Patents by Inventor Susumu Akutagawa

Susumu Akutagawa 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).

  • Rhodium-phosphine complex
    Patent number: 4605750
    Abstract: A novel rhodium-phosphine complex represented by the formula (I):[Rh(BINAP).sub.2 ].sup.+ Y.sup.-wherein BINAP represents 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl, and Y represents ClO.sub.4, PF.sub.6, BF.sub.4, PCl.sub.6 or B(C.sub.6 H.sub.4) is described. This complex can be used as a catalyst for various organic syntheses and also for asymmetric syntheses such as an asymmetric isomerization reaction and an asymmetric hydrogenation reaction. Due to its high activity, the complex is very useful as a catalyst.
    Type: Grant
    Filed: September 17, 1984
    Date of Patent: August 12, 1986
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Hidenori Kumobayashi, Susumu Akutagawa
  • Rhodium-phosphine complex
    Patent number: 4604474
    Abstract: A novel rhodium-phosphine complex represented by the formula[Rh(p-Tolyl BINAP).sub.2 ].sup.+ Y.sup.-wherein p-Tolyl BINAP represents 2,2'-bis(di-p-tolylphosphino)-1,1'-binaphthyl, and Y represents ClO.sub.4, PF.sub.6, BF.sub.4 or PCl.sub.6 is described. This complex can be used as a catalyst for various organic syntheses and also for asymmetric syntheses such as an asymmetric isomerization reaction and an asymmetric hydrogenation reaction. Due to its high activity, the complex is very useful as a catalyst.
    Type: Grant
    Filed: March 21, 1985
    Date of Patent: August 5, 1986
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Hidenori Kumobayashi, Susumu Akutagawa
  • Optical resolution of the racemic modification of 2,2'-bis(diphenylphosphino)-1,1'-binaphthyldioxide
    Patent number: 4564708
    Abstract: D-2,2'-bis(diphenylphosphino)-1,1'-binaphthyldioxide and 1-2,2'-bis(diphenylphosphino)-1,1'-binaphthyldioxide are produced by reacting d1-2,2'-bis(diphenylphosphino)-1,1'-binaphthyldioxide with optically active camphor-10-sulfonic acid or optically active 3-bromo-camphor-10-sulfonic acid as a resolving agent in a lower alkyl ester of acetic acid containing a lower alkyl carboxylic acid, thereby forming diastereomeric salts, and optically resolving said diastereomeric salts.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: January 14, 1986
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Misao Yagi, Susumu Akutagawa
  • Process for producing myrcenol
    Patent number: 4520212
    Abstract: Myrcenol is produced in an effecient, high yield and economical process by deaminating 7-hydroxygeranyl dialkylamine or 7-hydroxyneryl dialkylamine with a specific palladium-phosphine-cation complex catalyst represented by the formula[<.cndot.:PdL].sup.+ X.sup.-wherein <.cndot.: represents .eta.-allyl, L represents a tertiary phosphine, and X represents a counter anion.
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: May 28, 1985
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Shigeru Mitsuhashi, Hidenori Kumobayashi, Susumu Akutagawa
  • Process for preparing hydroxycitronellal
    Patent number: 4347387
    Abstract: A process as described for preparing hydroxycitronellal by isomerizing certain 7-hydroxygeranylamine compound or 7-hydroxynerylamine compounds using a catalyst comprising a divalent palladium compound and a phosphine compound.
    Type: Grant
    Filed: December 4, 1980
    Date of Patent: August 31, 1982
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Susumu Akutagawa, Takanao Taketomi
  • Process for preparing derivatives of conjugated diene dimers
    Patent number: 4144257
    Abstract: A process for preparing derivatives of isoprene dimers, which are useful as materials for producing perfumes, pharmaceuticals and industrial chemicals, comprising catalytically reacting isoprene with an active methyl-containing compound, such as methacrylonitrile, using bis-.pi.-allyl nickel or bis-cyclooctadiene nickel as a catalyst and triphenyl phosphine, triphenyl phosphite, tributyl arsenic or tricyclohexyl phosphine as a ligand and a tertiaryamine compound as a solvent.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: March 13, 1979
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Hidenori Kumobayashi, Susumu Akutagawa, Akira Komatsu
  • 5-Acetyl-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-ene perfume composition
    Patent number: 3988366
    Abstract: 5-Acetyl-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-ene having the formula (I) ##SPC1##and a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: October 26, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • 1,2,6-Trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-one perfume composition
    Patent number: 3984355
    Abstract: 1,2,6-Trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-one having the formula (I) ##SPC1##and a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: October 5, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • Tricyclic hydrocarbon and process for producing the same
    Patent number: 3970593
    Abstract: 5,6-Epoxy-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodecane having the formula (I) ##SPC1##and a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: July 20, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • 5-Acetyl-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-ene
    Patent number: 3963782
    Abstract: 5-Acetyl-1,2,6-trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-ene having the formula (I) v,2/14And a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: June 15, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara
  • 1,2,6-Trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-one
    Patent number: 3962340
    Abstract: 1,2,6-Trimethyltricyclo[5,3,2,0.sup.2,7 ]dodeca-5-one having the formula (I) ##SPC1##and a process for producing this compound. This compound is useful as a perfume.
    Type: Grant
    Filed: December 27, 1974
    Date of Patent: June 8, 1976
    Assignee: Takasago Perfumery Co., Ltd.
    Inventors: Akira Nagakura, Susumu Akutagawa, Haruki Kurihara