Patents by Inventor Motosuke Yamanaka

Motosuke Yamanaka 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).

  • Patent number: 5741902
    Abstract: A 7-acyl-3-substituted carbamoyloxy cephem compound represented by the following formula (1): ##STR1## wherein A means a --CH.dbd. or --N.dbd. group; R.sup.1 denotes a hydroxyl, lower alkoxyl, fluorine-substituted lower alkoxyl or protected hydroxyl group; R.sup.2 and R.sup.3 are the same or different and individually represent a lower alkyl, hydroxyl-substituted lower alkyl, a carbamoyl-substituted lower alkyl group or cyano-substituted lower alkyl group, R.sup.2 is a hydrogen atom and R.sup.3 is a lower alkoxyl or alkyl group optionally substituted by one or more halogen atoms, or the group ##STR2## means a 4-6 membered heterocyclic group, which contains one nitrogen atom, or a morpholino group, said heterocyclic group or morpholino group being optionally substituted by one or more lower alkyl, hydroxyl and/or hydroxyl-substituted lower alkyl groups; and R.sup.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: April 21, 1998
    Assignee: Eisai Co., Ltd.
    Inventors: Shigeto Negi, Motosuke Yamanaka, Kanemasa Katsu, Isao Sugiyama, Yuuki Komatu, Atsushi Kamata, Akihiko Tsuruoka, Yoshimasa Machida
  • Patent number: 5604217
    Abstract: A 7-acyl-3-substituted carbamoyloxy cephem compound represented by the following formula (1): ##STR1## wherein A means a --CH.dbd. or --N.dbd. group; R.sup.1 denotes a hydroxyl, lower alkoxyl, fluorine-substituted lower alkoxyl or protected hydroxyl group; R.sup.2 and R.sup.3 are the same or different and individually represent a lower alkyl, hydroxyl-substituted lower alkyl, a carbamoyl-substituted lower alkyl group or cyano-substituted lower alkyl group, R.sup.2 is a hydrogen atom and R.sup.3 is a lower alkoxyl or alkyl group optionally substituted by one or more halogen atoms or the group ##STR2## means a 4-6 membered heterocyclic group, which contains one nitrogen atom, or a morpholino group, said heterocyclic group or morpholino group being optionally substituted by one or more lower alkyl, hydroxyl and/or hydroxyl-substituted lower alkyl groups; and R.sup.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: February 18, 1997
    Assignee: Eisai Co., Ltd.
    Inventors: Shigeto Negi, Motosuke Yamanaka, Kanemasa Katsu, Isao Sugiyama, Yuuki Komatu, Atsushi Kamata, Akihiko Tsuruoka, Yoshimasa Machida
  • Patent number: 5587473
    Abstract: A 7-acyl-3-substituted carbamoyloxy cephem compound represented by the following formula (1): ##STR1## wherein A means a --CH.dbd. or --N.dbd. group; R.sup.1 denotes a hydroxyl, lower alkoxyl, fluorine-substituted lower alkoxyl or protected hydroxyl group; R.sup.2 and R.sup.3 are the same or different and individually represent a lower alkyl, hydroxyl-substituted lower alkyl, a carbamoyl-substituted lower alkyl group or cyano-substituted lower alkyl group, R.sup.2 is a hydrogen atom and R.sup.3 is a lower alkoxyl or alkyl group optionally substituted by one or more halogen atoms, or the group ##STR2## means a 4-6 membered heterocyclic group, which contains one nitrogen atom, or a morpholino group, said heterocyclic group or morpholino group being optionally substituted by one or more lower alkyl, hydroxyl and/or hydroxyl-substituted lower alkyl groups; and R.sup.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: December 24, 1996
    Assignee: Eisai Co., Ltd.
    Inventors: Shigeto Negi, Motosuke Yamanaka, Kanemasa Katsu, Isao Sugiyama, Yuuki Komatu, Atsushi Kamata, Akihiko Tsuruoka, Yoshimasa Machida
  • Patent number: 5563265
    Abstract: A 7-acyl-3-substituted carbamoyloxy cephem compound represented by the following formula (1): ##STR1## wherein A means a --CH.dbd. or --N.dbd. group; R.sup.1 denotes a hydroxyl, lower alkoxyl, fluorine-substituted lower alkoxyl or protected hydroxyl group; R.sup.2 and R.sup.3 are the same or different and individually represent a lower alkyl, hydroxyl-substituted lower alkyl, a carbamoyl-substituted lower alkyl group or cyano-substituted lower alkyl group, R.sup.2 is a hydrogen atom and R.sup.3 is a lower alkoxyl or alkyl group optionally substituted by one or more halogen atoms, or the group ##STR2## means a 4-6 membered heterocyclic group, which contains one nitrogen atom, or a morpholino group, said heterocyclic group or morpholino group being optionally substituted by one or more lower alkyl, hydroxyl and/or hydroxyl-substituted lower alkyl groups; and R.sup.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: October 8, 1996
    Assignee: Eisai Co., Ltd.
    Inventors: Shigeto Negi, Motosuke Yamanaka, Kanemasa Katsu, Isao Sugiyama, Yuuki Komatu, Atsushi Kamata, Akihiko Tsuruoka, Yoshimasa Machida
  • Patent number: 5559225
    Abstract: A 7-acyl-3-substituted carbamoyloxy cephem compound represented by the following formula (1): ##STR1## wherein A means a --CH.dbd. or --N.dbd. group; R.sup.1 denotes a hydroxyl, lower alkoxyl or protected hydroxyl group; R.sup.2 and R.sup.3 are the same or different and individually represent a lower alkyl, hydroxyl-substituted lower alkyl, a carbamoyl-substituted lower alkyl group or cyano-substituted lower alkyl group, R.sup.2 is a hydrogen atom and R.sup.3 is a lower alkoxyl or alkyl group optionally substituted by one or more halogen atoms, or the group ##STR2## means a 4-6 membered heterocyclic group, which contains one nitrogen atom, or a morpholino group, said heterocyclic group or morpholino group being optionally substituted by one or more lower alkyl, hydroxyl and/or hydroxyl-substituted lower alkyl groups; and R.sup.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: September 24, 1996
    Assignee: Eisai Co., Ltd.
    Inventors: Shigeto Negi, Motosuke Yamanaka, Kanemasa Katsu, Isao Sugiyama, Yuuki Komatu, Atsushi Kamata, Akihiko Tsuruoka, Yoshimasa Machida
  • Patent number: 5444083
    Abstract: A pyrrolidine compound having the following formula and a pharmacologically acceptable salt thereof is disclosed. It is useful in the pharmaceutical field. ##STR1## in which X is hydrogen, a halogen, or a lower alkyl, Y is --(CH2)n--, n being zero, 1 or 2, --S(O)p--, p being zero, 1 or 2, --O--, or --NH-- and R is phenyl, a substituent-having phenyl, naphtyl, a substituent-having naphthyl, a heteroaryl or a substituent-having heteroaryl.
    Type: Grant
    Filed: January 22, 1990
    Date of Patent: August 22, 1995
    Assignee: Eisai Co., Ltd.
    Inventors: Motosuke Yamanaka, Tomonori Hoshiko, Shinji Suda, Naoki Yoneda, Nobuyuki Mori, Mitsumasa Shino, Hiroki Ishihara, Mamoru Saito, Toshiyuki Matsuoka
  • Patent number: 5246946
    Abstract: A piperidine compound has the generic formula and is useful to treat arrhythmia. ##STR1## in which R1 is a lower alkyl and W is: ##STR2## X is --S--, --SO-- or --SO2--, R2 is hydrogen or --(CH2)n--Y, n is an integer of 1 to 5, Y is an aryl, pyridyl or a substituted pyridyl, X' is --CO-- or --CH(OH)--,p is an integer of 1 to 4, R12 is hydrogen or a lower alkyl, Y' is --(CH2)m--A, m is 1 or 2, A is an aryl, a substituted aryl, pyridyl or a substituted pyridyl, R12 and Y may form a 5- or 6-membered ring or a 5- or 6-membered ring having one or more substituents andR22 is hydrogen, a halogen, a lower alkyl, a lower alkoxy or hydroxy.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: September 21, 1993
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Motosuke Yamanaka, Kazutoshi Miyake, Tomonori Hoshiko, Norio Minami, Tadao Shoji, Yoshiharu Daiku, Kohei Sawada, Kenichi Nomoto
  • Patent number: 5179095
    Abstract: A new piperidine compound is pharmacologically effective for treatment of the arrythmia and is defined by the formula: ##STR1## in which R.sup.1 is a lower alkyl or a tolyl, R.sup.2 is hydrogen, hydroxyl, a lower alkoxy or a lower alkyl, R.sup.3 is hydrogen, a lower alkyl, a lower alkenyl, a cycloalkyl or a cycloalkylalkyl, X is --CO--, --CH.sup.2 -- or --CHOH--, g is an integer of 1 to 3, h is an integer of 1 to 3, Y is hydrogen, a lower alkyl, a lower alkenyl, cyano, CH.sup.2 COOR, R being hydrogen or a lower alkyl, a cycloalkyl, a cycloalkylalkyl, ##STR2## 1 being 1 or 2, --A--B, A being --(CH.sub.2).sub.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: January 12, 1993
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Motosuke Yamanaka, Kazutoshi Miyake, Tomonori Hoshiko, Norio Minami, Tadao Shoji, Yoshiharu Daiku, Kohei Sawada, Kenichi Nomoto
  • Patent number: 5162347
    Abstract: A piperidine compound has the generic formula and is useful to treat arrhythmia. ##STR1## in which R1 is a lower alkyl and W is: ##STR2## X is --S--, --SO-- or --SO2--, R2 is hydrogen or --(CH2)n--Y, n is an integer of 1 to 5, Y is an aryl, pyridyl or a substituted pyridyl, X' is --CO-- or --CH(OH)--,p is an integer of 1 to 4, R12 is hydrogen or a lower alkyl, Y' is --(CH2)m--A, m is 1 or 2, A is an aryl, a substituted aryl, pyridyl or a substituted pyridyl, R12 and Y may form a 5- or 6-membered ring or a 5- or 6-membered ring having one or more substituents andR22 is hydrogen, a halogen, a lower alkyl, a lower alkoxy or hydroxy.
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: November 10, 1992
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Motosuke Yamanaka, Kazutoshi Miyake, Tomonori Hoshiko, Norio Minami, Tadao Shoji, Yoshiharu Daiku, Kohei Sawada, Kenichi Nomoto
  • Patent number: 5151417
    Abstract: 3-Substituted vinyl cephalosporin derivatives represented by the following formula: ##STR1## wherein R.sup.1 represents a hydroxyl or lower alkoxyl group, X represents a nitrogen atom or a group represented by the formula --CH.dbd., R.sup.2 represents a carboxyl group or a carboxyl group protected with a protecting group, and R.sup.3 is as defined herein, and pharmaceutically acceptable salts thereof are potent antibacterial agents. Processes for their preparation, intermediates in such processes, and antibacterial compositions containing them as active ingredients are also described.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: September 29, 1992
    Assignee: Eisai Co., Ltd.
    Inventors: Manabu Sasho, Hiroshi Yamauchi, Motosuke Yamanaka, Takaharu Nakamura, Kanemasa Katsu, Isao Sugiyama, Yuuki Komatu, Shigeto Negi
  • Patent number: 5118689
    Abstract: A new piperidine compound is pharmacologically effective for treatment of arrythmia and has the formula: ##STR1## in which R.sup.1 is lower alkyl or tolyl; R.sup.2 is hydrogen, lower alkyl, lower alkenyl, cycloalkyl or cycloalkylalkyl; X is --CO--, --CH.sub.2 -- or --CHOH--; the sum of g plus h equals the integer 3 or 4 with g and h being 1, 2 or 3; A is substituted or unsubstituted alkylene, alkenylene, --(CH.sub.2).sub.k --S--, wherein k is an integer of 2 to 5, or --(CH.sub.2).sub.p CO--, wherein p is an integer of 1 to 4; and B is a compound having at least one heterocyclic ring containing a nitrogen atom.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: June 2, 1992
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Motosuke Yamanaka, Kazutoshi Miyake, Tomonori Hoshiko, Norio Minami, Tadao Shoji, Yoshiharu Daiku, Kohei Sawada, Kenichi Nomoto
  • Patent number: 5082850
    Abstract: A piperidine compound has the generic formula and is useful to treat arrhythmia. ##STR1## in which R1 is a lower alkyl and W is: ##STR2## X is --S--, --SO-- or --SO2--, R2 is hydrogen or --(CH2)n--Y, n is an integer of 1 to 5, Y is an aryl, pyridyl or a substituted pyridyl, X' is --CO-- or --CH(OH)--,p is an integer of 1 to 4, R12 is hydrogen or a lower alkyl, Y' is --(CH2)m--A, m is 1 or 2, A is an aryl, a substituted aryl, pyridyl or a substituted pyridyl, R12 and Y may form a 5- or 6-membered ring or a 5- or 6-membered ring having one or more substituents andR22 is hydrogen, a halogen, a lower alkyl, a lower alkoxy or hydroxy.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: January 21, 1992
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Motosuke Yamanaka, Kazutoshi Miyake, Tomonori Hoshiko, Norio Minami, Tadao Shoji, Yoshiharu Daiku, Kohei Sawada, Kenichi Nomoto
  • Patent number: 4996215
    Abstract: A new piperidine compound is pharmacologically effective for treatment of the arrythmia and is defined by the formula: ##STR1## in which R.sup.1 is a lower alkyl or a tolyl, R.sup.2 is hydrogen, hydroxyl, a lower alkoxy or a lower alkyl, R.sup.3 is hydrogen, a lower alkyl, a lower alkenyl, a cycloalkyl or a cycloalkylalkyl, X is --CO--, --CH.sub.2 -- or --CHOH--, g is an integer of 1 to 3, h is an integer of 1 to 3, Y is hydrogen, a lower alkyl, a lower alkenyl, cyano, --CH.sub.2 COOR, R being hydrogen or a lower alkyl, a cycloalkyl, a cycloalkylalkyl, ##STR2## l being 1 or 2, --A--B, A being --(CH.sub.2).sub.
    Type: Grant
    Filed: September 15, 1989
    Date of Patent: February 26, 1991
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Motosuke Yamanaka, Kazutoshi Miyake, Tomonori Hoshiko, Norio Minami, Tadao Shoji, Yoshiharu Daiku, Kohei Sawada, Kenichi Nomoto
  • Patent number: 4977165
    Abstract: A piperidine compound has the generic formula and is useful to treat arrhythmia. ##STR1## in which R.sup.1 is a lower alkyl and W is: ##STR2## X is --S--, --SO-- or --SO.sub.2 --, R.sup.2 is hydrogen or --(CH.sub.2).sub.n --Y, n is an integer of 1 to 5, Y is an aryl, pyridyl or a substituted pyridyl, X' is --CO-- or --CH(OH)--,p is an integer of 1 to 4, R.sup.12 is hydrogen or a lower alkyl, Y' is --(CH.sub.2).sub.m --A, m is 1 or 2, A is an aryl, a substituted aryl, pyridyl or a substituted pyridyl, R.sup.12 and Y may form a 5- or 6-membered ring or a 5- or 6-membered ring having one or more substituents andR.sup.22 is hydrogen, a halogen, a lower alkyl, a lower alkoxy or hydroxy.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: December 11, 1990
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Motosuke Yamanaka, Kazutoshi Miyake, Tomonori Hoshiko, Norio Minami, Tadao Shoji
  • Patent number: 4876262
    Abstract: A new piperidine compound is pharmacologically effective for treatment of the arrythmia and is defined by the formula: ##STR1## in which R1 is a lower alkyl or a tolyl, R2 is hydrogen, hydroxyl, a lower alkoxy or a lower alkyl, R3 is hydrogen, a lower alkyl, a lower alkenyl, a cycloalkyl or a cycloalkylalkyl, X is --CO--, --CH2-- or --CHOH--, g is an integer of 1 to 3, h is an integer of 1 to 3, Y is hydrogen, a lower alkyl, a lower alkenyl, cyano, --CH2COOR, R being hydrogen or a lower alkyl, a cycloalkyl, a cycloalkylalkyl, ##STR2## 1 being 1 or 2, --A--B, A being --(CH2)n--, n being an integer of 1 to 5, a straight-chain alkylene group having 1 to 5 carbon atoms which is a divalent group derived from a straight-chain alkane having lower alkyl, phenyl or hydroxyl group(s) bonded directly to one or more carbon atoms constituting said alkane by removing a hydrogen atom bonded to each of the carbon atoms placed at both ends thereof,a straight-chain alkylene group having 1 to 5 carbon atoms which is a divalent
    Type: Grant
    Filed: February 18, 1987
    Date of Patent: October 24, 1989
    Assignee: Eisai Co., Ltd.
    Inventors: Hitoshi Oinuma, Motosuke Yamanaka, Kazutoshi Miyake, Tomonori Hoshiko, Norio Minami, Tadao Shoji, Yoshiharu Daiku, Kohei Sawada, Kenichi Nomoto
  • Patent number: 4803276
    Abstract: Novel 1-(imidazo[1,2-a]pyridin-6-yl)-2-alkanone derivatives and (imidazo [1,2-a]pyridin-6-yl) acetaldehyde derivatives are provided. The novel derivatives are intermediates for the production of 5-(6-imidazo[1,2-a]pyridyl)pyridine derivatives which are useful as cardiotonics.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: February 7, 1989
    Assignee: Eisai Co., Ltd.
    Inventors: Motosuke Yamanaka, Kazutoshi Miyake, Shinji Suda, Hideto Ohhara, Toshiaki Ogawa
  • Patent number: 4791202
    Abstract: 5-(6-Imidazo[1,2-a]pyridyl)pyridine derivatives represented by general formula: ##STR1## wherein X represents hydrogen atom or methyl group; Y represents cyano group, carboxamido group, hydrogen atom, amino group or a halogen atom; Z represents hydrogen atom or a lower alkyl group; W represents hydrogen atom or a lower alkyl group; R.sup.1 represents hydrogen atom, a lower alkyl group, phenyl group, a group shown by formula: --CH.sub.2 R.sup.4 in which R.sup.4 is a lower alkoxy group, or a group shown by formula: ##STR2## in which R.sup.5 and R.sup.6 are hydrogen atom or a lower alkyl group; R.sup.2 represents hydrogen atom or a halogen atom; and R.sup.3 represents hydrogen atom, a lower alkyl group or a halogen atom; or a tautomer thereof; and pharmacologically acceptable salts thereof are disclosed. The 5-(6-imidazo[1,2-a]pyridyl) pyridine derivatives are effective for treating congestive heart failures.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: December 13, 1988
    Assignee: Eisai Co., Ltd.
    Inventors: Motosuke Yamanaka, Kazutoshi Miyake, Shinji Suda, Hideto Ohhara, Toshiaki Ogawa
  • Patent number: 4751227
    Abstract: 5-(6-Imidazo[1,2-a]pyridyl)pyridine derivatives represented by general formula: ##STR1## wherein X represents hydrogen atom or methyl group; Y represents cyano group, carboxamido group, hydrogen atom, amino group or a halogen atom; Z represents hydrogen atom or a lower alkyl group; W represents hydrogen atom or a lower alkyl group; R.sup.1 represents hydrogen atom, a lower alkyl group, phenyl group, a group shown by formula: --CH.sub.2 R.sup.4 in which R.sup.4 is a lower alkoxy group, or a group shown by formula: ##STR2## in which R.sup.5 and R.sup.6 are hydrogen atom or a lower alkyl group R.sup.2 represents hydrogen atom or a halogen atom; and R.sup.3 represents hydrogen atom, a lower alkyl group or a halogen atom; or a tautomer thereof; and pharmacologically acceptable salts thereof are disclosed. The 5-(6-imidazo[1,2-a]pyridyl)pyridine derivatives are effective for treating congestive heart failures.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: June 14, 1988
    Assignee: Eisai Co., Ltd.
    Inventors: Motosuke Yamanaka, Kazutoshi Miyake, Shinji Suda, Hideto Ohhara, Toshiaki Ogawa
  • Patent number: 4661630
    Abstract: Described herein are novel carboxylic acid amide compounds or carboximide compounds represented by the general formula: ##STR1## wherein Z represents either the monoamido radical of an aromatic or cycloaliphatic ortho dicarboxylic acid or the amide of the corresponding anhydride, and their pharmaceutically acceptable salts; processes for the production thereof; and medicines containing the same. The novel compounds are useful as treating, preventing and improving agents for diseases attended with cerebral dysfunction as well as various symptoms caused by the said diseases.
    Type: Grant
    Filed: December 2, 1985
    Date of Patent: April 28, 1987
    Assignee: Eisai Co., Ltd.
    Inventors: Yasuji Harigaya, Hiroo Ogura, Mitsuo Mihara, Motosuke Yamanaka, Kiyomi Yamatsu
  • Patent number: 4602031
    Abstract: An antidepressive imidazole compound of the formula: ##STR1## wherein R.sub.1 is lower alkyl, R.sub.2 is hydrogen or lower alkyl, and R.sub.3, R.sub.4 and R.sub.5 are hydrogen, lower alkyl, trifluoromethyl, amino, mono- or di-lower alkylamino, heterocyclic amino, halogen or ##STR2## (in which R.sub.6 is hydrogen, lower alkyl or lower alkylsulfonyl, A is carbonyl or sulfonyl, and R.sub.7 is lower alkyl, halogenated lower alkyl, mono- or di-lower alkylamino, mono- or di-lower alkylaminoalkyl, unsubstituted phenyl or phenyl having halogen, lower alkyl, lower alkoxy or trifluoromethyl, phenylamino or phenylamino having halogen, lower alkyl, lower alkoxy or trifluoromethyl); and their pharmaceutically acceptable acid addition salts.
    Type: Grant
    Filed: June 6, 1985
    Date of Patent: July 22, 1986
    Assignee: Eisai Co., Ltd.
    Inventors: Motosuke Yamanaka, Isao Saito, Kiyomi Yamatsu, Takako Fujimoto