Patents by Inventor Rei Okazaki

Rei Okazaki 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).

  • Intermediate of 6-substituted 1-methyl-1-H-benzimidazole derivative and method for producing same
    Patent number: 7816552
    Abstract: A method for preparing a compound having the following formula (I) by reducing a nitro group of the following formula (III) followed by carrying out an intramolecular dehydration condensation, wherein R2 is hydrogen, alkyl, cycloalkyl, phenyl or a 5- or 6-membered heterocyclic, and X is oxygen, sulfur or nitrogen.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: October 19, 2010
    Assignee: Sankyo Company, Limited
    Inventors: Hisaki Kajino, Hiroshi Miyamoto, Rei Okazaki, Yutaka Ikeuchi
  • Intermediate of 6-Substituted 1-Methyl-1-H-Benzimidazole Derivative and Method for Producing Same
    Publication number: 20090023929
    Abstract: A method for preparing a compound having the following formula (I) by reducing a nitro group of the following formula (III) followed by carrying out an intramolecular dehydration condensation, wherein R2 is hydrogen, alkyl, cycloalkyl, phenyl or a 5- or 6-membered heterocyclic, and X is oxygen, sulfur or nitrogen.
    Type: Application
    Filed: September 26, 2005
    Publication date: January 22, 2009
    Inventors: Hisaki Kajino, Hiroshi Miyamoto, Rei Okazaki, Yutaka Ikeuchi
  • Process for production of high-purity enamines
    Patent number: 7411095
    Abstract: A method for producing highly pure enamines, which comprises reacting an aldehyde or ketone with an amine and treating the resulting reaction mixture with an acidic aqueous solution at a temperature between 0° C. and 30° C.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: August 12, 2008
    Assignee: Sankyo Company, Limited
    Inventors: Rei Okazaki, Shunshi Kojima, Hideharu Yokokawa
  • Process for the production of ?-keto acetals
    Patent number: 7176323
    Abstract: A process for the production of a ?-ketoacetal compound wherein the desired product is obtained by a simple procedure in a high yield as a high purity product. The reaction scheme for the process is as follows: wherein Ar is an aryl group; X is a halogen atom; Ra and Rb is an alkyl or alkoxy group; and W is an alkylene group.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: February 13, 2007
    Assignee: Sankyo Company, Limited
    Inventors: Rei Okazaki, Shunshi Kojima
  • Process for the production of gamma-keto acetals
    Publication number: 20050148780
    Abstract: A process for the production of a ?-ketoacetal compound wherein the desired product is obtained by a simple procedure in a high yield as a high purity product. The reaction scheme for the process is as follows: wherein Ar is an aryl group; X is a halogen atom; Ra and Rb is an alkyl or alkoxy group; and W is an alkylene group.
    Type: Application
    Filed: February 9, 2005
    Publication date: July 7, 2005
    Applicant: SANKYO COMPANY, LIMITED
    Inventors: Rei Okazaki, Shunshi Kojima
  • Process for production of high-purity enamines
    Publication number: 20050143576
    Abstract: A method for producing highly pure enamines, which comprises reacting an aldehyde or ketone with an amine and treating the resulting reaction mixture with an acidic aqueous solution at a temperature between 0° C. and 30° C.
    Type: Application
    Filed: January 18, 2005
    Publication date: June 30, 2005
    Applicant: SANKYO COMPANY, LIMITED
    Inventors: Rei Okazaki, Shunshi Kojima, Hideharu Yokokawa