Patents by Inventor Katsuji Ujita
Katsuji Ujita 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: 11840669Abstract: The present invention relates to a method for producing a hydrocarbon, including a step (Y) of converting a reaction product of at least one sulfur compound selected from the group consisting of hydrogen sulfide and a compound containing a —SH group which are contained in a hydrocarbon with an ?,?-unsaturated aldehyde compound into a water-soluble compound in the presence of water, and a step (Z) of separating oil and water.Type: GrantFiled: November 6, 2019Date of Patent: December 12, 2023Assignee: KURARAY CO., LTD.Inventors: Naoya Minamoto, Katsuji Ujita, Takuo Tsuruta
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Patent number: 11760816Abstract: Provided is an unsaturated double bond-containing compound capable of sufficiently advancing a crosslinking reaction or a curing reaction when used for a coating material or the like and having oxygen absorption performance. The present invention also provides an oxygen absorbent containing the unsaturated double bond-containing compound and a resin composition containing the same. Provided are an unsaturated double bond-containing compound represented by general formula (I), an oxygen absorbent containing the same, and a resin composition.Type: GrantFiled: November 21, 2018Date of Patent: September 19, 2023Assignee: KURARAY CO., LTD.Inventors: Daiki Noguchi, Takashi Fukumoto, Katsuji Ujita, Keiji Kubo
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Publication number: 20220041942Abstract: The present invention relates to a method for producing a hydrocarbon, including a step (Y) of converting a reaction product of at least one sulfur compound selected from the group consisting of hydrogen sulfide and a compound containing a —SH group which are contained in a hydrocarbon with an ?,?-unsaturated aldehyde compound into a water-soluble compound in the presence of water, and a step (Z) of separating oil and water.Type: ApplicationFiled: November 6, 2019Publication date: February 10, 2022Applicant: KURARAY CO., LTD.Inventors: Naoya MINAMOTO, Katsuji UJITA, Takuo TSURUTA
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Publication number: 20210024665Abstract: Provided is an unsaturated double bond-containing compound capable of sufficiently advancing a crosslinking reaction or a curing reaction when used for a coating material or the like and having oxygen absorption performance. The present invention also provides an oxygen absorbent containing the unsaturated double bond-containing compound and a resin composition containing the same. Provided are an unsaturated double bond-containing compound represented by general formula (I), an oxygen absorbent containing the same, and a resin composition.Type: ApplicationFiled: November 21, 2018Publication date: January 28, 2021Applicant: Kuraray Co., Ltd.Inventors: Daiki NOGUCHI, Takashi FUKUMOTO, Katsuji UJITA, Keiji KUBO
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Patent number: 10618860Abstract: There is provided a composition containing one or more basic compounds selected from the group consisting of tertiary amines, nitrogen-containing heterocyclic aromatic compounds, alkali metal carbonate salts, alkaline earth metal carbonate salts and alkali metal hydrogencarbonate salts, and a homoallyl halide.Type: GrantFiled: September 13, 2016Date of Patent: April 14, 2020Assignee: KURARAY CO., LTDInventors: Junko Sato, Katsuji Ujita, Takuo Tsuruta, Takashi Sugioka
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Publication number: 20180244593Abstract: There is provided a composition containing one or more basic compounds selected from the group consisting of tertiary amines, nitrogen-containing heterocyclic aromatic compounds, alkali metal carbonate salts, alkaline earth metal carbonate salts and alkali metal hydrogencarbonate salts, and a homoallyl halide.Type: ApplicationFiled: September 13, 2016Publication date: August 30, 2018Applicant: KURARAY CO., LTD.Inventors: Junko SATO, Katsuji UJITA, Takuo TSURUTA, Takashi SUGIOKA
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Patent number: 9611344Abstract: The present invention provides a vinyl alcohol polymer having a mercapto group and having excellent reactivity.Type: GrantFiled: December 25, 2012Date of Patent: April 4, 2017Assignee: KURARAY CO., LTD.Inventors: Takuma Kaneshima, Yusuke Amano, Keisuke Morikawa, Naoki Fujiwara, Kensuke Nagashima, Katsuji Ujita
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Publication number: 20140350169Abstract: The present invention provides a vinyl alcohol polymer having a mercapto group and having excellent reactivity.Type: ApplicationFiled: December 25, 2012Publication date: November 27, 2014Applicant: KURARAY CO., LTD.Inventors: Takuma Kaneshima, Yusuke Amano, Keisuke Morikawa, Naoki Fujiwara, Kensuke Nagashima, Katsuji Ujita
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Patent number: 8816123Abstract: A decarboxylation reaction of a (3-methyl-3-butenyl)malonic acid dialkyl ester, carried out by heating in the presence of water and a base, produces an alkyl 5-methyl-5-hexenoate. The decarboxylation reaction produces the alkyl 5-methyl-5-hexenoate inexpensively and effectively. The base can optionally be a tertiary amine compound or a heterocyclic amine compound. Producing the alkyl 5-methyl-5-hexenoate can optionally further include removing an alcohol.Type: GrantFiled: December 1, 2010Date of Patent: August 26, 2014Assignee: Kuraray Co., Ltd.Inventor: Katsuji Ujita
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Patent number: 8742127Abstract: [Problem] The present invention provides an industrially advantageous production method of a 6-halogeno-3-arylpyridine derivative in which cryogenic condition is not required, production step is short, and an isomer difficult to be separated is not produced as a by-product, [Solution] A production method of a 6-halogeno-3-arylpyridine derivative represented by the general formula (III) comprising: the first step reacting a 2,5-dihalogenopyridine derivative represented by the general formula (I) with a magnesiation reagent; and the second step reacting the product obtained from the above-described first step, in the presence of a palladium compound, with a halogenoaryl derivative represented by the general formula (II).Type: GrantFiled: December 19, 2008Date of Patent: June 3, 2014Assignee: Kuraray Co., Ltd.Inventors: Nobusuke Kashiki, Toshiki Mori, Katsuji Ujita
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Publication number: 20120253062Abstract: A decarboxylation reaction of a (3-methyl-3-butenyl)malonic acid dialkyl ester, carried out by heating in the presence of water and a base, produces an alkyl 5-methyl-5-hexenoate. The decarboxylation reaction produces the alkyl 5-methyl-5-hexenoate inexpensively and effectively. The base can optionally be a tertiary amine compound or a heterocyclic amine compound. Producing the alkyl 5-methyl-5-hexenoate can optionally further include removing an alcohol.Type: ApplicationFiled: December 1, 2010Publication date: October 4, 2012Applicant: KURARAY CO., LTD.Inventor: Katsuji Ujita
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Patent number: 8173832Abstract: Provided is a method capable of solving the problems associated with production of LVSA, which is a pheromone produced by female pest mealybugs, and is useful as an agrochemical pest, at an industrial large scale, and producing LVSA in a high yield. Specifically, the present invention provides a production method of 2-isopropenyl-5-methyl-4-hexen-1-yl 3-methyl-2-butenoate, comprising reacting senecioic acid with a halogenating agent to give senecioic acid halide, reacting the obtained senecioic acid halide with 2-isopropenyl-5-methyl-4-hexen-1-ol in the presence of an organic base compound and heat treating the obtained crude 2-isopropenyl-5-methyl-4-hexen-1-yl 3-methyl-2-butenoate in the presence of a basic substance at 50-250° C.Type: GrantFiled: March 28, 2007Date of Patent: May 8, 2012Assignee: Kuraray Co., Ltd.Inventors: Katsuji Ujita, Keisuke Saeki
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Patent number: 8097746Abstract: The present invention provides a method of producing 2-isopropenyl-5-methyl-4-hexen-1-yl 3-methyl-2-butenoate industrially advantageously in a high yield. More particularly, the present invention provides a method of producing 2-isopropenyl-5-methyl-4-hexen-1-yl 3-methyl-2-butenoate represented by the following formula (IV): which comprises reacting 2-isopropenyl-5-methyl-4-hexen-1-ol with an organic sulfonyl halide in the presence of a basic substance to give a sulfonate compound represented by the following formula (III): wherein R is a hydrocarbon group, and reacting the obtained sulfonate compound with senecionic acid in the presence of a basic substance.Type: GrantFiled: March 29, 2006Date of Patent: January 17, 2012Assignee: Kuraray Co., Ltd.Inventors: Katsuji Ujita, Junko Sato, Takashi Fukumoto
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Publication number: 20100280253Abstract: [Problem] The present invention provides an industrially advantageous production method of a 6-halogeno-3-arylpyridine derivative in which cryogenic condition is not required, production step is short, and an isomer difficult to be separated is not produced as a by-product, [Solution] A production method of a 6-halogeno-3-arylpyridine derivative represented by the general formula (III) comprising: the first step reacting a 2,5-dihalogenopyridine derivative represented by the general formula (I) with a magnesiation reagent; and the second step reacting the product obtained from the above-described first step, in the presence of a palladium compound, with a halogenoaryl derivative represented by the general formula (II).Type: ApplicationFiled: December 19, 2008Publication date: November 4, 2010Applicant: Kuraray Co., Ltd.Inventors: Nobusuke Kashiki, Toshiki Mori, Katsuji Ujita
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Publication number: 20100063314Abstract: Provided is a method capable of solving the problems associated with production of LVSA, which is a pheromone produced by female pest mealybugs, and is useful as an agrochemical pest, at an industrial large scale, and producing LVSA in a high yield. Specifically, the present invention provides a production method of 2-isopropenyl-5-methyl-4-hexen-1-yl 3-methyl-2-butenoate, comprising reacting senecioic acid with a halogenating agent to give senecioic acid halide, reacting the obtained senecioic acid halide with 2-isopropenyl-5-methyl-4-hexen-1-ol in the presence of an organic base compound and heat treating the obtained crude 2-isopropenyl-5-methyl-4-hexen-1-yl 3-methyl-2-butenoate in the presence of a basic substance at 50-250° C.Type: ApplicationFiled: March 28, 2007Publication date: March 11, 2010Applicant: KURARAY CO., LTD.Inventors: Katsuji Ujita, Keisuke Saeki
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Publication number: 20090259038Abstract: The present invention provides a method of producing (5?,7?)-3-spiro-2?-(1?,3?-dioxolan)-24-oxocholest-22-en-7-yl benzoate represented by the formula (I) including dissolving a crude product containing (5?,7?)-3-spiro-2?-(1?,3?-dioxolan)-24-oxocholest-22-en-7-yl benzoate, which is obtained by a reaction step, in methanol within the range of 1.5-3 in a mass ratio relative to the contained (5?,7?)-3-spiro-2?-(1?,3?-dioxolan)-24-oxocholest-22-en-7-yl benzoate to give a solution, adding the solution to water within the range of 5-30 in a mass ratio relative to the contained (5?,7?)-3-spiro-2?-(1?,3?-dioxolan)-24-oxocholest-22-en-7-yl benzoate to solidify (5?,7?)-3-spiro-2?-(1?,3?-dioxolan)-24-oxocholest-22-en-7-yl benzoate to give a suspension, separating the solid from the suspension, and drying the obtained solid. The compound obtained by the present invention is useful as a production intermediate for squalamine having potent antibacterial activity and antitumor activity.Type: ApplicationFiled: December 7, 2005Publication date: October 15, 2009Applicant: KURARAY CO., LTD.Inventors: Kenichi Koyakumaru, Katsuji Ujita
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Publication number: 20090023941Abstract: The present invention provides a method of producing 2-isopropenyl-5-methyl-4-hexen-1-yl 3-methyl-2-butenoate industrially advantageously in a high yield. More particularly, the present invention provides a method of producing 2-isopropenyl-5-methyl-4-hexen-1-yl 3-methyl-2-butenoate represented by the following formula (IV): which comprises reacting 2-isopropenyl-5-methyl-4-hexen-1-ol with an organic sulfonyl halide in the presence of a basic substance to give a sulfonate compound represented by the following formula (III): wherein R is a hydrocarbon group, and reacting the obtained sulfonate compound with senecionic acid in the presence of a basic substance.Type: ApplicationFiled: March 29, 2006Publication date: January 22, 2009Applicant: KURARAY CO., LTD.Inventors: Katsuji Ujita, Junko Sato, Takashi Fukumoto
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Patent number: 7358400Abstract: A method of industrially advantageously producing a cyclopropane monoacetal derivative represented by the formula (III) conveniently and also in a fewer steps by reacting a halogenated unsaturated carbonyl compound represented by the formula (II) with an alcoholate. wherein each symbol is as defined in the specification.Type: GrantFiled: March 25, 2005Date of Patent: April 15, 2008Assignees: Kuraray Co., Ltd., Daiichi Pharmaceutical Co., Ltd.Inventors: Kenichi Koyakumaru, Shingo Ueyama, Katsuji Ujita, Tatsuhiko Hayashibara, Naoshi Nakagawa, Toshifumi Akiba, Tatsuru Saito
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Publication number: 20070191643Abstract: A method of industrially advantageously producing a cyclopropane monoacetal derivative represented by the formula (III) conveniently and also in a fewer steps by reacting a halogenated unsaturated carbonyl compound represented by the formula (II) with an alcoholate. wherein each symbol is as defined in the specification.Type: ApplicationFiled: March 25, 2005Publication date: August 16, 2007Applicants: Kuraray Co,, Ltd., Daiichi Pharmaceutical Co., Ltd.Inventors: Kenichi Koyakumaru, Shingo Ueyama, Katsuji Ujita, Tatsuhiko Hayashibara, Naoshi Nakagawa, Toshifumi Akiba, Tatsuru Saito
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Patent number: 7164047Abstract: A process for preparation of cyclopropylethanol, which comprises subjecting a 3-cyclopropyl-2,3-epoxypropionic acid ester to solvolysis, treating the product of the solvolysis with an acid to obtain cyclopropylacetaldehyde, and reducing the obtained cyclopropylacetaldehyde; and a process for preparation of cyclopropylacetonitrile, which comprises subjecting a 3-cyclopropyl-2,3-epoxypropionic acid ester to solvolysis in the presence of a base, treating the product of the solvolysis with an acid to obtain cyclopropylacetaldehyde, reacting the obtained cyclopropylacetaldehyde with hydroxylamine or salts thereof to obtain cyclopropaneacetaldehyde oxime, and reacting the obtained cyclopropaneacetaldehyde oxime with acetic anhydride. According to the present invention, cyclopropylethanol and cyclopropylacetonitrile can be prepared at low costs and industrially advantageously.Type: GrantFiled: October 31, 2002Date of Patent: January 16, 2007Assignee: Kuraray Co., Ltd.Inventor: Katsuji Ujita