Patents by Inventor Yoshikazu Asahina
Yoshikazu Asahina 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: 9452977Abstract: A compound having a hypoglycemic effect is provided. The compound and a pharmaceutically acceptable salt thereof are useful for the treatment or prevention of diabetes, obesity, and the like. The compound is represented by the general formula (1): (wherein R1 and R2 are each independently a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a hydroxyamino group, a nitro group, a cyano group, a sulfamoyl group, a C1 to C6 alkyl group, a C1 to C6 alkoxy group, a C1 to C6 alkylsulfanyl group, a C1 to C6 alkylsulfinyl group, a C1 to C6 alkylsulfonyl group, or a C1 to C6 alkoxy-C1 to C6 alkylsulfonyl group, and A is a substituted or unsubstituted heteroaryl group).Type: GrantFiled: December 19, 2014Date of Patent: September 27, 2016Assignees: KYORIN PHARMACEUTICAL CO., LTD., TEIJIN PHARMA LIMITEDInventors: Yasumichi Fukuda, Yoshikazu Asahina, Masanori Takadoi, Masanori Yamamoto
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Publication number: 20150105581Abstract: A compound having a hypoglycemic effect is provided. The compound and a pharmaceutically acceptable salt thereof are useful for the treatment or prevention of diabetes, obesity, and the like. The compound is represented by the general formula (1): (wherein R1 and R2 are each independently a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a hydroxyamino group, a nitro group, a cyano group, a sulfamoyl group, a C1 to C6 alkyl group, a C1 to C6 alkoxy group, a C1 to C6 alkylsulfanyl group, a C1 to C6 alkylsulfinyl group, a C1 to C6 alkylsulfonyl group, or a C1 to C6 alkoxy-C1 to C6 alkylsulfonyl group, and A is a substituted or unsubstituted heteroaryl group).Type: ApplicationFiled: December 19, 2014Publication date: April 16, 2015Inventors: Yasumichi FUKUDA, Yoshikazu ASAHINA, Masanori TAKADOI, Masanori YAMAMOTO
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Patent number: 8946440Abstract: A compound having a hypoglycemic effect is provided. The compound and a pharmaceutically acceptable salt thereof are useful for the treatment or prevention of diabetes, obesity, and the like. The compound is represented by the general formula (1): (wherein R1 and R2 are each independently a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a hydroxyamino group, a nitro group, a cyano group, a sulfamoyl group, a C1 to C6 alkyl group, a C1 to C6 alkoxy group, a C1 to C6 alkylsulfanyl group, a C1 to C6 alkylsulfinyl group, a C1 to C6 alkylsulfonyl group, or a C1 to C6 alkoxy-C1 to C6 alkylsulfonyl group, and A is a substituted or unsubstituted heteroaryl group).Type: GrantFiled: April 27, 2009Date of Patent: February 3, 2015Assignees: Kyorin Pharmaceutical Co., Ltd., Teijin Pharma LimitedInventors: Yasumichi Fukuda, Yoshikazu Asahina, Masanori Takadoi, Masanori Yamamoto
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Patent number: 8222407Abstract: To provide a novel mutilin derivative having a substitution at the 14-position, which is a novel mutilin analogue exhibiting a potent and broad antimicrobial action against Gram-positive bacteria and Gram-negative bacteria including various drug-resistant bacteria, and which is expected to be useful as an agent for treating infectious diseases. A mutilin derivative represented by the following general formula (1): or a pharmaceutically acceptable addition salt thereof.Type: GrantFiled: May 23, 2008Date of Patent: July 17, 2012Assignee: Kyorin Pharmaceutical Co., Ltd.Inventors: Yasumichi Fukuda, Masanori Takadoi, Yoshikazu Asahina, Taro Sato, Haruaki Kurasaki, Hiroyuki Ebisu, Masaya Takei, Hideyuki Fukuda
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Patent number: 8173649Abstract: A compound represented by the following formula (1): (wherein the carbon atom denoted by * is in the R-configuration; R1 and R2 are each independently a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a hydroxyamino group, a nitro group, a cyano group, a sulfamoyl group, a C1-C6 alkyl group, a C1-C6 alkoxy group, a C1-C6 alkylsulfanyl group, a C1-C6 alkylsulfinyl group or a C1-C6 alkylsulfonyl group; and A is a substituted or unsubstituted heteroaryl group), or a pharmaceutically acceptable salt thereof.Type: GrantFiled: December 21, 2007Date of Patent: May 8, 2012Assignees: Kyorin Pharmaceutical Co., Ltd., Teijin Pharma LimitedInventors: Yasumichi Fukuda, Yoshikazu Asahina, Ayako Nakamura, Kenji Fujita, Tomohiro Ide, Fumiyoshi Kobayashi, Shinji Kobayashi, Kanji Komatsu, Masanori Yamamoto
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Patent number: 8106072Abstract: Object To provide novel quinolinecarboxylic acid compounds serving as safe, strong antibacterial agents that are effective against drug-resistant bacteria that are less susceptible to conventional antibacterial agents. Solving Means There are provided 7-(4-substituted-3-cyclopropylaminomethylpyrrolidinyl)quinolonecarboxylic acid derivatives (such as 1-cyclopropyl-7-[(3S,4S)-3-cyclopropylaminomethyl-4-fluoro-1-pyrrolidinyl]-6-fluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid) that exhibit strong antibacterial activity against gram-positive bacteria, such as MRSA, PRSP and VRE, while being safe.Type: GrantFiled: February 26, 2009Date of Patent: January 31, 2012Assignee: Kyorin Pharmaceutical Co., Ltd.Inventors: Yoshikazu Asahina, Masaya Takei
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Patent number: 8053465Abstract: Summary Novel bicycloester derivatives and pharmaceutically acceptable salts thereof have high DPP-IV inhibitory activity. Solving Means The novel bicycloester derivatives are represented by the general formula (1): Pharmaceutically acceptable salts thereof are also included (Example: (2S,4S)-1-[[(N-(4-ethoxycarbonylbicyclo[2.2.2]oct-1-yl)amino]acetyl]-4-fluoropyrrolidine-2-carbonitrile)).Type: GrantFiled: December 8, 2009Date of Patent: November 8, 2011Assignee: Kyorin Pharmaceutical Co., Ltd.Inventors: Yasumichi Fukuda, Yoshikazu Asahina, Kohei Ohata, Kazuya Yokota, Koji Murakami, Toshiyuki Matsui
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Patent number: 8034819Abstract: A compound, or a pharmaceutically acceptable salt thereof, represented by the formula (1), (wherein, the carbon atom marked with an * is in the R-configuration, R1 represents a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a hydroxyamino group, a nitro group, a cyano group, a sulfamoyl group, a C1-C6 alkyl group, or a C1-C6 alkoxy group, R2 represents a C3-C6 cycloalkylsulfanyl group, a C3-C6 cycloalkylsulfinyl group, or a C3-C6 cycloalkylsulfonyl group, and A represents a substituted or unsubstituted heteroaryl group).Type: GrantFiled: March 6, 2008Date of Patent: October 11, 2011Assignees: Kyorin Pharmaceutical Co., Ltd., Teijin Pharma LimitedInventors: Yasumichi Fukuda, Yoshikazu Asahina, Masanori Takadoi, Kohei Ohata, Tomohiro Ide, Fumiyoshi Kobayashi, Shinji Kobayashi, Kanji Komatsu, Masanori Yamamoto
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Publication number: 20110160211Abstract: A compound having a hypoglycemic effect is provided. The compound and a pharmaceutically acceptable salt thereof are useful for the treatment or prevention of diabetes, obesity, and the like. The compound is represented by the general formula (1): (wherein R1 and R2 are each independently a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a hydroxyamino group, a nitro group, a cyano group, a sulfamoyl group, a C1 to C6 alkyl group, a C1 to C6 alkoxy group, a C1 to C6 alkylsulfanyl group, a C1 to C6 alkylsulfinyl group, a C1 to C6 alkylsulfonyl group, or a C1 to C6 alkoxy-C1 to C6 alkylsulfonyl group, and A is a substituted or unsubstituted heteroaryl group).Type: ApplicationFiled: April 27, 2009Publication date: June 30, 2011Inventors: Yasumichi Fukuda, Yoshikazu Asahina, Masanori Takadoi, Masanori Yamamoto
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Patent number: 7915427Abstract: Novel intermediates for the production of aminoacetyl pyrrolidine carbonitrile derivatives ensure the safe and efficient production of the compounds. Specifically, the present invention provides a sulfonyloxyacetyl pyrrolidine derivative, represented by the following formula: (Chemical Formula 1) (wherein R1 is a substituted or unsubstituted C1-C6 alkyl group, a substituted or unsubstituted C3-C6 cycloalkyl group, a substituted or unsubstituted arylmethyl group, a substituted or unsubstituted aromatic hydrocarbon, a substituted or unsubstituted aromatic heterocyclic ring or a substituted or unsubstituted aliphatic heterocyclic ring; R2 is CONH2 or CN; and X is CH2, CHF or CF2.Type: GrantFiled: February 2, 2007Date of Patent: March 29, 2011Assignee: Kyorin Pharmaceuticals Co., Ltd.Inventors: Yoshikazu Asahina, Yasumichi Fukuda, Futoshi Shiga
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Publication number: 20100197909Abstract: To provide a novel mutilin derivative having a substitution at the 14-position, which is a novel mutilin analogue exhibiting a potent and broad antimicrobial action against Gram-positive bacteria and Gram-negative bacteria including various drug-resistant bacteria, and which is expected to be useful as an agent for treating infectious diseases. A mutilin derivative represented by the following general formula (1): or a pharmaceutically acceptable addition salt thereof.Type: ApplicationFiled: May 23, 2008Publication date: August 5, 2010Inventors: Yasumichi Fukuda, Masanori Takadoi, Yoshikazu Asahina, Taro Sato, Haruaki Kurasaki, Hiroyuki Ebisu, Masaya Takei, Hideyuki Fukuda
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Patent number: 7754757Abstract: Novel bicycloester derivatives and pharmaceutically acceptable salts thereof have high DPP-IV inhibitory activity. The novel bicycloester derivatives are represented by the general formula (1): Pharmaceutically acceptable salts thereof are also included (Example: (2S,4S)-1-[[N-(4-ethoxycarbonylbicyclo[2.2.2]oct-1-yl)amino]acetyl]-4-fluoropyrrolidine-2-carbonitrile)).Type: GrantFiled: February 1, 2005Date of Patent: July 13, 2010Assignee: Kyorin Pharmaceutical Co., Ltd.Inventors: Yasumichi Fukuda, Yoshikazu Asahina, Kohei Ohata, Kazuya Yokota, Koji Murakami, Toshiyuki Matsui
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Publication number: 20100099671Abstract: A compound, or a pharmaceutically acceptable salt thereof, represented by the formula (1), (wherein, the carbon atom marked with an * is in the R-configuration, R1 represents a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a hydroxyamino group, a nitro group, a cyano group, a sulfamoyl group, a C1-C6 alkyl group, or a C1-C6 alkoxy group, R2 represents a C3-C6 cycloalkylsulfanyl group, a C3-C6 cycloalkylsulfinyl group, or a C3-C6 cycloalkylsulfonyl group, and A represents a substituted or unsubstituted heteroaryl group).Type: ApplicationFiled: March 6, 2008Publication date: April 22, 2010Inventors: Yasumichi Fukuda, Yoshikazu Asahina, Masanori Takadoi, Kohei Ohata, Tomohiro Ide, Fumiyoshi Kobayashi, Shinji Kobayashi, Kanji Komatsu, Masanori Yamamoto
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Publication number: 20100093825Abstract: Summary Novel bicycloester derivatives and pharmaceutically acceptable salts thereof have high DPP-IV inhibitory activity. Solving Means The novel bicycloester derivatives are represented by the general formula (1): Pharmaceutically acceptable salts thereof are also included (Example: (2S,4S)-1-[[(N-(4-ethoxycarbonylbicyclo[2.2.2]oct-1-yl)amino]acetyl]-4-fluoropyrrolidine-2-carbonitrile)).Type: ApplicationFiled: December 8, 2009Publication date: April 15, 2010Inventors: Yasumichi Fukuda, Yoshikazu Asahina, Kohei Ohata, Kazuya Yokota, Koji Murakami, Toshiyuki Matsui
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Publication number: 20100016304Abstract: A compound represented by the following formula (1): (wherein the carbon atom denoted by * is in the R-configuration; R1 and R2 are each independently a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a hydroxyamino group, a nitro group, a cyano group, a sulfamoyl group, a C1-C6 alkyl group, a C1-C6 alkoxy group, a C1-C6 alkylsulfanyl group, a C1-C6 alkylsulfinyl group or a C1-C6 alkylsulfonyl group; and A is a substituted or unsubstituted heteroaryl group), or a pharmaceutically acceptable salt thereof.Type: ApplicationFiled: December 21, 2007Publication date: January 21, 2010Inventors: Yasumichi Fukuda, Yoshikazu Asahina, Ayako Nakamura, Kenji Fujita, Tomohiro Ide, Fumiyoshi Kobayashi, Shinji Kobayashi, Kanji Komatsu, Masanori Yamamoto
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Patent number: 7560569Abstract: Novel bicycloamide derivatives (general formula (1)) and pharmaceutically acceptable salts thereof effectively inhibit DPP-IV. The bicycloamide derivatives are represented by the general formula (1): Pharmaceutically acceptable salts thereof are also included (Example: (2S,4S)-1-[[(4-carbamoylbicyclo[2.2.2]oct-1-yl)amino]acetyl]-4-fluoropyrrolidine-2-carbonitrile)).Type: GrantFiled: February 17, 2005Date of Patent: July 14, 2009Assignee: Kyorin Pharmaceutical Co., LtdInventors: Yasumichi Fukuda, Yoshikazu Asahina, Satoru Katayama, Taku Shibue, Koji Murakami, Tomohiro Ide
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Publication number: 20090176824Abstract: Object To provide novel quinolonecarboxylic acid compounds serving as safe, strong antibacterial agents that are effective against drug-resistant bacteria that are less susceptible to conventional antibacterial agents. Solving Means There are provided 7-(4-substituted-3-cyclopropylaminomethylpyrrolidinyl)quinolonecarboxylic acid derivatives (such as 1-cyclopropyl-7-[(3S,4S)-3-cyclopropylaminomethyl-4-fluoro-1-pyrrolidinyl]-6-fluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid) that exhibit strong antibacterial activity against gram-positive bacteria, such as MRSA, PRSP and VRE, while being safe.Type: ApplicationFiled: February 26, 2009Publication date: July 9, 2009Inventors: Yoshikazu Asahina, Masaya Takei
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Patent number: 7514571Abstract: A novel bicyclo derivative represented by the following general formula (1), or a pharmaceutically acceptable salt thereof, acts as an effective DPP-IV inhibitor: One example is (2S,4S)-1-[[N-(4-methylbicyclo[2,2,2]oct-1-yl)amino]acetyl]-4-fluoropyrrolidine-2-carbonitrile).Type: GrantFiled: February 22, 2005Date of Patent: April 7, 2009Assignee: Kyorin Pharmaceutical Co., Ltd.Inventors: Yasumichi Fukuda, Yoshikazu Asahina, Kazuya Yokota, Koji Murakami, Tomohiro Ide
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Patent number: 7514451Abstract: To provide novel quinolonecarboxylic acid compounds serving as safe, strong antibacterial agents that are effective against drug-resistant bacteria that are less susceptible to conventional antibacterial agents. There are provided 7-(4-substituted-3-cyclopropylaminomethylpyrrolidinyl)quinolonecarboxylic acid derivatives (such as 1-cyclopropyl-7-[(3S,4S)-3-cyclopropylaminomethyl-4-fluoro-1-pyrrolidinyl]-6-fluoro-1,4-dihydro-8-methoxy-4-oxo-3-quinolinecarboxylic acid) that exhibit strong antibacterial activity against gram-positive bacteria, such as MRSA, PRSP and VRE, while being safe.Type: GrantFiled: September 8, 2004Date of Patent: April 7, 2009Assignee: Kyorin Pharmaceutical Co., Ltd.Inventors: Yoshikazu Asahina, Masaya Takei
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Publication number: 20090048454Abstract: Novel intermediates for the production of aminoacetyl pyrrolidine carbonitrile derivatives ensure the safe and efficient production of the compounds. Specifically, the present invention provides a sulfonyloxyacetyl pyrrolidine derivative, represented by the following formula: (Chemical Formula 1) (wherein R1 is a substituted or unsubstituted C1-C6 alkyl group, a substituted or unsubstituted C3-C6 cycloalkyl group, a substituted or unsubstituted arylmethyl group, a substituted or unsubstituted aromatic hydrocarbon, a substituted or unsubstituted aromatic heterocyclic ring or a substituted or unsubstituted aliphatic heterocyclic ring; R2 is CONH2 or CN; and X is CH2, CHF or CF2.Type: ApplicationFiled: February 2, 2007Publication date: February 19, 2009Inventors: Yoshikazu Asahina, Yasumichi Fukuda, Futoshi Shiga