Patents by Inventor Daisuke Uraguchi

Daisuke Uraguchi 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: 8399706
    Abstract: A chiral tetraaminophosphonium salt represented by formula (1) and a method for producing chiral ?-nitroalcohol comprising reacting an aldehyde or a ketone and a nitroalkane in the presence of the chiral tetraaminophosphonium salt represented by formula (1) and a base, or in the presence of a conjugated base of the chiral tetraaminophosphonium salt represented by formula (1): wherein R1 to R4 are independently a hydrogen atom or a monovalent hydrocarbon group; and, R1 and R2 are different groups or R3 and R4 are different groups.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: March 19, 2013
    Assignees: Mitsui Chemicals, Inc., National University Corporation Nagoya University
    Inventors: Takashi Ooi, Daisuke Uraguchi
  • Patent number: 7981318
    Abstract: Provided is a reaction reagent for trifluoromethylation with high general versatility and good efficiency. The reaction reagent for trifluoromethylation contains an iron compound, trifluoromethyl iodide, a sulfoxide and a peroxide, and may further contain an acid. The iron compound is, for example, iron(II) sulfate, ammonium iron(II) sulfate, iron(II) tetrafluoroborate, ferrocene, bis(?5-pentamethylcyclopentadienyl)iron or an iron powder; the sulfoxide is, for example, dimethyl sulfoxide; the peroxide is, for example, hydrogen peroxide or hydrogen peroxide-urea composite; and the acid is, for example, sulfuric acid, tetrafluoroboric acid or trifluoromethanesulfonic acid.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: July 19, 2011
    Assignees: Sagami Chemical Research Center, Tosoh F-Tech, Inc.
    Inventors: Tetsu Yamakawa, Kyoko Yamamoto, Daisuke Uraguchi, Kenji Tokuhisa
  • Patent number: 7902207
    Abstract: A process for producing an amine which is characterized by reacting an imine with a nucleophilic compound (except a trialkylsilyl vinyl ether) in the presence of a phosphoric acid derivative represented by the formula (1): wherein A1 represents a spacer; X1 and X2 represent each independently a divalent nonmetal atom or a divalent nonmetal atomic group; and Y1 is oxygen or sulfur. The invention provides a process by which amines (particularly optically active amines) useful as intermediates of medicines, agricultural chemicals, or the like can be produced without special post-treatment in high yield at high optical purity; and phosphoric acid derivatives (particularly optically active phosphoric acid derivatives) useful in the production of the amines.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: March 8, 2011
    Assignee: Takasago International Corporation
    Inventors: Masahiro Terada, Daisuke Uraguchi, Keiichi Sorimachi, Hideo Shimizu
  • Patent number: 7884202
    Abstract: Nucleobases are perfluoroalkylated in a one step process with a perfluoroalkyl halide in the presence of a sulfoxide, a peroxide and an iron compound. Compounds so produced are useful as medicinal drugs, intermediates for medicinal drugs and agricultural chemicals.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: February 8, 2011
    Assignees: Tosoh Corporation, Tosoh F-Tech, Inc., Sagami Chemical Research Center
    Inventors: Tetsu Yamakawa, Kyoko Yamamoto, Daisuke Uraguchi, Kenji Tokuhisa
  • Publication number: 20100230633
    Abstract: Provided is a reaction reagent for trifluoromethylation with high general versatility and good efficiency. The reaction reagent for trifluoromethylation contains an iron compound, trifluoromethyl iodide, a sulfoxide and a peroxide, and may further contain an acid. The iron compound is, for example, iron(II) sulfate, ammonium iron(II) sulfate, iron(II) tetrafluoroborate, ferrocene, bis(?5-pentamethylcyclopentadienyl)iron or an iron powder; the sulfoxide is, for example, dimethyl sulfoxide; the peroxide is, for example, hydrogen peroxide or hydrogen peroxide-urea composite; and the acid is, for example, sulfuric acid, tetrafluoroboric acid or trifluoromethanesulfonic acid.
    Type: Application
    Filed: November 6, 2007
    Publication date: September 16, 2010
    Inventors: Tetsu Yamakawa, Kyoko Yamamoto, Daisuke Uraguchi, Kenji Tokuhisa
  • Publication number: 20090131716
    Abstract: A chiral tetraaminophosphonium salt represented by formula (1) and a method for producing chiral ?-nitroalcohol comprising reacting an aldehyde or a ketone and a nitroalkane in the presence of the chiral tetraaminophosphonium salt represented by formula (1) and a base, or in the presence of a conjugated base of the chiral tetraaminophosphonium salt represented by formula (1): wherein R1 to R4 are independently a hydrogen atom or a monovalent hydrocarbon group; and, R1 and R2 are different groups or R3 and R4 are different groups.
    Type: Application
    Filed: September 17, 2008
    Publication date: May 21, 2009
    Applicants: Mitsui Chemicals, Inc., National University Corporation Nagoya University
    Inventors: Takashi OOI, Daisuke URAGUCHI
  • Publication number: 20090124796
    Abstract: Provided is a simple and efficient production process of a nucleobase having a perfluoroalkyl group. A nucleobase (for example, uracils, cytosines, adenines, guanines, hypoxanthines, xanthines, or the like) is reacted with a perfluoroalkyl halide in the presence of a sulfoxide, a peroxide and an iron compound to produce a perfluoroalkyl-substituted nucleobase, which is useful as an intermediate for medical drugs, economically.
    Type: Application
    Filed: November 6, 2006
    Publication date: May 14, 2009
    Inventors: Tetsu Yamakawa, Kyoko Yamamoto, Daisuke Uraguchi, Kenji Tokuhisa
  • Publication number: 20070142639
    Abstract: A process for producing an amine which is characterized by reacting an imine with a nucleophilic compound (except a trialkylsilyl vinyl ether) in the presence of a phosphoric acid derivative represented by the formula (1): wherein A1 represents a spacer; X1 and X2 represent each independently a divalent nonmetal atom or a divalent nonmetal atomic group; and Y1 is oxygen or sulfur. The invention provides a process by which amines (particularly optically active amines) useful as intermediates of medicines, agricultural chemicals, or the like can be produced without special post-treatment in high yield at high optical purity; and phosphoric acid derivatives (particularly optically active phosphoric acid derivatives) useful in the production of the amines.
    Type: Application
    Filed: January 26, 2005
    Publication date: June 21, 2007
    Inventors: Masahiro Terada, Daisuke Uraguchi, Keiichi Sorimachi, Hideo Shimizu