tolyl or chlorophenyl groups, wherein at least one of the R.sup.1 and R.sup.2 is aromatic. These compounds can be used to synthesize keto acid derivatives and acylamino acid esters which have well known utilities.
    Type: Grant
    Filed: March 6, 1975
    Date of Patent: January 11, 1977
    Assignee: Sagami Chemical Research Center
    Inventors: Genichi Tsuchihashi, Katsuyuki Ogura
  • .alpha.-Alkyl(or aryl)thio-5-hydroxytryptophan derivative and the preparation process thereof
    Patent number: 4001276
    Abstract: As a novel compound, an .alpha.-alkyl(or aryl)thio-5-hydroxytryptophan derivative and the preparation process thereof are disclosed. Said novel compound is readily convertible to 5-hydroxytryptophan having a versatile utilization.
    Type: Grant
    Filed: February 26, 1974
    Date of Patent: January 4, 1977
    Assignee: Sagami Chemical Research Center
    Inventors: Genichi Tsuchihashi, Katsuyuki Ogura
  • Method of preparing aldehydes
    Patent number: 3962281
    Abstract: A novel method for preparing substituted actaldehydes comprising subjecting a specific sulfoxide derivative to an acidic hydrolysis.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: June 8, 1976
    Assignee: Sagami Chemical Research Center
    Inventors: Genichi Tsuchihashi, Katsuyuki Ogura
  • Novel enaminosulfoxides and a process for their preparation
    Patent number: 3952044
    Abstract: An enaminousulfoxide of the formula, ##EQU1## in which R.sup.1 is a member of the group consisting of alkyl, dialkoxyalkyl, phenylalkyl, phenyl, halophenyl, alkylphenyl, alkoxyphenyl, and dialkoxyphenyl groups, said alkyl and alkoxy each containing 1 to 4 carbon atoms, and two R.sup.2 's are each independently selected from the group consisting of alkyl of 1 to 4 carbon atoms, phenyl, tolyl, and halophenyl groups, and process for preparing the same.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: April 20, 1976
    Assignee: Sagami Chemical Research Center
    Inventors: Genichi Tsuchihashi, Katsuyuki Ogura