Patents by Inventor Futoshi Masaki

Futoshi Masaki 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).

  • .alpha.,.alpha.-bis(trifluoromethyl)arylacetic acid ester; its intermediates for synthesis; and process for producing the same
    Patent number: 5808132
    Abstract: Heptafluoroisobutenyl methyl ether having the following formula: ##STR1## is oxidized with ozone to produce perfluoro(2-methyl-1,2-epoxy-propyl) methyl ether. The resulting intermediate compound is allowed to react with an aromatic compound ArH to produce .alpha.,.alpha.-bis(trifluoromethyl)arylacetic acid methyl ester having the following formula: ##STR2## By hydrolysis, decarboxylation and further hydrolysis of the ester compound, .alpha.,.alpha.-bis(trifluoromethyl)arylacetic acid for use as raw materials for medicines, agricultural chemicals, liquid crystals, etc. or reagents for determining an optical purity can be obtained.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: September 15, 1998
    Assignee: Nippon Mektron, Limited
    Inventors: Takehiro Sonoi, Toshimasa Sagawa, Futoshi Masaki, Toshio Kubota
  • Process for producing .alpha.-(trifluoromethyl)arylacetic acid
    Patent number: 5672742
    Abstract: .alpha.-(trifluoromethyl)arylacetic acid for use as raw materials for medicines, agricultural chemicals, liquid crystals etc. or reagents for determining an optical purity is readily obtained through very simple reaction steps, i.e. by reacting a perfluoro(2-methyl-1,2-epoxypropyl)ether compound obtainable by ozone, oxidation of a heptafluoroisobutenyl ether compound with an aromatic compound ArH to afford an .alpha.,.alpha.-bis(trifluoromethyl)arylacetic acid ester, followed by decarboxylation and hydrolysis of the resulting ester compound.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: September 30, 1997
    Assignee: Nippon Mektron Limited
    Inventors: Takehiro Sonoi, Futoshi Masaki, deceased, Toshio Kubota