Patents by Inventor Hiroto Tatamidani
Hiroto Tatamidani 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: 20220220072Abstract: The present invention provides a method in which when using (+)-dibenzoyl-D-tartaric acid to optically divide (±)-1-methyl-4-(2,4,6-trimethoxyphenyl)-3-piperidinone, an ether-based solvent is added and an extremely high yield of (R)-1-methyl-4-(2,4,6-trimethoxyphenyl)-3-piperidinone (+)-dibenzoyl-D-tartrate is thereby obtained, a slurry thereof is treated with a base, a “three-dimensionally bulky reducing agent” is subsequently used, and cis-(?)-flocinopiperidol is thereby produced with surprisingly high selectivity.Type: ApplicationFiled: April 17, 2020Publication date: July 14, 2022Inventors: Hiroto Tatamidani, Shinjiro Tsuyumine, Yoko Takahashi
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Publication number: 20210070724Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.Type: ApplicationFiled: November 23, 2020Publication date: March 11, 2021Applicant: Sumitomo Dainippon Pharma Co., Ltd.Inventors: Toshikazu YAGI, Satoshi SUZUKI, Hiroto TATAMIDANI, Kazuki HASHIMOTO
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Patent number: 10875835Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.Type: GrantFiled: February 24, 2020Date of Patent: December 29, 2020Assignee: SUMITOMO DAINIPPON PHARMA CO., LTD.Inventors: Toshikazu Yagi, Satoshi Suzuki, Hiroto Tatamidani, Kazuki Hashimoto
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Publication number: 20200190049Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.Type: ApplicationFiled: February 24, 2020Publication date: June 18, 2020Applicant: Sumitomo Dainippon Pharma Co., Ltd.Inventors: Toshikazu YAGI, Satoshi SUZUKI, Hiroto TATAMIDANI, Kazuki HASHIMOTO
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Patent number: 10611746Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.Type: GrantFiled: May 10, 2019Date of Patent: April 7, 2020Assignee: Sumitomo Dainippon Pharma Co., Ltd.Inventors: Toshikazu Yagi, Satoshi Suzuki, Hiroto Tatamidani, Kazuki Hashimoto
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Publication number: 20190263769Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.Type: ApplicationFiled: May 10, 2019Publication date: August 29, 2019Applicant: Sumitomo Dainippon Pharma Co., Ltd.Inventors: Toshikazu YAGI, Satoshi SUZUKI, Hiroto TATAMIDANI, Kazuki HASHIMOTO
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Patent number: 10329267Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.Type: GrantFiled: July 15, 2016Date of Patent: June 25, 2019Assignee: SUMITOMO DAINIPPON PHARMA CO., LTD.Inventors: Toshikazu Yagi, Satoshi Suzuki, Hiroto Tatamidani, Kazuki Hashimoto
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Publication number: 20180201597Abstract: The invention addresses the problem of providing a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione that is suited to industrial production. The invention provides a method for producing 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by reacting 3-bromo-3-buten-2-one and 2-hydroxy-1,4-naphthoquinone in the presence of a solvent, then obtaining crystals of 2-acetyl-4H,9H-naphtho[2,3-b]furan-4,9-dione by adding an alcohol-based solvent and/or water to the reaction system, and treating the crystals by using a specific adsorbent in the presence of a solvent.Type: ApplicationFiled: July 15, 2016Publication date: July 19, 2018Applicant: Sumitomo Dainippon Pharma Co., Ltd.Inventors: Toshikazu YAGI, Satoshi SUZUKI, Hiroto TATAMIDANI, Kazuki HASHIMOTO
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Patent number: 8541585Abstract: The present invention provides compounds which show high effectiveness against positive symptoms, negative symptoms and cognitive dysfunction in schizophrenia and reduce conventional side-effect risks as well as have remarkable effects for central neurological diseases associated with cognitive dysfunction other than schizophrenia. N-Acyl cyclic amine derivatives of formula (1): wherein Ar1 and Ar2 are aryl or heteroaryl; V is nitrogen, or CR3; W1 is a single bond, —C(O)—, etc.; W2 is C1-alkylene; W3 is a single bond, methylene, —NH—, —CR4?CR5—, etc.; Ring Q is a group of formula (a) in which n is 0 or 1; m is 0 to 2; k is 1 to 3; Z is a single bond, methylene, oxygen, etc.; R1a, R1b and R1c are each, same or different, hydrogen, hydroxyl, halogen, cyano, C1-6 alkyl, etc.; or pharmaceutically acceptable salts thereof are provided.Type: GrantFiled: March 11, 2011Date of Patent: September 24, 2013Assignee: Dainippon Sumitomo Pharma Co., Ltd.Inventors: Megumi Maruyama, Naoya Kinomura, Satoshi Nojima, Masahiro Takamura, Keisuke Kakiguchi, Hiroto Tatamidani
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Publication number: 20120214790Abstract: The present invention provides compounds which show high effectiveness against positive symptoms, negative symptoms and cognitive dysfunction in schizophrenia and reduce conventional side-effect risks as well as have remarkable effects for central neurological diseases associated with cognitive dysfunction other than schizophrenia. N-Acyl cyclic amine derivatives of formula (1): wherein Ar1 and Ar2 are aryl or heteroaryl; V is nitrogen, or CR3; W1 is a single bond, —C(O)—, etc.; W2 is C1-alkylene; W3 is a single bond, methylene, —NH—, —CR4?CR5—, etc.; Ring Q is a group of formula (a) in which n is 0 or 1; m is 0 to 2; k is 1 to 3; Z is a single bond, methylene, oxygen, etc.; R1a, R1b and R1c are each, same or different, hydrogen, hydroxyl, halogen, cyano, C1-6 alkyl, etc.; or pharmaceutically acceptable salts thereof are provided.Type: ApplicationFiled: March 11, 2011Publication date: August 23, 2012Inventors: Megumi Maruyama, Naoya Kinomura, Satoshi Nojima, Masahiro Takamura, Keisuke Kakiguchi, Hiroto Tatamidani
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Publication number: 20110071289Abstract: Disclosed is a compound represented by the formula (1) below or a pharmaceutically acceptable salt thereof, which is useful as an agent for prevention and/or treatment of diabetes and the like. (In the formula, RA and RB independently represent an optionally substituted alkyl group or the like; RC represents an optionally substituted alkyl group or the like; RD represents a hydrogen atom or the like; RE represents a hydrogen atom or the like; and RF represents a group selected from those represented by the formulae (G1) below: wherein one hydrogen atom serves as a bonding hand, or the like.Type: ApplicationFiled: August 6, 2008Publication date: March 24, 2011Applicant: DAINIPPON SUMITOMO PHARMA CO., LTD.Inventors: Yoshihiro Horiuchi, Noriko Nunami, Hiroto Tatamidani, Eiko Ohata