Patents by Inventor Shigeho Inaba

Shigeho Inaba 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: 4010154
    Abstract: Novel 1-substituted benzodiazepine derivatives and salt thereof having the formula, ##STR1## wherein R.sub.1 is a hydrogen atom, a halogen atom, a nitro group, a cyano group, a lower alkoxy group or a trifluoromethyl group; R.sub.2 is a pyridyl group or a group of the formula ##STR2## wherein R.sub.5 and R.sub.6 represent individually a hydrogen atom, a halogen atom, a lower alkyl group or a trifluoromethyl group); R.sub.3 is a hydrogen atom or a lower alkyl group; R.sub.4 is a lower alkyl, cycloalkyl, cycloalkylalkyl, aryl or aralkyl group; m is 1 or 2; and n is an integer of 1 to 4, and a process for preparation thereof and pharmaceutical use of the same.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: March 1, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisao Yamamoto, Shigeho Inaba, Toshiyuki Hirohashi, Michihiro Yamamoto, Kikuo Ishizumi, Mitsuhiro Akatsu, Isamu Maruyama, Kazuo Mori, Yoshiharu Kume, Takahiro Izumi
  • Patent number: 4010280
    Abstract: A phenoxyalkylamine derivative of the formula: ##STR1## and its pharmaceutically acceptable salts, which are useful as neuroleptic agents and a process for their preparation by reacting a compound of the formula: ##STR2## with a compound of the formula: ##STR3## wherein R.sub.1 and R.sub.2 are each hydrogen, halogen, C.sub.1 -C.sub.7 alkyl or C.sub.1 -C.sub.7 alkoxy, X is oxygen, sulfur, sulfinyl or NR (in which R is hydrogen or C.sub.1 -C.sub.7 alkyl), m and n are each an integer of 2, 3 or 4, and Y and Y' are each amino or halogen but they are different from each other.
    Type: Grant
    Filed: September 27, 1974
    Date of Patent: March 1, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4009173
    Abstract: Novel butyrophenone derivatives of the formula: ##STR1## wherein R.sub.1 represents a hydroxyl group or ##STR2## (wherein R.sub.6 and R.sub.7 are each a hydrogen atom or a lower alkyl group or, when taken together with the adjacent nitrogen atom, may form a heterocyclic group), R.sub.2 represents an optionally substituted phenyl group or ##STR3## (wherein R.sub.8 and R.sub.9 are each a hydrogen atom or a lower alkyl group or, when taken together with the adjacent nitrogen atom, may form a heterocyclic group), R.sub.4 represents a hydrogen atom, a lower alkyl group or an optionally substituted phenyl group, R.sub.5 represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group or a trifluoromethyl group, R.sub.10 represents a hydrogen atom or an acyl group represented by R.sub.3 CO- (wherein R.sub.3 is a hydrogen atom, a lower alkyl group or an optionally substituted phenyl group) and Z represents two hydrogen atoms or an oxygen atom, provided that when Z is an oxygen atom and R.sub.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: February 22, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kikuo Sasajima, Masaru Nakao, Isamu Maruyama, Keiichi Ono, Shigenari Katayama, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4009275
    Abstract: Phenoxypropylamine derivatives of the formula: ##STR1## (in which R.sub.2 is a halogen atom or a trifluoromethyl group) and R.sub.1 is a halogen atom or a C.sub.1 -C.sub.4 alkyl or C.sub.2 -C.sub.4 alkenyl group, and their pharmaceutically acceptable salts, which are useful as neuroleptic agents and can be prepared by reacting a compound of the formula: ##STR2## wherein X is a halogen atom and R.sub.1 is as defined above with a compound of the formula:H-Ywherein Y is as defined above.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: February 22, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4002755
    Abstract: Triazoloquinazolines of the formula, ##STR1## wherein R.sub.1 is C.sub.1.sub.-4 alkyl or aryl; R.sub.2 and R.sub.3 are independently hydrogen, halogen, trifluoromethyl, nitro, C.sub.1.sub.-4 alkyl or C.sub.1.sub.-4 alkoxy, or R.sub.2 and R.sub.3 together may form methylenedioxy; and R.sub.4 is hydrogen, C.sub.1.sub.-4 alkyl, aralkyl, C.sub.1.sub.-4 haloalkyl, or C.sub.3.sub.-6 cycloalkyl; and pharmaceutically acceptable acid addition salts thereof are prepared by (a) reacting a 2-hydrazinoquinazoline derivative with a carboxylic acid or reactive derivative thereof, (b) cyclizing a 2-acylhydrazinoquinazoline derivative with heating or (c) reacting a triazolylbenzophenone derivative with ammonia. Said triazoloquinazolines and pharmaceutically acceptable acid addition salts thereof show excellent anti-inflammatory and analgesic activities.
    Type: Grant
    Filed: February 25, 1975
    Date of Patent: January 11, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Michihiro Yamamoto, Shigeaki Morooka, Masao Koshiba, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 4002611
    Abstract: A 1-alkyl-1,2,4,5-tetrahydro-3H-1,4-benzodiazepine derivative is produced by contacting a 1-aminoethyl-indole derivative with a suitable oxidizing agent and then reducing the resulting 1-acyl-2,3-dihydro-1H-1,4-benzodiazepine derivative. The starting 1-aminoethyl-indole derivative is prepared by subjecting a 3-phenyl-indole derivative to cyanomethylation (or carbamoylemethylation) and then reducing the resulting 1-cyanomethyl- (or 1-carbamoylmethyl)-indole derivative. The 1-acyl-1,2,4,5-tetrahydro-3H-1,4-benzodiazepine derivative is useful as a tranquillizer, muscle-relaxant, etc.
    Type: Grant
    Filed: February 7, 1969
    Date of Patent: January 11, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisao Yamamoto, Shigeho Inaba, Tadashi Okamoto, Toshiyuki Hirohashi, Kikuo Ishizumi, Michihiro Yamamoto, Isamu Maruyama, Kazuo Mori, Tsuyoshi Kobayashi
  • Patent number: 4001412
    Abstract: 1-Substituted-1,2-dihydrothieno[2,3-d]-pyrimidin-2-ones of the formula, ##STR1## wherein R is lower alkyl or cyclopropylmethyl, R.sub.1 is halogen, lower alkyl or nitro, R.sub.2 is hydrogen or lower alkyl and R.sub.3 is hydrogen or halogen, are obtained by treating a trihaloacetamidothiophene derivative with ammonia. These compounds have excellent pharmacological activities such as uricosuric activity.
    Type: Grant
    Filed: May 6, 1975
    Date of Patent: January 4, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshiyuki Hirohashi, Hiromi Sato, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3991048
    Abstract: A 1,4-benzodiazepine derivative, or a pharmaceutically acceptable acid salt thereof, of the formula, ##SPC1##Wherein R.sub.1 is hydrogen, halogen, nitro or trifluoromethyl; R.sub.2 and R.sub.3 are independently hydrogen, halogen, lower alkyl or trifluoromethyl; R.sub.4 is lower alkyl, alkenyl, trihaloalkyl, alkoxyalkyl, alkenyloxyalkyl, alkoxyalkoxyalkyl, alkanoyloxyalkyl, cycloalkylalkyl, alkylthioalkyl, alkylsulfinylalkyl, alkylsulfonylalkyl or a group of the formula ##EQU1## in which R.sub.6 and R.sub.7 are independently lower alkyl, and n is an integer of 1 to 4; and R.sub.5 is hydrogen or lower alkyl, is obtained by reacting a benzophenone derivative of the formula, ##SPC2##Wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined above, with a 2-isocyanatoacetyl chloride derivative of the formula ##EQU2## wherein R.sub.5 is as defined above.
    Type: Grant
    Filed: February 25, 1975
    Date of Patent: November 9, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kikuo Ishizumi, Kazuo Mori, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3989829
    Abstract: Benzodiazepine derivatives of the formula, ##SPC1##Wherein R.sub.1 is a C.sub.2-4 alkenyl group, R.sub.2 is a halogen atom and R.sub.3 is a hydrogen or halogen atom, which are useful as minor tranquilizer and anticonvulsant. These compounds are prepared by reacting a compound of the formula, ##SPC2##Wherein R.sub.1, R.sub.2, and R.sub.3 are as defined above, with a compound of the formula, ##EQU1## wherein X is an oxygen or sulfur atom.
    Type: Grant
    Filed: July 10, 1975
    Date of Patent: November 2, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hisao Yamamoto, Shigeho Inaba, Toshiyuki Hirohashi, Michihiro Yamamoto, Kikuo Ishizumi, Mitsuhiro Akatsu, Isamu Maruyama, Yoshiharu Kume, Kazuo Mori, Takahiro Izumi
  • Patent number: 3980645
    Abstract: Fused quinazolinone derivatives of the formula, ##SPC1##Wherein R.sub.1 and R.sub.2 are individually hydrogen, C.sub.1.sub.-4 alkyl, C.sub.1.sub.-4 alkoxy, nitro, C.sub.1.sub.-4 alkylsulfonyl or halogen; R.sub.3 is pyridyl, thienyl or a group of the formula ##SPC2##Wherein R.sub. 4 is hydrogen or halogen; R is hydrogen, C.sub.1.sub.-4 alkyl, C.sub.2.sub.-5 alkenyl, aralkyl, (C.sub.3.sub.-6 cycloalkyl)C.sub.1.sub.-4 alkyl, (C.sub.1.sub.-4 alkoxy)C.sub.1.sub.-4 alkyl, (C.sub.1.sub.-4 alkylthio)C.sub.1.sub.-4 alkyl, hydroxy-C.sub.1.sub.-4 alkyl or C.sub.2.sub.-5 alkanoyloxy-C.sub.1.sub.-4 alkyl; Y is oxygen, or a group of the formula N - R.sub.5, wherein R.sub.5 is hydrogen or C.sub.1.sub.-4 alkyl; and Z is C.sub.2.sub.-5 alkylene or alkenylene, are prepared by reacting a trihaloacetamidophenyl ketone derivative of the formula, ##SPC3##Wherein R.sub.1, R.sub.2, R.sub. 3 and R are as defined above; and X.sub.1, X.sub.2 and X.sub.3 are halogen, with an amine of the formula, HY - Z - NH.sub.
    Type: Grant
    Filed: November 7, 1974
    Date of Patent: September 14, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shigeho Inaba, Michihiro Yamamoto, Kikuo Ishizumi, Kazuo Mori, Masao Koshiba, Hisao Yamamoto
  • Patent number: 3979390
    Abstract: A process for producing butyrophenone derivatives of the formula: ##EQU1## which comprises reacting a compound of the formula: ##SPC1##With an amine of the formulaH-W(wherein Ar represents a group of either one of the formulas: ##SPC2##Z is a secondary amino group and W is the residue of an amine excluding a hydrogen atom therefrom). The said butyrophenone derivatives and their salts exhibit a variety of beneficial pharmacological activities including a central and autonomic nervous system depressing activity.
    Type: Grant
    Filed: March 16, 1973
    Date of Patent: September 7, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kikuo Sasajima, Keiichi Ono, Masaru Nakao, Isamu Maruyama, Masaharu Takayama, Shigenari Katayama, Junki Katsube, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3974145
    Abstract: Novel indolylacetic acid derivatives, which have excellent anti-inflammatory, antipyretic and analgesic activities, represented by the formula, ##SPC1##Wherein X.sub.1 and X.sub.2 each is a member selected from the group consisting of oxygen and methylene; A is a member selected from the group consisting of unsubstituted saturated hydrocarbon chain having up to 5 carbon atoms, unsubstituted unsaturated hydrocarbon chain having up to 5 carbon atoms and substituted saturated or substituted ethylenically unsaturated hydrocarbon chain having up to 5 carbon atoms, in which the substituents are selected from the group consisting of halogen or phenyl, the hydrocarbon chain being straight or blanched one; m is 0 or 1; n is 1 or 2; R.sub.1 and R.sub.2 each is a member selected from the group consisting of hydrogen and alkyl having up to 4 carbon atoms; R.sub.
    Type: Grant
    Filed: February 4, 1974
    Date of Patent: August 10, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Michio Kimura, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3970654
    Abstract: Quinazolinone derivatives of the formula, ##SPC1##Wherein R is a polyalicyclic hydrocarbon group; R.sup.1 and R.sup.2 are independently a hydrogen atom, a nitro group, a trifluoromethyl group or a methylsulfonyl group; R.sup.3 is a phenyl group, a substituted phenyl group, a pyridyl group or a thienyl group; and n is 0 or an integer of 1 to 3, have potent antiviral activity with low toxicities. These compounds can be prepared using a variety of processes analogous to known methods, for example, by oxidizing a 3,4-dihydro-2(1H)-quinazolinone having a polyalicyclic hydrocarbon group bonded through an alkylene group at the 1 position.
    Type: Grant
    Filed: July 30, 1974
    Date of Patent: July 20, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Michihiro Yamamoto, Shigeaki Morooka, Masao Koshiba, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3966939
    Abstract: Novel 2-substituted 6,7-benzomorphan derivatives of the formula: ##SPC1##And acid addition salts thereof, which are useful as non-addicting analgesics, pain relieving agents and antitussives and can be prepared by reacting 6,7-benzomorphan derivatives of the formula: ##SPC2##With the reactive derivatives of alcohols of the formula: ##EQU1## [wherein R is a hydrogen atom, a hydroxyl group, an alkoxy group or an alkanoyloxy group; R.sub.1 is a hydrogen atom, an alkyl group, an alkoxyalkyl group or a substituted or unsubstituted aryl group; R.sub.3 is a hydrogen atom or a hydroxyl group; R.sub.4 is a hydrogen atom, an alkyl group or a substituted or unsubstituted aryl group, or R.sub.3 and R.sub.4 may form an alkylidene group or a carbonyl group together with the carbon atom to which these substituents are bonded; R.sub.2, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.10 are each a hydrogen atom or an alkyl group; A is an alkylene group; and m is an integer of 0 to 2].
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: June 29, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kenji Kobayashi, Toshitsugu Fukumaru, Hiroyuki Mizote, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3965106
    Abstract: A 3-phenoxypropylamine derivative of the formula: ##SPC1##Wherein Y is ##SPC2##(wherein R.sub.1 is a halogen atom or a trifluoromethyl group) or ##SPC3##(wherein R.sub.2 is a lower alkyl group) and its pharmaceutically acceptable salts which are useful as central nervous system depressing agents.
    Type: Grant
    Filed: December 12, 1973
    Date of Patent: June 22, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3960873
    Abstract: Novel N-substituted heterocyclic derivatives represented by the formula, ##SPC1##Wherein R.sub.1 is hydrogen atom, lower alkyl, lower alkoxy, nitro, halogen or trifluoromethyl group; R.sub.2 is hydrogen atom or lower alkyl group; X is sulfur atom, sulfinyl or sulfonyl group; Y is ##EQU1## group (wherein R.sub.3 is phenyl or substituted phenyl group; R.sub.4 is hydrogen atom, hydroxy, lower alkyl, lower alkoxy, lower alkanoyl, lower alkanoyloxy, carbamoyl, N-(lower alkyl)-carbamoyl or N,N-di(lower akyl)-carbamoyl group; R.sub.5 is hydrogen atom, morpholino, pyrrolidinyl, piperidinyl, hexamethylenimino, lower alkyl, cyclo(lower alkyl), cyclo(lower alkyl)-(lower alkyl), hydroxy-(lower alkyl), (lower alkoxy)-(lower alkyl), phenyl or substituted phenyl group; k is 0 or 1 and m is 0, 1 or 2); and n is 3 or 4, and pharmaceutically acceptable salts thereof, which have excellent tranquillizing, anti-psychotonic, anti-emotional, anti-convulsive, anti-psychosis, sedative, analgesic or anti-hypertensive activities.
    Type: Grant
    Filed: June 21, 1974
    Date of Patent: June 1, 1976
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Isamu Maruyama, Hisao Yamamoto, Masaru Nakao, Shigeru Sakai, Kikuo Sasajima, Sumio Kitagawa, Shigeho Inaba
  • Patent number: 3961066
    Abstract: A novel 2-substituted-6,7-benzomorphan derivative of the formula: ##SPC1##And its acid addition salts, which are useful as non-addicting analgesics and antitussives and can be prepared by reacting a 2-unsubstituted-6,7-benzomorphan derivative of the formula: ##SPC2##With the reactive derivative of an alcohol of the formula:HOA',optionally followed by elimination of the protective group in the resulting product, wherein R.sub.1 is hydrogen, lower alkyl or acyl; R.sub.2 and R.sub.3 are each lower alkyl; A is lower alkyl, cyano(lower)alkyl, benzoyl(lower)alkyl, ar(lower)alkyl, lower alkenyl or cyclo(lower)alkyl(lower)alkyl; and A' is a group as mentioned in A or benzoyl(lower)alkyl of which the carbonyl group is masked with a suitable protective group.
    Type: Grant
    Filed: March 29, 1974
    Date of Patent: June 1, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshitsugu Fukumaru, Kenji Kobayashi, Hiroyuki Mizote, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3957783
    Abstract: Novel thienopyrimidine derivatives which have excellent pharmacological uricosuric activity are prepared by reacting a thiophene derivative with cyanic acid or a salt thereof, urea or a reactive ester of carbamic acid. If desired, alkylated, halogenated or nitrated thienopyrimidine derivatives are produced by reacting thienopyrimidine derivatives with an alkylating, halogenating or nitrating agent, respectively.
    Type: Grant
    Filed: May 7, 1973
    Date of Patent: May 18, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshiyuki Hirohashi, Hiromi Sato, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3953446
    Abstract: Quinazoline derivatives which have anti-inflammatory, antiviral, uricosuric activities are prepared by reacting an indole-2-carbonylazide derivative with an oxidizing agent under mild conditions.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: April 27, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kikuo Ishizumi, Kazuo Mori, Michihiro Yamamoto, Masao Koshiba, Shigeho Inaba, Hisao Yamamoto
  • Patent number: 3951986
    Abstract: 2-Propanol derivatives of the formula: ##SPC1##And their pharmaceutically acceptable acid addition salts, which are useful as medicaments and can be produced by reacting a compound of the formula: A-CH.sub.2 -Z with a compound of the formula: A'-H [wherein R is hydrogen or lower alkanoyl; R.sub.1 is hydrogen, halogen, lower alkyl, lower alkoxy or trifluoromethyl; W is oxygen, sulfur, sulfinyl or sulfonyl; Y is a group of either one of the formulae: ##SPC2##(wherein R.sub.2 is hydrogen, halogen, lower alkyl or lower alkoxy and R.sub.3 is hydrogen, halogen, lower alkyl, lower alkoxy or trifluoromethyl); A and A' are each a group of either one of the formulae: ##SPC3##(wherein R.sub.1, W and Y are each as defined above), provided that A and A' are different each other; and Z is a group of either one of the formulae: ##EQU1## (wherein X is halogen, alkylsulfonyloxy or arylsulfonyloxy and R is as defined above)].
    Type: Grant
    Filed: June 18, 1973
    Date of Patent: April 20, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isamu Maruyama, Masaru Nakao, Kikuo Sasajima, Shigeho Inaba, Hisao Yamamoto