Patents by Inventor Mitsuo Masaki
Mitsuo Masaki 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: 5852006Abstract: Disclosed are new alkylenediamine derivatives of the following formula which are effective for treatment of dysuria are disclosed: ##STR1## wherein R.sup.1 is hydrogen, alkyl, or a substituted or unsubstituted phenyl, naphthyl or aromatic heterocyclic group; R.sup.2 is a substituted or unsubstituted phenyl, naphthyl or aromatic heterocyclic group; R.sup.3 and R.sup.4 represent hydrogen, alkyl, aralkyl or aryl; or R.sup.3 and R.sup.4 are combined to form one of substituted or unsubstituted 5- to 7-membered heterocyclic groups; X is oxygen, sulfur or imino; Y is oxygen or sulfur; Z is --CH.sub.2 --, --CO-- or --CS--; m is an integer of 0-4; n is an integer of 0-4; r is 0 or 1; and p and q represent an integer of 0-5 provided that p plus q is 1-5.Type: GrantFiled: October 4, 1996Date of Patent: December 22, 1998Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Norihisa Miyake, Atsushi Tendo, Hiromitsu Takeda, Michiko Ishida, Haruhiko Shinozaki
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Patent number: 5843992Abstract: An epoxysuccinic acid derivative having the following formula: ##STR1## ?wherein R.sup.1 is hydrogen, alkyl, aryl, or aralkyl; each of R.sup.2 and R.sup.3 independently is aryl, aralkyl or alkyl; X is --O-- or --NR.sup.4 --; and R.sup.4 is hydrogen, alkyl, or aralkyl! is useful for prevention and treatment of bone diseases such as osteoporosis, malignant hypercalcemia and Paget's syndrome, and further useful for treatment of osteoarthritis and rheumatoid arthritis which are accompanied by abnormal enhancement of cathepsin L activity, and furthermore useful as a medicine for treating diseases in which cathepsin B and L participate, such as muscular dystrophy and muscular atrophy.Type: GrantFiled: September 29, 1997Date of Patent: December 1, 1998Assignee: Nippon Chemiphar Co., Ltd.Inventors: Yutaka Nomura, Toshihiro Takahashi, Kaoru Hara, Yasushi Yoshino, Mitsuo Masaki
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Patent number: 5773437Abstract: The present invention relates to alkylenediamine derivatives which relieve urinating contraction and therefore are of value as active ingredients of therapeutic agents for treating dysuria.Type: GrantFiled: September 30, 1996Date of Patent: June 30, 1998Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Norihisa Miyake, Atsushi Tendo, Michiko Ishida, Haruhiko Shinozaki, Yutaka Nomura, Yasunori Goto
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Patent number: 5576341Abstract: 2-[[2-(N-Isobutyl-N-methyl)amino]benzylsulfinyl]benzimidazole is effective for treating or preventing Helicobacter infections by administration to patients suffering from the infection.Type: GrantFiled: April 18, 1994Date of Patent: November 19, 1996Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Tomio Yamakawa, Yutaka Nomura, Hitoshi Matsukura
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Patent number: 5574030Abstract: Disclosed are new alkylenediamine derivatives of the following formula which are effective for treatment of dysuria are disclosed: ##STR1## wherein R.sup.1 is hydrogen, alkyl, or a substituted or unsubstituted phenyl, naphthyl or aromatic heterocyclic group; R.sup.2 is a substituted or unsubstituted phenyl, naphthyl or aromatic heterocyclic group; R.sup.3 and R.sup.4 represent hydrogen, alkyl, aralkyl or aryl; or R.sup.3 and R.sup.4 are combined to form one of substituted or unsubstituted 5- to 7-membered heterocyclic groups; X is oxygen, sulfur or imino; Y is oxygen or sulfur; Z is --CH.sub.2 --, --CO-- or --CS--; m is an integer of 0-4; n is an integer of 0-4; r is 0 or 1; and p and q represent an integer of 0-5 provided that p plus q is 1-5.Type: GrantFiled: July 13, 1993Date of Patent: November 12, 1996Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Norihisa Miyake, Atsushi Tendo, Hiromitsu Takeda, Michiko Ishida, Haruhiko Shinozaki
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Patent number: 5523317Abstract: Disclosed is a method of reducing blood pressure which comprises administering to a patient an imidazole derivative of the formula: ##STR1## wherein: each of R.sup.1 and R.sup.2 is hydrogen, substituted or unsubstituted alkyl, alkoxyalkyl, cycloalkyl, aryl, aralkyl, or R.sup.1 and R.sup.2 are combined to form hetero ring; each of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 is hydrogen, halogen, substituted or unsubstituted alkoxy, substituted or unsubstituted alkyl, aryl, aryloxy, alkoxycarbonyl, nitro, amino, acyl, or R.sup.3 is combined with R.sup.2 to form heteroring; R.sup.7 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted arylcarbonyl, or S-containing heteroring; each of R.sup.8 and R.sup.9 is hydrogen, halogen, substituted or unsubstituted alkoxy, unsubstituted or substituted alkyl, alkoxycarbonyl, aralkyl, nitro, amino, acyl, substituted or unsubstituted aryl, or R.sup.8 and R.sup.9 are combined to from alkylene; and n is 0 or 1.Type: GrantFiled: January 26, 1994Date of Patent: June 4, 1996Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Fumiyo Hara, Toshiro Kamishiro
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Patent number: 5446146Abstract: A therapeutic agent for liver disease containing as an active ingredient a piperazine derivative having the formula: ##STR1## wherein, A represents a phenyl, p-benzoquinonyl or cumarinyl group which may have at least one substituent selected from the group consisting of halogen, alkyl, fluoroalkyl, formyl, alkoxycarbonyl, acyl, hydroxy, alkoxy, acyloxy, glycosyloxy, amino, alkylamino, mercapto, alkylthio and nitro; B represents a single bond or a straight chain alkylene group containing 1-4 carbon atoms which may have at least one substituent selected from the group consisting of alkyl, aryl, aralkyl, hydroxy and oxo; R represents an atom or a group selected from the group consisting of hydrogen, alkali metal, alkaline earth metal, alkyl, cycloalkyl, aralkyl and aryl; and n is 2 or 8, or its pharmaceutically acceptable salt is diclosed.Type: GrantFiled: June 7, 1994Date of Patent: August 29, 1995Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Tomio Yamakawa, Masaru Satoh, Hiromitsu Takeda, Yasushi Yoshino, Hitoshi Matsukura
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Patent number: 5349050Abstract: Disclosed is a novel peptide having one of the formulae: ##STR1## (A and B are the amino acids: wherein if A is D- or L-Pro, B is Hat or Cit;if A is D-Pro, B is D-Arg, andif B is D- or L-Arg, A is Sat, Pip, Aze or Arg)Asn-A-L- (D-)Pro-Arg- (Gly)n (A is Set, Thr or Ala, n is 1 or 0)A-Ser-Pip-Arg (A is Pro-Asn-, Asn- or Pro-) ##STR2## (A is cyclopentylcarbonyl, Pro or pGlu; B is Gly or .beta.-Ala, W is a hydrogen atom or a group having the formula:or a peptide having the formula: ##STR3## wherein A and B have the same meanings as mentioned above, respectively pGlu-Asn-Ser-A-B-(Gly)n (A is Aze, D- or L-Pro, Pip or Sat, B is D- or L-Arg, Cit, Hat, Lys or Orn, n is 1 or 0) andPro- (Ash)m-Set-L- (D-)Pro-Arg- (Gly) n (m and n are independently 0 or 1)their functional derivatives, and pharmaceutically acceptable salts thereof.Type: GrantFiled: February 18, 1992Date of Patent: September 20, 1994Assignees: Nippon Chemiphar Co., Ltd., Fujirebio Kabushiki KaishaInventors: Mitsuo Masaki, Masaki Uehara, Kenji Hirate, Yoshikazu Isowa, Yoshiaki Sato, Yoshiharu Nakashima
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Patent number: 5312811Abstract: A novel peptide derivative having the formula: ##STR1## wherein A between Pro and Q.sup.2 is Arg or Lys: Q.sup.1 is pGlu or H; Q.sup.2 is --Gly--OH or OH; Y.sup.1 is H or --CO--T and Y.sup.2 is OH or T; wherein T is a thiamine derivative group is disclosed. The peptide derivative shows a remarkable nootropic effect.Type: GrantFiled: August 14, 1989Date of Patent: May 17, 1994Assignees: Nippon Chemiphar Co., Ltd., Fujirebio Kabushiki KaishaInventors: Mitsuo Masaki, Seiji Kondo, Norihisa Miyake, Masaki Uehara, Kenji Hirate, Yoshikazu Isowa, Yoshiaki Sato, Yoshiharu Nakashima
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Patent number: 5310902Abstract: Novel alkylenediamine derivatives effectively employable glutamate blockers have the formula (I) or (II): ##STR1## wherein each of R.sup.1 and R.sup.6 is an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, an aryl group, or an aralkyl group; each of R.sup.2 and R.sup.7 is an aliphatic hydrocarbon group, an alkoxy group, an aliphatic hydrocarbon group containing an ester bonding, an aliphatic hydrocarbon group containing an ether bonding, or an aryloxy group; each of R.sup.3, R.sup.4, R.sup.5 R.sup.8, R.sup.9 and R.sup.10 is hydrogen, an alkyl group, an alkoxy group, an acyloxy group, an aryl group, an aralkyl group, hydroxyl, a hydroxylalkyl group, halogen, nitrile, nitro, amino, carbamoyl or alkoxycarbonyl; and each of m and n is an integer of 0-3 (m+n does not exceed 3); k is an integer of 1-4; each of p and i is an integer of 2-13; and each of q and j is an integer of 4-7.Type: GrantFiled: August 7, 1991Date of Patent: May 10, 1994Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Masaru Satoh, Naoya Moritoh, Koichi Hashimoto, Toshiro Kamishiro, Haruhiko Shinozaki
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Patent number: 5250546Abstract: Amino-alcohol derivatives of the formula, ##STR1## where R.sub.1 is a straight or branched alkyl group having 3 to 8 carbon atoms, R.sub.2 and R.sub.3 are each a lower alkyl group, or R.sub.2 and R.sub.3 form a 5- to 7-membered ring together with the adjacent nitrogen atom which may have an oxygen atom attached thereto, R.sub.4 is a hydrogen atom or a lower alkyl group, R.sub.5 is a hydrogen atom or a lower alkyl group, X is a hydrogen or halogen atom or a lower alkyl or lower alkoxy group, and n is an integer of 2 or 3, and acid addition salts thereof, are effectively useful as medicines and agricultural chemicals. Processes are also disclosed for preparing such compounds.Type: GrantFiled: July 11, 1990Date of Patent: October 5, 1993Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Haruhiko Shinozaki, Masaru Satoh, Naoya Moritoh, Koichi Hashimoto, Toshiro Kamishiro
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Patent number: 5183811Abstract: A novel glycerol derivative which is effective to reduce blood pressure has the formula: ##STR1## wherein R.sup.1 is an alkyl group having 10-22 carbon atoms, R.sup.2 is lower acyl, benzoyl, aryl, mono-, di- or triarylalkyl, alkyl, cycloalkyl, or cycloalkylalkyl; Q is substituted or unsubstituted alkylene containing 1-4 carbon atoms, l is 0 or 1; Y is a nitrogen-containing heterocyclic group or a nitrogen-containing bridged heterocyclic group (--(Q).sub.l -- is attached to a carbon atom contained in a hetero-ring of the heterocyclic group) in which Y is the bridged heterocyclic group where l is 0; and each of R.sup.5, R.sup.6 and R.sup.7 is hydrogen, lower alkyl, aryl or aralkyl.Type: GrantFiled: July 19, 1990Date of Patent: February 2, 1993Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Hiromitsu Takeda, Toshiro Kamishiro, Masao Yamamoto
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Patent number: 5180712Abstract: A peptide having one of the following formulae (I), (II), (III) and (IV): ##STR1## or its functional derivatives, and a pharmaceutically acceptable salt thereof are disclosed. These peptides have a nootropic effect and are effective as antidementia agents.Type: GrantFiled: August 14, 1989Date of Patent: January 19, 1993Assignees: Fujirebio Kabushiki Kaisha, Nippon Chemiphar Co., Ltd.Inventors: Yoshikazu Isowa, Yoshiaki Sato, Yoshiharu Nakashima, Mitsuo Masaki, Norihisa Miyake, Masaki Uehara, Kenji Hirate
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Patent number: 5180836Abstract: Disclosed are novel imidazole derivatives having the formula: ##STR1## wherein R.sup.1 and R.sup.2 are H, alkyl, cycloalkyl, aryl, aralkyl or halogen-substituted alkyl, or R.sup.1 and R.sup.2 are combined to form a heterocyclic ring; R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are H, halogen, alkoxy, aralkyloxy, alkyl, alkoxycarbonyl, nitro, amino, acyl, fluorine substituted-alkyl, or fluorine substituted-alkoxy, or R.sup.3 is combined with R.sup.2 to form a heterocyclic ring; R.sup.8 and R.sup.9 are H, halogen, alkoxy, alkyl, alkoxycarbonyl, nitro, amino, acyl, fluorine substituted-alkyl, fluorine substituted-alkoxy, or aryl group which may have a substituent, or R.sup.8 and R.sup.9 are combined to form an alicyclic ring; R.sup.7 is, where R.sup.8 and R.sup.9 are not combined, H, and, where R.sup.8 and R.sup.9 are combined, H, alkyl which may have a substituent, aryl which may have a substituent, arylcarbonyl which may have a substituent, or a sulfur-containing heterocyclic group; and n is 0 or 1.Type: GrantFiled: November 1, 1991Date of Patent: January 19, 1993Assignee: Nippon Chemiphar Co., Ltd.Inventors: Susumu Okabe, Mitsuo Masaki, Tomio Yamakawa, Hitoshi Matsukura, Yutaka Nomura
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Patent number: 5112947Abstract: Disclosed is a novel peptide having one of the formulae: ##STR1## (A and B are the amino acids: wherein if A is D- or L-Pro, B is Har or Cit;if A is D-Pro, B is D-Arg, andif B is D- or L-Arg, A is Sar, Pip, Aze or Arg)Asn-A-L-(D-)Pro-Arg-(Gly).sub.n(A is Ser, Thr or Ala, n is 1 or 0)A-Ser-Pip-Arg(A is Pro-Asn-, Asn- or Pro-) ##STR2## (A is cyclopentylcarbonyl, Pro or pGlu; B is Gly or .beta.-Ala, W is a hydrogen atom or a group having the formula: or a peptide having the formula: ##STR3## wherein A and B have the same meanings as mentioned above, respectivelypGlu-Asn-Ser-A-B-(Gly).sub.n(A is Aze, D- or L-Pro, Pip or Sar, B is D- or L-Arg, Cit, Har, Lys or Orn, n is 1 or 0) andPro-(Asn).sub.m -Ser-L-(D-)Pro-Arg-(Gly).sub.n(m and n are independently 0 or 1)their functional derivatives, and pharmaceutically acceptable salts thereof.Type: GrantFiled: April 16, 1990Date of Patent: May 12, 1992Assignees: Nippon Chemiphar Co., Ltd., Fujirebio Kabushiki KaishaInventors: Mitsuo Masaki, Masaki Uehara, Kenji Hirate, Yoshikazu Isowa, Yoshiaki Sato, Yoshiharu Nakashima
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Patent number: 5091403Abstract: Disclosed are novel imidazole derivatives having the formula: ##STR1## wherein R.sup.1 is hydrogen or an alkyl group having 1-6 carbon atoms, R.sup.2 is an alkyl group having 2-6 carbon atoms substituted with an alkoxy group having 1-4 carbon atoms, each of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently is hydrogen, a halogen, an alkyl group having 1-6 carbon atoms, an alkoxy group having 1-6 carbon atoms, a fluorine-substituted alkyl group having 1-6 carbon atoms, or a fluorine-substituted alkoxy group having 1-6 carbon atoms. The new imidazole derivatives are effective particularly as anti-ulcer agents.Type: GrantFiled: August 10, 1990Date of Patent: February 25, 1992Assignee: Nippon Chemiphar Co., Ltd.Inventors: Susumu Okabe, Mitsuo Masaki, Tomio Yamakawa, Hitoshi Matsukura, Yutaka Nomura
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Patent number: 5082943Abstract: Disclosed are novel imidazole derivatives having the formula: ##STR1## wherein R.sup.1 and R.sup.2 are H, alkyl, cycloalkyl, aryl, aralkyl or halogen-substituted alkyl, or R.sup.1 and R.sup.2 are combined to form a heterocyclic ring; R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are H, halogen, alkoxy, aralkyloxy, alkyl, alkoxycarbonyl, nitro, amino, acyl, fluorine substituted-alkyl, or fluorine substituted-alkoxy, or R.sup.3 is combined with R.sup.2 to form a heterocyclic ring; R.sup.8 and R.sup.9 are H, halogen, alkoxy, alkyl, alkoxycarbonyl, nitro, amino, acyl, fluorine substituted-alkyl, fluorine substituted-alkoxy, or aryl group which may have a substituent, or R.sup.8 and R.sup.9 are combined to form an alicyclic ring; R.sup.7 is, where R.sup.8 and R.sup.9 are not combined, H, and, where R.sup.8 and R.sup.9 are combined, H, alkyl which may have a substituent, aryl which may have a substituent, arylcarbonyl which may have a substituent, or a sulfur-containing heterocyclic group; and n is 0 or 1.Type: GrantFiled: February 20, 1991Date of Patent: January 21, 1992Assignee: Nippon Chemiphar Co., Ltd.Inventors: Susumu Okabe, Mitsuo Masaki, Tomio Yamakawa, Hitoshi Matsukura, Yutaka Nomura
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Patent number: 5070089Abstract: A therapeutic agent for liver disease containing as an active ingredient a piperazine derivative having the formula: ##STR1## wherein, A represents a phenyl, p-benzoquinonyl or cumarinyl group which may have at least one substituent selected from the group consisting of halogen, alkyl, fluoroalkyl, formyl, alkoxycarbonyl, acyl, hydroxy, alkoxy, acyloxy, glycosyloxy, amino, alkylamino, mercapto, alkylthio and nitro; B represents a single bond or a straight chain alkylene group containing 1-4 carbon atoms which may have at least one substituent selected from the group consisting of alkyl, aryl, aralkyl, hydroxy and oxo; R represents an atom or a group selected from the group consisting of hydrogen, alkali metal, alkaline earth metal, alkyl, cycloalkyl, aralkyl and aryl; and n is 2 or 3, or its pharmaceutically acceptable salt is disclosed.Type: GrantFiled: January 26, 1989Date of Patent: December 3, 1991Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Tomio Yamakawa, Masaru Satoh, Hiromitsu Takeda, Yasushi Yoshino, Hitoshi Matsukura
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Patent number: 5070196Abstract: Novel alkylenediamine derivatives effectively employable as glutamate blockers have the formula (I) or (II): ##STR1## wherein each of R.sup.1 and R.sup.6 is an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, an aryl group, or an aralkyl group; each of R.sup.2 and R.sup.7 is an aliphatic hydrocarbon group, an alkoxy group, an aliphatic hydrocarbon group containing an ester bonding, an aliphatic hydrocarbon group containing an ether bonding, or an aryloxy group; each of R.sup.3, R.sup.4, R.sup.5, R.sup.8, R.sup.9 and R.sup.10 is hydrogen, an alkyl group, an alkoxy group, an acyloxy group, an aryl group, an aralkyl group, hydroxyl, a hydroxylalkyl group, halogen, nitrile, nitro, amino, carbamoyl or alkoxycarbonyl; and each of m and n is an integer of 0-3 (m+n does not exceed 3); k is an integer of 1-4; each of p and i is an integer of 2-13; and each of q and j is an integer of 4-7.Type: GrantFiled: August 1, 1990Date of Patent: December 3, 1991Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Masaru Satoh, Naoya Moritoh, Koichi Hashimoto, Toshiro Kamishiro, Haruhiko Shinozaki
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Patent number: 5053402Abstract: A glycerol derivative which is effective to reduce blood pressure and has the formula: ##STR1## wherein R.sup.1 is an alkyl group having 10-22 carbon atoms, R.sup.2 is a lower acyl group or benzoyl, each of R.sup.3 and R.sup.4 independently is hydrogen or a straight or branched chain alkyl group having 1-6 carbon atoms; each of R.sup.5, R.sup.6 and R.sup.7 independently is hydrogen, a straight or branched chain alkyl group having 1-6 carbon atoms, an aryl group or an aralkyl group; and each of m and n independently is 0 or a positive integer under the condition of m+n=2-8.Type: GrantFiled: November 22, 1989Date of Patent: October 1, 1991Assignee: Nippon Chemiphar Co., Ltd.Inventors: Mitsuo Masaki, Hiromitsu Takeda, Toshiro Kamishiro, Masao Yamamoto