Patents by Inventor Hiroshi Iwane

Hiroshi Iwane 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 producing indoles
    Patent number: 4757152
    Abstract: A process for producing an indole by catalytic reaction of a 2-(o-aminoaryl)ethanol, said reaction being carried out by heating in a liquid phase in the presence of an alkali metal using a catalyst containing a metal selected from the group consisting of a platinum-group metal, nickel and copper.The process is industrially advantageous in that indoles are produced in high yield.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: July 12, 1988
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Makoto Imanari, Hiroshi Iwane, Katsuhumi Kuzira, Takatoshi Seto
  • 4,8-dimethylbicyclo(3.3.1)nonane derivatives
    Patent number: 4700008
    Abstract: There is disclosed a novel 4,8-dimethylbicyclo[3.3.1]nonane derivative represented by the formula [I]: ##STR1## wherein X and Y have the same meanings as defined in the specification. The compound of the present invention has an unique and strong perfume and hence is expected to be useful as perfumery.
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: October 13, 1987
    Assignee: Mitsubishi Yuka Fine Chemicals Co., Ltd.
    Inventors: Makoto Takeda, Hiroshi Iwane, Akira Yoshida, Teruo Mori
  • Process for the preparation of indoles
    Patent number: 4659841
    Abstract: A process for preparing indoles in high yield by reacting anilines and 1,2-glycols in a liquid phase in the presence of a cadmium bromide or iodide/potassium bromide or iodide catalyst. The used catalyst can be easily recovered and when reused, exhibits excellent performance.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: April 21, 1987
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Makoto Imanari, Hiroshi Iwane, Katsufumi Kuzira, Takatoshi Seto
  • Process for producing tert-amylphenols
    Patent number: 4568778
    Abstract: A process for producing tert-amylphenols is described, comprising reacting isoamylene with phenols in the presence of an inorganic solid acid catalyst or an acidic ion exchange resin catalyst. This process permits efficient production of tert-amylphenols, i.e., 2,4-di-tert-amylphenol and p-tert-amylphenol. These tert-amylphenols are useful as starting materials for preparation of color formers for color photography, additives for resins, oil-soluble dyes, additives for lubricating oils, etc.
    Type: Grant
    Filed: February 7, 1985
    Date of Patent: February 4, 1986
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Makoto Imanari, Hiroshi Iwane, Takahiro Sugawara, Tadashi Ayusawa, Tadamichi Aoki
  • Process for producing 4,4'-dihydroxydiphenyls
    Patent number: 4564713
    Abstract: A process for producing 4,4'-dihydroxydiphenyls is disclosed, which comprises dimerizing alkylphenols in an aqueous solution of pH 7 to 12 containing a surfactant in the presence of an oxidizing agent, wherein the dimerization is conducted in the presence of a copper compound and a basic boron compound or a mixture of a basic substance and a boron compound. According to this process, the desired 4,4'-dihydroxydiphenyls can be easily obtained in high yield.
    Type: Grant
    Filed: January 11, 1985
    Date of Patent: January 14, 1986
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Makoto Imanari, Hiroshi Iwane, Takahiro Sugawara
  • Substituted aryl ethylenes
    Patent number: 4329507
    Abstract: New substituted aryl ethylenes are disclosed which are produced by dehydration of the corresponding .alpha.- or .beta.-(substituted aryl)ethyl alcohols or by dehydrohalogenation of the corresponding .alpha.- or .beta.-(substituted aryl)ethyl halides.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: May 11, 1982
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Makoto Takeda, Masayuki Uchide, Hiroshi Iwane
  • Process for producing biphenyl derivatives
    Patent number: 4263457
    Abstract: A process for producing a halobiphenyl derivative represented by the following formula (I) comprises dehydrogenating a cyclohexylhalobenzene represented by the following formula (II) under such conditions that substantially no dehalogenation occurs. ##STR1## wherein X represents a halogen atom, and each of R.sup.1 and R.sup.2 independently represents a group represented by the formula ##STR2## wherein A represents carboxyl or an alkoxycarbonyl group and R represents a hydrogen atom or a lower alkyl group; an alkylcarbonyl; alkenyl; alkynyl; alkyl; aryl; arylcarbonyl; hydroxyalkyl; cyanoalkyl or cyanoalkenyl group.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: April 21, 1981
    Assignee: Mitsubishi Petrochemical Company, Ltd.
    Inventors: Makoto Takeda, Eiji Taniyama, Yuji Ozawa, Makoto Imanari, Kunimasa Takahashi, Hiroshi Iwane
  • Tetrahydrofuranol derivative
    Patent number: 4261904
    Abstract: A tetrahydrofuranol compound of the general formula: ##STR1## wherein R is H or or tautomer thereof; and a method for preparing the same.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: April 14, 1981
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Makoto Takeda, Hiroshi Iwane, Takashi Hashimoto
  • Novel hexahydrobenzopyran derivative and method of preparing the same
    Patent number: 4233226
    Abstract: 4a,5,6,7,8,8a-Hexahydro-4,7-dimethyl-4H-1-benzopyran of the formula: ##STR1## and a method for preparing the same.
    Type: Grant
    Filed: August 24, 1979
    Date of Patent: November 11, 1980
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Makoto Takeda, Hiroshi Iwane, Takashi Hashimoto