Patents by Inventor Seiichi Takano
Seiichi Takano 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).
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Patent number: 5567851Abstract: The present invention relates to optically active cyclohexene diol derivatives and optically active cyclohexenone derivatives, and a process for production of these compounds in which a special cyclohexene diol of a starting material is reacted by selectively positioning transesterification in the presence of lipase to obtain an optically active cyclohexene diol derivative and then an optically active cyclohexenone derivative represented by the following formula: ##STR1## According to the present invention, optically active cyclohexene diol derivatives and optically-active cyclohexenone derivatives, which are intermediates for synthesizing physiologically active materials, can be obtained efficiently.Type: GrantFiled: May 24, 1995Date of Patent: October 22, 1996Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5504255Abstract: The present invention provides special epoxy derivative (1), cyclohexanone derivative (2), cyclohexenone derivative (3) and 3-substituted cyclohexenone derivative (4) which are useful as intermediates for synthesizing physiologically active materials, and a method for stereoselectively introducing substituted groups. Further, the present invention provides a method for synthesizing optically active compounds, such as optically active carvone via these intermediates.Type: GrantFiled: May 15, 1995Date of Patent: April 2, 1996Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5504219Abstract: An optically active (S)- or (R)-pentane compound of the general formula (11): ##STR1## wherein R.sub.11, R.sub.12 and R.sub.13 independently represent a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms, R.sub.14 represents a hydroxy, protected hydroxy or oxo group, if R.sub.14 is an oxo group, the ring denoting benzene in the above formula (11) is benzoquinone, R.sub.15 represents a hydrogen atom, hydroxy or acyloxy group, R.sub.16 represents a hydroxy or acyloxy group, and the chiral central carbon marked with a symbol * in said formula (11) alternatively has one of an R-configuration and an S-configuration, is disclosed. Further, intermediate products of the compound of the formula (11) are also disclosed. Still further, a process for manufacturing the above compounds is disclosed. The compound of the formula (11) is easily synthesized from an easily available optically active starting material.Type: GrantFiled: May 17, 1994Date of Patent: April 2, 1996Assignee: Asahi Denka Kogyo K.K.Inventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5446175Abstract: The present invention provides special epoxy derivative (1), cyclohexanone derivative (2), cyclohexenone derivative (3) and 3-substituted cyclohexenone derivative (4) which are useful as intermediates for synthesizing physiologically active materials, and a method for stereoselectively introducing substituted groups. Further, the present invention provides a method for synthesizing optically active compounds, such as optically active carvone via these intermediates.Type: GrantFiled: July 19, 1994Date of Patent: August 29, 1995Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5442098Abstract: The present invention relates to optically active cyclohexene diol derivatives and optically active cyclohexenone derivatives, and a process for production of these compounds in which a special cyclohexene diol of a starting material is reacted by selectively positioning transesterification in the presence of lipase to obtain an optically active cyclohexene diol derivative and then an optically active cyclohexenone derivative represented by the following formula: ##STR1## According to the present invention, optically active cyclohexene diol derivatives and optically active cyclohexenone derivatives, which are intermediates for synthesizing physiologically active materials, can be obtained efficiently.Type: GrantFiled: May 31, 1994Date of Patent: August 15, 1995Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5435842Abstract: Vibration damping thick-film coating composition comprising a coating composition comprising 100 parts by weight of a binder, from 20 to 200 parts by weight of a hydraulic inorganic filler, from 10 to 150 parts by weight of a filler other than the hydraulic inorganic filler, and from 10 to 7 parts by weight of (a) a cored filler or (b) a cored filler and a synthetic resin powder, and a method of forming the same.Type: GrantFiled: August 11, 1992Date of Patent: July 25, 1995Assignees: Cosmo Research Institute, Cosmo Oil Co., Ltd.Inventors: Heihachiro Mukaida, Takashi Hemmi, Seiichi Takano, Yoshiyuki Hattori
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Patent number: 5424462Abstract: The present invention provides a method for producing (+)-estrone derivatives, characterized in that it comprises starting from a certain cyclopentadiene derivative, reacting the derivative with a certain diene compound by an asymmetric Diels-Alder reaction, and via intermediates obtaining a (+)-estron derivative represented by the following formula: ##STR1## wherein R is alkyl of 1-20 carbon atoms. According to the present invention, (+)-estron derivatives can be obtained by limited steps from the starting materials of dicyclopentadiene derivatives.Type: GrantFiled: July 18, 1994Date of Patent: June 13, 1995Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5401436Abstract: An optically active compound of the formula (I): ##STR1## R is a halogen atom, a cyano group, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms, --R' or --O--R' group; R' is a ##STR2## group, wherein Y is a halogen atom, a hydroxyl group, an alkoxy group having 1 to 18 carbon atoms or an acyloxy group having 1 to 18 carbon atoms; X is a direct bond or a ##STR3## group; m, n and p each are each 0 or 1, provided that at least one of m, n and p is 1; and , represents an asymetric carbon atom.Type: GrantFiled: December 11, 1992Date of Patent: March 28, 1995Assignee: Asahi Denka Kogko Kabushiki KaishaInventors: Seiichi Takano, Kunio Ogasawara, Toshihiro Shibata, Masaki Kimura, Norio Kurosawa
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Patent number: 5374768Abstract: The present invention provides a process for producing an optically active cyclohexenone derivative characterized in that it comprises using a specialized cyclohexene derivative as a starting material, reacting the derivative with lipase by regioselective transesterification to obtain optically active cyclohexenone derivatives, represented by the following formulae.Type: GrantFiled: September 27, 1993Date of Patent: December 20, 1994Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5352845Abstract: A process for manufacturing an optically active saturated compound of the general formula (25): ##STR1## wherein R.sub.20 represents a group for protecting a hydroxy group, R.sub.21, R.sub.22, and R.sub.23 independently represent a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms, is disclosed.Type: GrantFiled: March 25, 1993Date of Patent: October 4, 1994Assignee: Asahi Denka Kogyo K.K.Inventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5310956Abstract: The present invention is optically active epoxides and its production characterized in that the process comprises reacting alkenyl ethylene glycols with 0.5 to 2.0 equivalents of a titanium-tetraalkoxyde, a peroxide and an L-(+)- or D-(-)-dialkyl tartrate at a temperature of -78.degree. to 50.degree. C. to asymmetrically oxidize the alkenyl ethylene glycols. The production of the present invention is an excellent method for producing chiral epoxides in which steric configuration of three asymmetric points can be perfectly controlled, the reaction is performed by mild conditions and the chemical yield and the optical yield are extremely high. The optically active epoxides which can be efficiently produced by the production of the present invention are useful as stating materials of several kinds of compounds.Type: GrantFiled: May 19, 1993Date of Patent: May 10, 1994Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5300664Abstract: The present invention provides a method for producing (+)-estrone derivatives, characterized in that it comprises starting from a certain cyclopentadiene derivative, reacting the derivative with a certain diene compound by an asymmetric Diels-Alder reaction, and via intermediates obtaining a (+)-estron derivative represented by the following formula: ##STR1## wherein R is alkyl of 1-20 carbon atoms. According to the present invention, (+)-estron derivatives can be obtained by limited steps from the starting materials of dicyclopentadiene derivatives.Type: GrantFiled: November 25, 1992Date of Patent: April 5, 1994Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5262552Abstract: An optically active (S)- or (R)-pentane compound of the general formula (11): ##STR1## wherein R.sub.11, R.sub.12 and R.sub.13 independently represent a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms, R.sub.14 represents a hydroxy, protected hydroxy or oxo group, if R.sub.14 is an oxo group, the ring denoting benzene in the above formula (11) is benzoquinone, R.sub.15 represents a hydrogen atom, hydroxy or acyloxy group, R.sub.16 represents a hydroxy or acyloxy group, and the chiral central carbon marked with a symbol * in said formula (11) alternatively has one of an R-configuration and an S-configuration, is disclosed. Further, intermediate products of the compound of the formula (11) are also disclosed. Still further, a process for manufacturing the above compounds is disclosed. The compound of the formula (11) is easily synthesized from an easily available optically active starting material.Type: GrantFiled: February 20, 1991Date of Patent: November 16, 1993Assignee: Asahi Denka Kogyo K.K.Inventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5254704Abstract: The present invention is optically active epoxides and its production characterized in that the process comprises reacting alkenyl ethylene glycols with 0.5 to 2.0 equivalents of a titanium-tetraalkoxyde, a peroxide and an L-(+)- or D-(-)-dialkyl tartrate at a temperature of -78.degree. to 50.degree. C. to asymmetrically oxidize the alkenyl ethylene glycols. The production of the present invention is an excellent method for producing chiral epoxides in which steric configuration of three asymmetric points can be perfectly controlled, the reaction is performed by mild conditions and the chemical yield and the optical yield are extremely high. The optically active epoxides which can be efficiently produced by the production of the present invention are useful as stating materials of several kinds of compounds.Type: GrantFiled: May 20, 1992Date of Patent: October 19, 1993Assignee: Chisso CorporationInventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5243096Abstract: An optically active pentane compound of the general formula (I): ##STR1## wherein R.sub.1 represents a lower alkyl group having 1 to 4 carbon atoms, R.sub.2 represents a lower alkoxycarbonyl group having an alkoxy moiety of 1 to 4 carbon atoms, or a straight-chain or branched alkyl group having 1 to 7 carbon atoms which is unsubstituted or substituted with a hydroxy or protected hydroxy group, A represents a halogen atom, hydroxy, protected hydroxy, or ethynyl group, or a group of the formula ##STR2## B represents a hydrogen atom, hydroxy, protected hydroxy or acyloxy group, D represents a hydrogen atom, or A and B together can form an acetal or epoxy group, A and D together can form an ethylidene group, and B and D together can form a carbon-carbon direct bond, and the chiral central carbon atoms marked with symbols *, # and .thrfore.Type: GrantFiled: April 30, 1992Date of Patent: September 7, 1993Assignee: Asahi Denka Kogyo K.K.Inventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5233056Abstract: An optically active (S)- or (R)-chroman-2-ethanol compound of a general formula (I) ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 independently represent a hydrogen atom or a lower alkyl group having 1 to 4 carbon atoms, and a chiral central carbon atom marked with a symbol * in the formula (I) alternatively has one of an R-configuration and an S-configuration, is disclosed. Further, intermediate products of the compound of the formula (I) are also disclosed. Still further, a process for manufacturing the above compounds is disclosed. The compound of the formula (I) is easily synthesized from an easily available optically active starting material.Type: GrantFiled: November 8, 1991Date of Patent: August 3, 1993Assignee: Asahi Denka Kogyo K.K.Inventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5219743Abstract: The primary hydroxy group of Corey lactone diols is optically selectively acylated to obtain the desired optically active ester and/or diol. The mixture of Corey lactone diols of formulae (Ia) and (Ib): ##STR1## is reacted with an acylating agent optically selectively in the presence of an enzyme and/or a microorganism thereby to acylate, isolate and purify the primary alcohol.Type: GrantFiled: February 18, 1992Date of Patent: June 15, 1993Assignee: Nissan Chemical Industries, Ltd.Inventors: Seiichi Takano, Tsutomu Sugahara
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Patent number: 5200111Abstract: An optically active compound of the formula (I): ##STR1## R is a halogen atom, a cyano group, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms --R' or --O--R' group; R' is a ##STR2## group, wherein Y is a halogen atom, a hydroxyl group, an alkoxy group having 1 to 18 carbon atoms or an acyloxy group having 1 to 18 carbon atoms; X is a direct bond or a ##STR3## group; m, n and p each are each 0 or 1, provided that at least one of m, n and p is 1; and * represents an asymetric carbon atom. The optically active compound can impart a desired helical pitch to a liquid crystal composition.Type: GrantFiled: March 20, 1989Date of Patent: April 6, 1993Assignee: Asahi Denka Kogyo Kabushiki KaishaInventors: Seiichi Takano, Kunio Ogasawara, Toshihiro Shibata, Masaki Kimura, Norio Kurosawa
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Patent number: 5136061Abstract: An optically active pentane compound of the general formula (I): ##STR1## wherein R.sub.1 represents a lower alkyl group having 1 to 4 carbon atoms, R.sub.2 represents a lower alkoxycarbonyl group having an alkoxy moiety of 1 to 4 carbon atoms, or a straight-chain or branched alkyl group having 1 to 7 carbon atoms which is unsubstituted or substituted with a hydroxy or protected hydroxy group, A represents a halogen atom, hydroxy, protected hydroxy, or ethynyl group, or a group of the formula ##STR2## B represents a hydrogen atom, hydroxy, protected hydroxy or acyloxy group, D represents a hydrogen atom, or A and B together can form an acetal or epoxy group, A and D together can form an ethylidene group, and B and D together can form a carbon-carbon direct bond, and a chiral central carbon atoms marked with symbols *, # and .thrfore. in said formula (I) alternatively have one of an R-configuration and an S-configuration.Type: GrantFiled: June 13, 1991Date of Patent: August 4, 1992Assignee: Asahi Denka Kogyo K.K.Inventors: Seiichi Takano, Kunio Ogasawara
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Patent number: 5089176Abstract: An optically active monoester of the formula of ##STR1## where R is C.sub.1 -C.sub.15 alkyl is disclosed. The monoester is produced by transesterification of cis-endo-bicyclo [2,2,2] oct-5-ene-2,3-dimethanol with a fatty acid alkyl or vinyl ester, or triglyceride by using an esterase.Type: GrantFiled: August 17, 1990Date of Patent: February 18, 1992Assignee: Chisso CorporationInventors: Tetsuya Ogawa, Naoyuki Yoshida, Seiichi Takano, Kunio Ogasawara