Patents by Inventor Takenori Hitaka
Takenori Hitaka 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: 9346822Abstract: The present invention provides a compound represented by the formula: wherein R1 is a C1-4 alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a hydroxy group, (3?) a C1-4 alkyl and (4?) a C1-4 alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a C1-4 alkoxy-C1-4 alkyl, (3?) a mono-C1-4 alkyl-carbamoyl-C1-4 alkyl, (4?) a C1-4 alkoxy and (5?) a mono-C1-4 alkylcarbamoyl-C1-4 alkoxy, or the like; R3 is a C1-4 alkyl; R4 is a C1-4 alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.Type: GrantFiled: April 11, 2014Date of Patent: May 24, 2016Assignee: Takeda Pharmaceutical Company LimitedInventors: Nobuo Cho, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusaka, Nobuhiro Suzuki
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Patent number: 8883788Abstract: Provided is a compound having a PDE10A inhibitory action, and useful as a medicament for the prophylaxis or treatment of mental diseases such as schizophrenia and the like, and the like. A compound represented by the formula (I): wherein each symbol is as defined in the DESCRIPTION, or a salt thereof.Type: GrantFiled: August 3, 2011Date of Patent: November 11, 2014Assignee: Takeda Pharmaceutical Company LimitedInventors: Tomoaki Hasui, Makoto Fushimi, Hironori Kokubo, Takenori Hitaka, Shotaro Miura, Takahiko Taniguchi
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Publication number: 20140221381Abstract: The present invention provides a compound represented by the formula: wherein R1 is a C1-4 alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a hydroxy group, (3?) a C1-4 alkyl and (4?) a C1-4 alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a C1-4 alkoxy-C1-4 alkyl, (3?) a mono-C1-4 alkyl-carbamoyl-C1-4 alkyl, (4?) a C1-4 alkoxy and (5?) a mono-C1-4 alkylcarbamoyl-C1-4 alkoxy, or the like; R3 is a C1-4 alkyl; R4 is a C1-4 alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.Type: ApplicationFiled: April 11, 2014Publication date: August 7, 2014Applicant: TAKEDA PHARMACEUTICAL COMPANY LIMITEDInventors: Nobuo CHO, Takashi IMADA, Takenori HITAKA, Kazuhiro MIWA, Masami KUSAKA, Nobuhiro SUZUKI
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Patent number: 8735401Abstract: The present invention provides a compound represented by the formula: wherein R1 is a C1-4 alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a hydroxy group, (3?) a C1-4 alkyl and (4?) a C1-4 alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a C1-4 alkoxy-C1-4 alkyl, (3?) a mono-C1-4 alkyl-carbamoyl-C1-4 alkyl, (4?) a C1-4 alkoxy and (5?) a mono-C1-4 alkylcarbamoyl-C1-4 alkoxy, or the like; R3 is a C1-4 alkyl; R4 is a C1-4 alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.Type: GrantFiled: September 23, 2011Date of Patent: May 27, 2014Assignee: Takeda Pharmaceutical Company LimitedInventors: Nobuo Cho, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusuka, Nobuhiro Suzuki
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Publication number: 20130137700Abstract: Provided is a compound having a PDE10A inhibitory action, and useful as a medicament for the prophylaxis or treatment of mental diseases such as schizophrenia and the like, and the like. A compound represented by the formula (I): wherein each symbol is as defined in the DESCRIPTION, or a salt thereof.Type: ApplicationFiled: August 3, 2011Publication date: May 30, 2013Inventors: Tomoaki Hasui, Makoto Fushimi, Hironori Kokubo, Takenori Hitaka, Shotaro Miura, Jun Kunitomo, Takahiko Taniguchi
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Publication number: 20120071486Abstract: The present invention provides a compound represented by the formula: wherein R1 is a C1-4 alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a hydroxy group, (3?) a C1-4 alkyl and (4?) a C1-4 alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a C1-4 alkoxy-C1-4 alkyl, (3?) a mono-C1-4 alkyl-carbamoyl-C1-4 alkyl, (4?) a C1-4 alkoxy and (5?) a mono-C1-4 alkylcarbamoyl-C1-4 alkoxy, or the like; R3 is a C1-4 alkyl; R4 is a C1-4 alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.Type: ApplicationFiled: September 23, 2011Publication date: March 22, 2012Applicant: TAKEDA PHARMACEUTICAL COMPANY LIMITEDInventors: Nobuo Cho, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusaka, Nobuhiro Suzuki
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Patent number: 8058280Abstract: The present invention provides a compound represented by the formula: wherein R1 is a C1-4 alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a hydroxy group, (3?) a C1-4 alkyl and (4?) a C1-4 alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a C1-4 alkoxy-C1-4 alkyl, (3?) a mono-C1-4 alkyl-carbamoyl-C1-4 alkyl, (4?) a C1-4 alkoxy and (5?) a mono-C1-4 alkylcarbamoyl-C1-4 alkoxy, or the like; R3 is a C1-4 alkyl; R4 is a C1-4 alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.Type: GrantFiled: August 31, 2007Date of Patent: November 15, 2011Assignee: Takeda Pharmaceutical Company LimitedInventors: Nobuo Cho, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusaka, Nobuhiro Suzuki
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Patent number: 7569570Abstract: The present invention provides a thienopyrimidine compound, represented by the formula [wherein, R1 is C1-4 alkyl, R2 is (1) phenyl optionally having a substituent such as amino, mono C1-4 alkylamino and di C1-4 alkylamino, or (2) a heterocyclic group optionally having a substituent such as amino, mono C1-4 alkylamino and di C1-4 alkylamino and the like, R3 is a hydrogen atom or C1-4 alkyl, R4 is C1-4 alkyl optionally having a substituent such as C1-4 alkoxy-carbonyl, carboxyl, mono C1-4 alkylamino and N—C1-4 alkyl-N—C7-10 aralkylamino and the like] or a salt thereof, which has antagonistic action for gonadotropin-releasing hormone.Type: GrantFiled: January 29, 2003Date of Patent: August 4, 2009Assignee: Takeda Pharmaceutical Company LimitedInventors: Shuichi Furuya, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusaka, Nobuhiro Suzuki
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Publication number: 20080176906Abstract: The present invention provides a novel pyrrole derivative having excellent androgen receptor antagonism, which is represented by the formula: wherein R1 represents a hydrogen atom, a cyano group or a group represented by the formula COORA (wherein RA represents an optional substituted C1-6 alkyl group), R2 and R4 are the same or different, and each represents a hydrogen atom, a C1-6 alkyl group, a C3-6 cycloalkyl group, a trifluoromethyl group, an amino-C1-6 alkyl group, a mono- or di-substituted amino-C1-6 alkyl group, an optionally halogenated C1-6 alkyl group substituted with an optionally substituted hydroxyl group, a C2-6 alkenyl group substituted with an optionally substituted hydroxyl group, a C1-6 alkyl group substituted with an optionally substituted and optionally oxidized thiol group, an optionally substituted with and optionally oxidized thiol group, a cyano group, an acyl group, an optionally substituted oxazolyl group or a 1,3-dioxolan-2-yl group, R3 represents a group represented by the forType: ApplicationFiled: December 13, 2005Publication date: July 24, 2008Applicant: Takeda Pharmaceutical Company LimitedInventors: Nobuyuki Matsunaga, Takenori Hitaka
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Publication number: 20080108623Abstract: The present invention provides a compound represented by the formula: wherein R1 is a C1-4 alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a hydroxy group, (3?) a C1-4 alkyl and (4?) a C1-4 alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a C1-4 alkoxy-C1-4 alkyl, (3?) a mono-C1-4 alkyl-carbamoyl-C1-4 alkyl, (4?) a C1-4 alkoxy and (5?) a mono-C1-4 alkylcarbamoyl-C1-4 alkoxy, or the like; R3 is a C1-4 alkyl; R4 is a C1-4 alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.Type: ApplicationFiled: August 31, 2007Publication date: May 8, 2008Applicant: Takeda Pharmaceutical Company LimitedInventors: Nobuo Cho, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusaka, Nobuhiro Suzuki
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Patent number: 7300935Abstract: The present invention provides a compound represented by the formula: wherein R1 is a C1-4alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a hydroxy group, (3?) a C1-4alkyl and (4?) a C1-4alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a C1-4alkoxy-C1-4alkyl, (3?) a mono-C1-4alkyl-carbamoyl-C1-4alkyl, (4?) a C1-4alkoxy and (5?) a mono-C1-4alkylcarbamoyl-C1-4alkoxy, or the like; R3 is a C1-4alkyl; R4 is a C1-4alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.Type: GrantFiled: January 28, 2004Date of Patent: November 27, 2007Assignee: Takeda Pharmaceutical CompanyInventors: Nobuo Cho, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusaka, Nobuhiro Suzuki
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Patent number: 7141598Abstract: The present invention provides a compound having a steroid C17,20-lyase-inhibitory activity and useful for the therapy and prophylaxis of tumor such as prostatism, breast cancer and the like, and a method for efficiently separating an optically active compound of this compound from a mixture of optical isomers thereof, a compound of the formula: wherein each symbol is as defined in the specification, a salt thereof or a prodrug thereof, and a method for obtaining an optically active compound by optically resolving a mixture of optical isomers by the use of a resolving agent such as tartranilic acid and the like.Type: GrantFiled: November 16, 2001Date of Patent: November 28, 2006Assignee: Takeda Pharmaceutical Company, Ltd.Inventors: Akihiro Tasaka, Takenori Hitaka, Nobuyuki Matsunaga, Masami Kusaka
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Publication number: 20060160829Abstract: The present invention provides a compound represented by the formula: wherein R1 is a C1-4 alkyl; R2 is (1) a 5- to 7-membered nitrogen-containing heterocyclic group which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a hydroxy group, (3?) a C1-4 alkyl and (4?) a C1-4 alkoxy, (2) a phenyl which may have a substituent selected from the group consisting of (1?) a halogen, (2?) a C1-4 alkoxy-C1-4 alkyl, (3?) a mono-C1-4 alkyl-carbamoyl-C1-4 alkyl, (4?) a C1-4 alkoxy and (5?) a mono-C1-4 alkylcarbamoyl-C1-4 alkoxy, or the like; R3 is a C1-4 alkyl; R4 is a C1-4 alkoxy, or the like; n is an integer of 1 to 4; or a salt thereof, as a thienopyrimidine compound having gonadotropin-releasing hormone antagonistic activity.Type: ApplicationFiled: January 28, 2004Publication date: July 20, 2006Inventors: Nobuo Cho, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusaka, Nobuhiro Suzuki
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Publication number: 20050222174Abstract: The present invention provides a thienopyrimidine compound, represented by the formula [wherein, R1 is C1-4 alkyl, R2 is (1) phenyl optionally having a substituent such as amino, mono C1-4 alkylamino and di C1-4 alkylamino, or (2) a heterocyclic group optionally having a substituent such as amino, mono C1-4 alkylamino and di C1-4 alkylamino and the like, R3 is a hydrogen atom or C1-4 alkyl, R4 is C1-4 alkyl optionally having a substituent such as C1-4 alkoxy-carbonyl, carboxyl, mono C1-4 alkylamino and N—C1-4 alkyl-N—C7-10 aralkylamino and the like] or a salt thereof, which has antagonistic action for gonadotropin-releasing hormone.Type: ApplicationFiled: January 29, 2003Publication date: October 6, 2005Applicant: Takeda Chemical Industries Ltd.Inventors: Shuichi Furuya, Takashi Imada, Takenori Hitaka, Kazuhiro Miwa, Masami Kusaka, Nobuhiro Suzuki
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Patent number: 6716863Abstract: A compound represented by the formula: wherein m is 1 or 2, R1 is a halogen or an optionally halogenated C1-2 alkyl; one of R2 and R3 is a hydrogen atom and the other is a group represented by the formula: wherein n is 3 or 4; R4 is a C1-4 alkyl group substituted by 1 or 2 hydroxy groups, or a salt thereof shows tyrosine kinase-inhibiting activity.Type: GrantFiled: July 24, 2001Date of Patent: April 6, 2004Assignee: Takeda Chemical Industries, Ltd.Inventors: Akihiro Tasaka, Takenori Hitaka, Etsuya Matsutani
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Publication number: 20040033935Abstract: The present invention provides a compound having a steroid C17,20-lyase-inhibitory activity and useful for the therapy and prophylaxis of tumor such as prostatism, breast cancer and the like, and a method for efficiently separating an optically active compound of this compound from a mixture of optical isomers thereof, a compound of the formula: 1Type: ApplicationFiled: May 16, 2003Publication date: February 19, 2004Inventors: Akihiro Tasaka, Takenori Hitaka, Nobuyuki Matsunaga, Masami Kusaka, Mari Adachi, Isao Oaki, Akio Ojida
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Publication number: 20040024035Abstract: A compound represented by the formula: 1Type: ApplicationFiled: July 17, 2003Publication date: February 5, 2004Inventors: Akihiro Tasaka, Takenori Hitaka, Etsuya Matsutani
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Publication number: 20020173526Abstract: A compound represented by the formula: 1Type: ApplicationFiled: July 24, 2001Publication date: November 21, 2002Inventors: Akihiro Tasaka, Takenori Hitaka, Etsuya Matsutani
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Patent number: 5539113Abstract: A process of making a compound of the formula ##STR1## wherein the ring A is a pyrrole or pyrroline ring, X is an amino group or a hydroxyl group, Y is a hydrogen atom, an amino group or a hydroxyl group, R is a hydrogen atom, a fluorine atom, an alkyl group, an alkenyl group or an alkynyl group, --COOR.sup.1 and --COOR.sup.2 are independently carboxyl groups which may be esterified and n is an integer of 2 to 4, and R may be different in each of the n repeating units, and salts thereof have excellent antitumor effects, and can be used as antitumor agents in mammals.Type: GrantFiled: December 6, 1993Date of Patent: July 23, 1996Assignee: Takeda Chemical Industries, Ltd.Inventors: Hiroshi Akimoto, Takenori Hitaka, Tetsuo Miwa
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Patent number: 5496822Abstract: The compounds of the formula, ##STR1## wherein the ring A is a pyrrole ring which may be hydrogenated; --B-- is a divalent cyclic or chain group which may be substituted; one of Q.sup.1 and Q.sup.2 is N, with the other being N or CH; W is a halogen or hydrogen atom or a group bonded to the bonding line with a carbon, nitrogen, oxygen or sulfur atom, provided that W is not --NH.sub.2 ; X is an amino, hydroxyl or mercapto group; Y is a hydrogen atom or a hydroxyl or amino group; Z is a straight-chain divalent group having a number of atoms of 2 to 5 composed of carbon atoms which each may be substituted, or carbon atoms which each may be substituted and one hetero atom which may be substituted; --COOR.sup.1 and --COOR.sup.2 each is the same as or different from the other and represents a carboxyl group which may be esterified, or salts thereof are provided.The compounds are produced by reacting compounds of the formula, ##STR2## wherein A, --B--, W, W, X, Y, Q.sup.1 and Q.sup.Type: GrantFiled: September 21, 1994Date of Patent: March 5, 1996Assignee: Takeda Chemical Industries, Ltd.Inventors: Hiroshi Akimoto, Takenori Hitaka