Patents by Inventor Takahiro Iwahama
Takahiro Iwahama 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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Publication number: 20100081778Abstract: Disclosed is a polycyclic ester containing a cyano group and a lactone skeleton, represented by following Formula (1): wherein Ra represents, for example, a hydrogen atom or an alkyl group having one to six carbon atoms which may have a halogen atom; R1s each represent, for example, a halogen atom or an alkyl or haloalkyl group having one to six carbon atoms; “m” is the number of R1s; “n” is the number of cyano groups; and CH2?C(Ra)COO— group may have either of an endo conformation and an exo conformation. Accordingly, there is provided a novel polycyclic ester containing a cyano group and a lactone skeleton which is useful typically as a monomeric component for highly functional polymers. A polymer, for example, derived from this compound is highly soluble in an organic solvent while remaining stable typically to chemicals and exhibits improved hydrolyzability and/or improved solubility in water after hydrolysis.Type: ApplicationFiled: December 1, 2009Publication date: April 1, 2010Inventors: Keizo Inoue, Takahiro Iwahama, Masamichi Nishimura, Kiyoharu Tsutsumi
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Publication number: 20100029932Abstract: Disclosed is a process for producing an amide or lactam in a high yield in a simple manner by allowing a rearrangement reaction of an oxime compound to proceed without causing large amounts of by-products such as ammonium sulfate. Specifically, disclosed is a process for producing an amide or lactam in which a corresponding amide or lactam is produced by rearranging an oxime compound in the presence of a compound containing a structure represented by following Formula (1): —Z—X ??(1) wherein Z represents P, N, S, B, or Si atom; and X represents a leaving group, where Z is bonded to one or more atoms or groups besides X. In the process, X may be a halogen atom.Type: ApplicationFiled: December 20, 2007Publication date: February 4, 2010Inventors: Yasutaka Ishii, Takahiro Iwahama, Tatsuya Nakano
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Publication number: 20100029931Abstract: Disclosed is a method for industrially efficiently producing a lactam compound having 8 to 15 carbon atoms at low cost by allowing a rearrangement reaction of a cyclic oxime compound to proceed without causing large amounts of by-products such as ammonium sulfate. [Solving Means] Disclosed is a method for producing a lactam compound, which includes the step of rearranging a cyclic oxime compound in a nonpolar solvent B in the presence of an aromatic compound A to give the lactam compound, in which the aromatic compound A has a leaving group bonded to a carbon atom constituting its aromatic ring and contains, as an atom constituting the aromatic ring, a heteroatom, or a carbon atom bonded with an electron-withdrawing group, the cyclic oxime compound is represented by following Formula (1): wherein “m” denotes an integer of 7 to 14, and the lactam compound is represented by following Formula (2): wherein “m” is as defined above.Type: ApplicationFiled: December 20, 2007Publication date: February 4, 2010Inventors: Akihiro Shibamoto, Takahiro Iwahama, Tatsuya Nakano
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Publication number: 20100029956Abstract: Disclosed is a method for producing an ester or lactone in which a secondary alcohol represented by following Formula (1) (wherein Ra and Rb each represent an organic group, or Ra and Rb may be combined to form a ring together with the adjacent carbon atom) is oxidized by molecular oxygen in the presence of a nitrogen-containing cyclic compound containing a structure represented by following Formula (I) [wherein X represents an oxygen atom or an —OR group (wherein R represents a hydrogen atom or hydroxyl-protecting group)] as a constituent of its ring, and at least one of a fluorine-containing alcohol and a fluorinated sulfonic acid, and thereby yields a compound represented by following Formula (2):Type: ApplicationFiled: February 28, 2008Publication date: February 4, 2010Inventors: Yasutaka Ishii, Takahiro Iwahama
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Patent number: 7615656Abstract: Is disclosed a cycloaliphatic polyepoxy compound represented by following Formula (1): wherein Y represents a linkage group or a single bond; and HAs each represent hydrogen atom at the junction between cyclohexane ring and oxirane ring, and the cyclohexane rings may each further have one or more substituents in addition to the groups shown in the formula. The cycloaliphatic polyepoxy compound contains stereoisomers in such proportions as to have a ratio A/B of 1.8 or more, wherein “A” and “B” are integrated intensities of signals of protons at the junction between cyclohexane ring and oxirane ring as determined by 1H-NMR spectroscopy of the compound, in which “A” represents the integrated intensity of a signal observed at a lower magnetic field, and “B” represents the integrated intensity of a signal observed at a higher magnetic field.Type: GrantFiled: June 28, 2007Date of Patent: November 10, 2009Assignee: Daicel Chemical Industries, Ltd.Inventors: Takashi Kubo, Tatsuya Nakano, Takahiro Iwahama
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Patent number: 7608727Abstract: A carbonyl compound represented by following Formula (1): wherein R1 represents hydrogen atom or an organic group; and R2 represents hydrogen atom or an organic group having a carbon atom at a bonding site with the carbonyl group in Formula (1), wherein R1 and R2 may be combined to form a ring with adjacent two carbon atoms, or an equivalent thereof is reacted with an unsaturated compound represented by following Formula (2): wherein each of R3, R4, and R5 represents hydrogen atom, a halogen atom, hydroxyl group, or an organic group and wherein R3 and R4 may be combined to form a ring with adjacent two carbon atoms, or a precursor thereof, to yield a furan compound represented by following Formula (3): wherein R3? represents R3, R5 or hydrogen atom; and R1, R2, R3, R4, are R5 are as defined above.Type: GrantFiled: February 22, 2007Date of Patent: October 27, 2009Assignee: Daicel Chemical Industries, Ltd.Inventors: Yasutaka Ishii, Tatsuya Nakano, Takahiro Iwahama
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Patent number: 7518021Abstract: Aromatic vinyl ether compounds represented by Formula (1) or by Formula (2) wherein each R and R? is a hydrogen atom or a group represented by Formula (3) and wherein the remaining variables are as defined in the specification, provided that at least one pR in Formula (1) and at least one uR in Formula (2) is a Formula (3) group. These aromatic vinyl ether compounds are useful as, e.g., curing agents for cationic polymerization.Type: GrantFiled: October 23, 2003Date of Patent: April 14, 2009Assignee: Daicel Chemical Industries, Ltd.Inventors: Takahiro Iwahama, Tatsuya Nakano
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Publication number: 20090093628Abstract: An amide or lactam is produced by conducting a rearrangement of a corresponding oxime compound in the presence of a cyclic compound containing a structure represented by following Formula (1) as a ring constituent and a fluorinated alcohol: wherein Z represents a halogen atom or an —OR group, where R represents an organic group. Z is preferably chlorine atom. Exemplary fluorinated alcohols include fluorine-containing branched-chain aliphatic alcohols represented by following Formula (3): wherein Rf1 and Rf2 may be the same as or different from each other and each represent a perfluoroalkyl group having one to eight carbon atoms; and “n” denotes an integer of 0 to 8. According to this process, amides or lactams can be simply produced in high yields without causing large amounts of by-products.Type: ApplicationFiled: February 27, 2007Publication date: April 9, 2009Inventors: Yasutaka Ishii, Tatsuya Nakano, Takahiro Iwahama
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Publication number: 20090088592Abstract: Aromatic vinyl ether compounds represented by Formula (1) or by Formula (2) wherein each R and R? is a hydrogen atom or a group represented by Formula (3) and wherein the remaining variables are as defined in the specification, provided that at least one pR in Formula (1) and at least one uR in Formula (2) is a Formula (3) group. These aromatic vinyl ether compounds are useful as, e.g., curing agents for cationic polymerization.Type: ApplicationFiled: December 4, 2008Publication date: April 2, 2009Inventors: Takahiro IWAHAMA, Tatsuya Nakano
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Publication number: 20090043120Abstract: A process for producing a nitrite includes allowing a nitrogen oxide to react with an alcohol at a reaction temperature lower than 10° C.Type: ApplicationFiled: August 5, 2008Publication date: February 12, 2009Inventors: Akihiro Shibamoto, Takahiro Iwahama
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Publication number: 20080319160Abstract: Disclosed is a polycyclic ester containing a cyano group and a lactone skeleton, represented by following Formula (1): wherein Ra represents, for example, a hydrogen atom or an alkyl group having one to six carbon atoms which may have a halogen atom; R1s each represent, for example, a halogen atom or an alkyl or haloalkyl group having one to six carbon atoms; “m” is the number of R1s; “n” is the number of cyano groups; and CH2?C(Ra)COO— group may have either of an endo conformation and an exo conformation. Accordingly, there is provided a novel polycyclic ester containing a cyano group and a lactone skeleton which is useful typically as a monomeric component for highly functional polymers. A polymer, for example, derived from this compound is highly soluble in an organic solvent while remaining stable typically to chemicals and exhibits improved hydrolyzability and/or improved solubility in water after hydrolysis.Type: ApplicationFiled: September 26, 2006Publication date: December 25, 2008Inventors: Keizo Inoue, Takahiro Iwahama, Masamichi Nishimura, Kiyoharu Tsutsumi
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Publication number: 20080234455Abstract: Disclosed is an oxetane-containing vinyl ether compound including one or more aromatic or non-aromatic carbocycles and/or two or more vinyl ether structures, such as a compound of Formula: wherein Ring Z1 is non-aromatic carbocycle; Ra is vinyl group of Formula: wherein each of R1, R2, and R3 is hydrogen or C1-C4 alkyl; Wa is single bond or organic group having a valence of (m+1); X1 is, for example, hydrocarbon; “m” and “q” are each 1 or 2; and “p” is 0 to 5. Also disclosed is an alicyclic epoxy-containing vinyl ether compound of Formula: wherein Ring Z2 is non-aromatic carbocycle; Rb is vinyl group of Formula: wherein R4, R5 and R6 are each hydrogen or C1-C4 alkyl; Wb is single bond or organic group having a valence of (r+1); Rc and Rd are hydrogen or alkyl; and “r” and “s” are 1 or 2.Type: ApplicationFiled: March 20, 2008Publication date: September 25, 2008Inventors: Takahiro Iwahama, Tatsuya Nakano, Keizo Inoue, Hiroto Miyake, Tsukasa Yoshida, Mitsuru Ohno, Yoshinori Funaki
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Publication number: 20080221369Abstract: A substituted phenolic compound is prepared by oxidizing a substituted diarylethane compound with oxygen in the presence of a nitrogen-containing cyclic compound, and treating the oxidized product with an acid. The nitrogen-containing cyclic compound includes, as a constituent of its ring, a skeleton represented by following Formula (I): wherein X is oxygen atom or an —OR group, where R is hydrogen atom or a hydroxyl-protecting group. The substituted diarylethane compound is represented by following Formula (1): wherein each of Ring Ar1 and Ring Ar2 is independently a monocyclic or polycyclic aromatic carbocyclic ring; Y1 is an electron-donating group; Y2 is an electron-withdrawing group; “p” is an integer of 1 or more; and “q” is an integer of 0 or more. The substituted phenolic compound is represented by following Formula (2): wherein Ring Ar1, Y1, and “p” are as defined above.Type: ApplicationFiled: February 14, 2008Publication date: September 11, 2008Applicant: DAICEL CHEMICAL INSDUSTRIES, LTD.Inventors: Yasutaka Ishii, Takahiro Iwahama
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Publication number: 20080004425Abstract: Is disclosed a cycloaliphatic polyepoxy compound represented by following Formula (1): wherein Y represents a linkage group or a single bond; and HAs each represent hydrogen atom at the junction between cyclohexane ring and oxirane ring, and the cyclohexane rings may each further have one or more substituents in addition to the groups shown in the formula. The cycloaliphatic polyepoxy compound contains stereoisomers in such proportions as to have a ratio A/B of 1.8 or more, wherein “A” and “B” are integrated intensities of signals of protons at the junction between cyclohexane ring and oxirane ring as determined by 1H-NMR spectroscopy of the compound, in which “A” represents the integrated intensity of a signal observed at a lower magnetic field, and “B” represents the integrated intensity of a signal observed at a higher magnetic field.Type: ApplicationFiled: June 28, 2007Publication date: January 3, 2008Inventors: Takashi Kubo, Tatsuya Nakano, Takahiro Iwahama
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Patent number: 7304184Abstract: An allyl-containing compound represented by following Formula (3): wherein R2, R3, R4, R5 and R6 may be the same as or different from one another and each represent hydrogen atom or an organic group; R7 represents an organic group; and Y represents oxygen atom or sulfur atom, is produced by reacting an allyl ester compound represented by following Formula (1): wherein R1 represents hydrogen atom or an organic group; and R2, R3, R4, R5 and R6 are as defined above, with a compound represented by following Formula (2): R7—Y—H??(2) wherein R7 is an organic group; and Y is as defined above, in the presence of at least one transition element compound.Type: GrantFiled: February 26, 2004Date of Patent: December 4, 2007Assignee: Daicel Chemical Industries, Ltd.Inventors: Yasutaka Ishii, Takahiro Iwahama, Tatsuya Nakano
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Publication number: 20070213549Abstract: A vinyl- or allyl-containing compound represented by following Formula (3): wherein R2, R3, R4, R5, and R6 each represent hydrogen atom or a nonmetallic atom-containing group; R7 represents a nonmetallic atom-containing group; Y represents a group selected from the group consisting of —Si(R8) (R9) —, —Si(R10) (R11)—O—, the left hand of which is combined with R7, and —NR12—, wherein R8, R9, R10, R11, and R12 each represent hydrogen atom or a nonmetallic atom-containing group; and “n” represents 0 or 1, is prepared by reacting a vinyl or allyl ester compound represented by following Formula (1): wherein R1 represents hydrogen atom or a nonmetallic atom-containing group; R2, R3, R4, R5, R6, and “n” are as defined above, with a compound represented by following Formula (2): R7—Y—H ??(2) wherein R7 and Y are as defined above, in the presence of a transition element compound.Type: ApplicationFiled: March 2, 2007Publication date: September 13, 2007Inventors: Yasutaka Ishii, Tatsuya Nakano, Takahiro Iwahama
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Publication number: 20070197806Abstract: A carbonyl compound represented by following Formula (1): wherein R1 represents hydrogen atom or an organic group; and R2 represents hydrogen atom or an organic group having a carbon atom at a bonding site with the carbonyl group in Formula (1), wherein R1 and R2 may be combined to form a ring with adjacent two carbon atoms, or an equivalent thereof is reacted with an unsaturated compound represented by following Formula (2): wherein each of R3, R4, and R5 represents hydrogen atom, a halogen atom, hydroxyl group, or an organic group and wherein R3 and R4 may be combined to form a ring with adjacent two carbon atoms, or a precursor thereof, to yield a furan compound represented by following Formula (3): wherein R3? represents R3, R5 or hydrogen atom; and R1, R2, R3, R4, are R5 are as defined above.Type: ApplicationFiled: February 22, 2007Publication date: August 23, 2007Inventors: Yasutaka Ishii, Tatsuya Nakano, Takahiro Iwahama
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Publication number: 20070149828Abstract: A vinyl ether compound represented by following Formula (2): wherein R represents an organic group; and R1, R2, R3 and R4 are the same as or different from one another and each represent a hydrogen atom or an organic group, is produced by isomerizing an allyl ether compound in the presence of a base and a compound of a Group VIII element of the Periodic Table of Elements, which allyl ether compound is represented by following Formula (1): wherein R, R1, R2, R3 and R4 are as defined above.Type: ApplicationFiled: December 26, 2006Publication date: June 28, 2007Inventors: Takahiro Iwahama, Yasutaka Ishii
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Patent number: 7183423Abstract: (A) A compound capable of forming a stable radical and selected from (A1) oxygen-atom-containing compounds each having a carbon-hydrogen bond at the adjacent position to an oxygen atom, (A2) carbonyl-group-containing compounds, and (A3) compounds each having a hydrocarbon group with a methine carbon atom is allowed to react with (B) a radical scavenging compound selected from, for example, (B1) unsaturated compounds, and (B2) compounds each having a hydrocarbon group with a methine carbon atom, in the presence of molecular oxygen by catalysis of, for example, an imide compound shown by the following formula (1): wherein each of R1 and R2 is a hydrogen atom or the like, where R1 and R2 may be combined to form a double bond, or an aromatic or non-aromatic ring; X is an oxygen atom or a hydroxyl group, to yield a product of an addition or substitution reaction of the compound (A) and the compound (B) or its oxidized product.Type: GrantFiled: December 9, 1999Date of Patent: February 27, 2007Assignee: Daicel Chemical Industries, Ltd.Inventors: Yasutaka Ishii, Takahiro Iwahama, Tatsuya Nakano
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Publication number: 20060281629Abstract: A catalyst of the invention includes an imide compound having a N-substituted cyclic imide skeleton represented by following Formula (I): wherein R is a hydroxyl-protecting group. Preferred R is a hydrolyzable protecting group. R may be a group obtained from an acid by eliminating an OH group therefrom. Such acids include, for example, carboxylic acids, sulfonic acids, carbonic acid, carbamic acid, sulfuric acid, nitric acid, phosphoric acids and boric acids. The catalyst may include the imide compound and a metallic compound in combination. In the presence of the catalyst, (A) a compound capable of forming a radical is allowed to react with (B) a radical scavenging compound and thereby yields an addition or substitution reaction product of the compound (A) and the compound (B) or a derivative thereof. This catalyst can produce an organic compound with a high selectivity in a high yield as a result of, for example, an addition or substitution reaction under mild conditions.Type: ApplicationFiled: August 15, 2006Publication date: December 14, 2006Inventors: Yasutaka Ishii, Tatsuya Nakano, Takahiro Iwahama, Naruhisa Hirai