Patents by Inventor Fukashi Horiuchi

Fukashi Horiuchi 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 cis-chrysanthemic acid
    Patent number: 3989654
    Abstract: A novel process for preparing cis-chrysanthemic acid comprising (1) hydrolysis of trans-.delta.-halogenodihydrochrysanthemic acid or ester thereof under neutrally kept condition with an alkaline earth metal carbonate, (2) conversion of the obtained trans-.delta.-hydroxydihydrochrysanthemic acid ester into a mixture of cis-chrysanthemic acid and iso-cis-chrysanthemic acid by reacting with a strong base, and (3) separation of the cis-chrysanthemic acid from the mixture by selective conversion of the iso-cis-chrysanthemic acid with water in the presence of an acid catalyst into cis-dihydrochrysanthemolactone, followed by separation of the cis-chrysanthemic acid from the lactone with a caustic alkali and an acid.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: November 2, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshiko Honda, Nobushige Itaya, Akio Higo, Fukashi Horiuchi
  • Racemization of optically active allethrolone
    Patent number: 3981919
    Abstract: A process is provided for preparing racemic allethrolone which comprises reacting (-) allethrolone with phosphorus chloride compounds in the presence of a Lewis acid, and hydrolyzing the racemic 4-chloro-allethrone thus obtained.
    Type: Grant
    Filed: January 22, 1975
    Date of Patent: September 21, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takeaki Umemura, Fukashi Horiuchi
  • Preparation of optically active allethrorone via allethronyl acid phthalate
    Patent number: 3947519
    Abstract: The present invention relates to a process for preparing allethrolone which involves hydrolyzing 2-allyl-4-hydroxy-3-methyl-2-cyclopentenone acid phthalate represented by the formula ##SPC1##In water or an aqueous solvent with or without a base of less than a small excess of the equivalent.
    Type: Grant
    Filed: March 28, 1974
    Date of Patent: March 30, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masanao Matsui, Fukashi Horiuchi, Hajime Hirai, Nobushige Itaya
  • Preparation of optically active allethrorone via allethronyl acid phthalate
    Patent number: 3931291
    Abstract: Optically active allethronyl acid phthalate is prepared by reacting (.+-.)-allethronyl acid phthalate of the formula ##SPC1##With an optically active amine from the group of .alpha.-phenylethylamine of the formula, ##SPC2##.alpha.-phenyl-.beta.-p-tolylethylamine of the formula ##SPC3##Threo-2-dimethylamino-1-(p-nitrophenyl)-1,3-propanediol of the formula ##SPC4##And naphthylethylamine of the formula ##SPC5##To form diastereomeric salts thereof, and decomposing the resolved salt to obtain the optically active allethronyl acid phthalate.
    Type: Grant
    Filed: March 22, 1974
    Date of Patent: January 6, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventor: Fukashi Horiuchi