Patents by Inventor Kazuhiko Shigeno

Kazuhiko Shigeno 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).

  • Publication number: 20230295068
    Abstract: Provided are a compound represented by formula (I) or a salt thereof, a nerve growth promoter containing the compound or a salt thereof as an active ingredient, a pharmaceutical composition containing the compound or a salt thereof, a therapeutic agent for neurodegenerative diseases containing the compound or a salt thereof as an active ingredient, a therapeutic agent for amyotrophic lateral sclerosis containing the compound or a salt thereof as an active ingredient, a therapeutic agent for pain containing the compound or a salt thereof as an active ingredient, and a therapeutic agent for lower urinary tract dysfunction containing the compound or a salt thereof as an active ingredient.
    Type: Application
    Filed: August 6, 2021
    Publication date: September 21, 2023
    Applicant: TAIHO PHARMACEUTICAL CO., LTD.
    Inventors: Kazuhiko SHIGENO, Takahisa NOMA, Atsushi HAKOZAKI
  • Patent number: 9062035
    Abstract: This invention relates to a piperazine compound represented by Formula (I), wherein R1 is c1-6 alkyl; R2 is hydroxy, c1-6 alkyl that may have one or more substituents, —(C?O)—N(R2)(R4), or —(C?O)—OR5; R3 and R4 are the same or different, and each represents hydrogen or c1-6 alkyl that may have one or more substituents, or R3 and R4, taken together with a nitrogen atom to which R3 and R4 are attached, may form a saturated heterocyclic group; R5 is hydrogen or c1-6 alkyl that may have one or more 15 substituents; and n is 1 or 2; or a salt thereof.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: June 23, 2015
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Yoshihiro Urade, Makoto Kitade, Kazuhiko Shigeno, Keiko Yamane, Katsunao Tanaka
  • Patent number: 8865714
    Abstract: This invention relates to a piperazine compound represented by Formula (I), wherein R1 is C1-6 alkyl; R2 is hydroxy, C1-6 alkyl that may have one or more substituents, —(C?O)—N(R3)(R4), or —(C?O)—OR5; R3 and R4 are the same or different, and each represents hydrogen or C1-6 alkyl that may have one or more substituents, or R3 and R4, taken together with a nitrogen atom to which R3 and R4 are attached, may form a saturated heterocyclic group; R5 is hydrogen or C1-6 alkyl that may have one or more substituents; and n is 1 or 2; or a salt thereof.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: October 21, 2014
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Yoshihiro Urade, Makoto Kitade, Kazuhiko Shigeno, Keiko Yamane, Katsunao Tanaka
  • Patent number: 8765750
    Abstract: The present invention provides a piperazine compound represented by Formula (I) or a salt thereof, wherein X represents CH or an N atom; R1 represents C1-6 alkyl; R2 represents C1-6 alkyl that may have one or more substituents, C2-6 alkenyl that may have one or more substituents, —(C?O)—N(R3)(R4), or —(C?O)—OR5, R3 and R4 are the same or different, and each represents hydrogen or C1-6 alkyl that may have one or more substituents; or R3 and R4, taken together with a nitrogen atom to which R3 and R4 are attached, may form a saturated heterocyclic group; and R5 represents hydrogen or C1-6 alkyl that may have one or more substituents or aralkyl.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: July 1, 2014
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Yoshihiro Urade, Makoto Kitade, Kazuhiko Shigeno, Keiko Yamane, Katsunao Tanaka
  • Publication number: 20140128394
    Abstract: This invention relates to a piperazine compound represented by Formula (I), wherein R1 is c1-6 alkyl; R2 is hydroxy, c1-6 alkyl that may have one or more substituents, —(C=0)-N(R2)(R4), or —(C=0)-0R5; R3 and R4 are the same or different, and each represents hydrogen or c1-6 alkyl that may have one or more substituents, or R3 and R4, taken together with a nitrogen atom to which R3 and R4 are attached, may form a saturated heterocyclic group; R5 is hydrogen or c1-6 alkyl that may have one or more 15 substituents; and n is 1 or 2; or a salt thereof.
    Type: Application
    Filed: January 8, 2014
    Publication date: May 8, 2014
    Applicant: TAIHO PHARMACEUTICAL CO., LTD.
    Inventors: Yoshihiro URADE, Makoto KITADE, Kazuhiko SHIGENO, Keiko YAMANE, Katsunao TANAKA
  • Publication number: 20120309760
    Abstract: The present invention provides a piperazine compound represented by Formula (I) or a salt thereof, wherein X represents CH or an N atom; R1 represents C1-6 alkyl; R2 represents C1-6 alkyl that may have one or more substituents, C2-6 alkenyl that may have one or more substituents, —(C?O)—N(R3)(R4), or —(C?O)—OR5, R3 and R4 are the same or different, and each represents hydrogen or C1-6 alkyl that may have one or more substituents; or R3 and R4, taken together with a nitrogen atom to which R3 and R4 are attached, may form a saturated heterocyclic group; and R5 represents hydrogen or C1-6 alkyl that may have one or more substituents or aralkyl.
    Type: Application
    Filed: January 19, 2011
    Publication date: December 6, 2012
    Applicant: Taiho Pharmaceutical Co., Ltd.
    Inventors: Yoshihiro Urade, Makoto Kitade, Kazuhiko Shigeno, Keiko Yamane, Katsunao Tanaka
  • Publication number: 20110319413
    Abstract: This invention relates to a piperazine compound represented by Formula (I), wherein R1 is C1-6 alkyl; R2 is hydroxy, C1-6 alkyl that may have one or more substituents, —(C?O)—N(R3)(R4), or —(C?O)—OR5; R3 and R4 are the same or different, and each represents hydrogen or C1-6 alkyl that may have one or more substituents, or R3 and R4, taken together with a nitrogen atom to which R3 and R4 are attached, may form a saturated heterocyclic group; R5 is hydrogen or C1-6 alkyl that may have one or more substituents; and n is 1 or 2; or a salt thereof.
    Type: Application
    Filed: March 8, 2010
    Publication date: December 29, 2011
    Applicant: TAIHO PHARMACEUTICAL CO., LTD.
    Inventors: Yoshihiro Urade, Makoto Kitade, Kazuhiko Shigeno, Keiko Yamane, Katsunao Tanaka
  • Patent number: 6818764
    Abstract: A method of manufacturing substance GM-95 having general formula [I], comprising (a) deprotecting a macrocyclic compound having general formula [II] (wherein, R1's are the same or different and each represents a lower alkyl group, and R2 represents a thiol protecting group) by removing acetal protecting groups (the R1's) thereof, and forming an oxazole ring through an intramolecular cyclization reaction between produced formyl group and an amide group, and (b) deprotecting a resulting macrocyclic compound having general formula [III] (wherein, R2 is as mentioned above) by removing the thiol protecting group (R2) thereof, and forming a thiazoline ring through an intramolecular cyclization reaction between a thiol group thus produced and an amide group.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: November 16, 2004
    Assignees: Taiho Pharmaceutical Co., Ltd., Sosei Co., Ltd.
    Inventors: Shozo Yamada, Kazuhiko Shigeno, Kazuhiro Kitagawa, Shigeo Okajima, Tetsuji Asao
  • Publication number: 20040049029
    Abstract: A method of manufacturing substance GM-95 having general formula [I], comprising (a) deprotecting a macrocyclic compound having general formula [II] (wherein, R1's are the same or different and each represents a lower alkyl group, and R2 represents a thiol protecting group) by removing acetal protecting groups (the R1's) thereof, and forming an oxazole ring through an intramolecular cyclization reaction between produced formyl group and an amide group, and (b) deprotecting a resulting macrocyclic compound having general formula [III] (wherein, R2 is as mentioned above) by removing the thiol protecting group (R2) thereof, and forming a thiazoline ring through an intramolecular cyclization reaction between a thiol group thus produced and an amide group.
    Type: Application
    Filed: June 3, 2003
    Publication date: March 11, 2004
    Inventors: Shozo Yamada, Kazuhiko Shigeno, Kazuhiro Kitagawa, Shigeo Okajima, Tetsuji Asao
  • Patent number: 6110967
    Abstract: The invention relates an epoxysuccinamide derivative represented by a formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom, an alkyl or aminoalkyl group, R.sup.2 represents an aminoalkyl group which May be substituted, an aryl group which may be substituted, a heterocyclic group which may be substituted, an aralkyl group which may be substituted, or an alkyl group substituted by a heterocyclic ring which may be substituted, or R.sup.1 and R.sup.2 may form a nitrogen-containing heterocyclic ring, which may be substituted, together with the adjacent nitrogen atoms, and R.sup.3 and R.sup.4 are the same or different from each other and independently represent a hydrogen atom, or an alkyl or aralkyl group, or a salt thereof, a preparation process thereof, and a medicine comprising such a derivative or salt as an active ingredient.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: August 29, 2000
    Assignee: Taiho Pharmaceuticals Co., Ltd.
    Inventors: Tetsuji Asao, Tomohiro Yamashita, Yoshimitsu Suda, Shigeo Okajima, Yukio Tada, Nobuhiko Katsunuma, Shozo Yamada, Kazuhiko Shigeno, Atsuhiko Uemura
  • Patent number: 6046186
    Abstract: Novel compounds useful as inhibitors of estrone sulfatase are provided. The compounds have the structural formula (I) wherein r1 is an optional double bond, R.sup.1 and R.sup.2 are selected from the group consisting of hydrogen and lower alky, or together form a cyclic substituent (II) ##STR1## wherein Q is NH, O or CH.sub.2, and the other various substituents are as defined herein. Pharmaceutical compositions and methods for using the compounds of formula (I) to treat estrogen-dependent disorders are provided as well.
    Type: Grant
    Filed: December 24, 1997
    Date of Patent: April 4, 2000
    Assignee: SRI International
    Inventors: Masato Tanabe, Richard H. Peters, Wan-Ru Chao, Kazuhiko Shigeno
  • Patent number: 5861388
    Abstract: Novel compounds useful as inhibitors of estrone sulfatase are provided. The compounds have the structural formula (I) ##STR1## wherein X and Y, or Y and Z, form an oxathiazine dioxide ring or a dihydro-oxathiazine dioxide ring, and the other various substituents are as defined herein. Pharmaceutical compositions and methods for using the compounds of formula (I) to treat estrogen-dependent disorders are provided as well.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: January 19, 1999
    Assignee: SRI International
    Inventors: Masato Tanabe, Richard H. Peters, Wan-Ru Chao, Kazuhiko Shigeno
  • Patent number: 5763432
    Abstract: Novel compounds useful as inhibitors of estrone sulfatase are provided. The compounds have the structural formula (I) ##STR1## wherein X and Y, or Y and Z, form an oxathiazine dioxide ring or a dihydro-oxathiazine dioxide ring, and the other various substituents are as defined herein. Pharmaceutical compositions and methods for using the compounds of formula (I) to treat estrogen-dependent disorders are provided as well.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: June 9, 1998
    Assignee: SRI International
    Inventors: Masato Tanabe, Richard H. Peters, Wan-Ru Chao, Kazuhiko Shigeno
  • Patent number: 5728841
    Abstract: This invention is to provide a process for preparing 1-amino-1,2,3-triazole represented by formula (III): ##STR1## comprising cyclizing glyoxal bishydrazone represented by formula (I): ##STR2## by reaction with an aqueous hydrogen peroxide solution in the presence of a catalytic amount of a transition metal oxide represented by formula (II):M.sub.m O.sub.nwherein M represents a transition metal atom; and m and n, which may be the same or different, each represent an integer of 1 to 5.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: March 17, 1998
    Assignee: Taiho Pharmaceutical Co., Ltd.
    Inventors: Kazuhiko Shigeno, Tomoyasu Ono, Motoaki Tanaka, Shozo Yamada, Tetsuji Asao