Patents by Inventor Keiji Hemmi
Keiji Hemmi 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: 5142048Abstract: The invention relates to novel intermediate compounds for preparation of novel amino acid derivatives having renin inhibiting activity.Type: GrantFiled: January 8, 1990Date of Patent: August 25, 1992Assignee: Fujisawa Pharmaceutical Company, Ltd.Inventors: Keiji Hemmi, Masahiro Neya, Hiroshi Marusawa, Keisuke Imai, Natsuko Kayakiri, Masashi Hashimoto
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Patent number: 5057513Abstract: The invention relates to thiazepine derivatives, which are antagonists of platelet activating factor, of the formula: ##STR1## wherein R.sup.1 is ar(lower)alkyl which may have suitable substituent(s),R.sup.2 is hydrogen, lower alkyl which may have suitable substituent(s), or a group of the formula: ##STR2## in which A is lower alkylene and X is halogen, n is 0, 1 or 2 and Y is --CH.sub.2 --CH.sub.2 -- or ##STR3## or a pharmaceutically acceptable salt thereof.Type: GrantFiled: May 4, 1990Date of Patent: October 15, 1991Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Keiji Hemmi, Ichiro Shima, Naoki Fukami, Masashi Hashimoto
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Patent number: 4963530Abstract: A compound of the formula: ##STR1## wherein R.sup.1 is aryl optionally substituted with a substituent selected from the group consisting of halogen and halo(lower)alkyl; lower alkyl or cyclo(lower)alkyl; andR.sup.2 is hydrogen or lower alkyl, orR.sup.1 and R.sup.2 are taken together with the attached nitrogen atom to form a heterocyclic group optionally substituted with a substituent selected from the group consisting of lower alkyl and esterified carboxy,R.sup.3 is hydrogen or lower alkyl, andR.sup.4 is lower alkyl,and its pharmaceutically acceptable salt, a process for the preparation thereof and pharmaceutical composition comprising the same.Type: GrantFiled: March 21, 1988Date of Patent: October 16, 1990Assignee: Fujisawa Pharmaceutical Company, Ltd.Inventors: Keiji Hemmi, Masahiro Neya, Keisuke Imai, Natsuko Kayakiri, Masashi Hashimoto
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Patent number: 4940709Abstract: Diseases caused by platelet activating factor are prevented and treated by administration to a subject of a therapeutically effective amount of a piperazine compound of the formula: ##STR1## wherein R.sup.1 to R.sup.4 are as defined in the specification.Type: GrantFiled: November 20, 1987Date of Patent: July 10, 1990Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Norihiko Shimazaki, Keiji Hemmi, Osamu Nakaguti, Yoshio Miyazaki, Masashi Hashimoto
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Patent number: 4921855Abstract: A compound of the formula: ##STR1## wherein R.sup.1 is lower alkyl optionally substituted with a substituent selected from the group consisting of acyl, hydroxy, lower alkoxy, aryl, lower alkylthio and a group of the formula: ##STR2## in which R.sup.5 is hydrogen or acyl and R.sup.6 is hydrogen or lower alkyl; aryl; or amino optionally substituted with substituent(s) selected from the group consisting of lower alkyl and acyl; andR.sup.2 is hydrogen or lower alkyl; orR.sup.1 and R.sup.2 are taken together with the attached nitrogen atom to form a heterocyclic group optionally substituted with substituent(s) selected from the group consisting of lower alkyl, hydroxy(lower )alkyl, lower alkoxy(lower)alkyl, acyl(lower)alkyl, oxo and acyl;R.sup.3 is hydrogen or lower alkyl; andR.sup.4 is lower alkyl;and its pharmaceutically acceptable salt, processes for the preparation thereof and pharmaceutical composition comprising the same.Type: GrantFiled: June 9, 1988Date of Patent: May 1, 1990Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Keiji Hemmi, Masahiro Neya, Hiroshi Marusawa, Keisuke Imai, Natsuko Kayakiri, Masashi Hashimoto
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Patent number: 4806538Abstract: The invention relates to a PAF-antagonist pharmaceutical composition comprising a compound of the formula: ##STR1## wherein R.sup.1 is pyridyl(lower)alkyl or thiazolyl(lower)alkyl,R.sup.2 is N-lower alkylindolyl(lower)alkyl which may have lower alkyl or halogen on the indole ring, andR.sup.3 and R.sup.4 are each hydrogen or lower alkyl; or pharmaceutically acceptable salt thereof.Type: GrantFiled: March 30, 1987Date of Patent: February 21, 1989Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Norihiko Shimazaki, Keiji Hemmi, Osamu Nakaguti, Yoshio Miyazaki, Masashi Hashimoto
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Patent number: 4801580Abstract: The invention relates to novel peptides, of pharmacological activity, of the formula: ##STR1## wherein R.sup.1 is hydrogen,R.sub.b.sup.1 is methyl,R.sup.2 is carboxy, carboxymethylcarbamoyl, 1-carboxyethylcarbamoyl or ethoxycarbonylmethylcarbamoyl,R.sup.q is carboxy or 3-t-butoxycarbonylcarbazoyl,R.sup.p is carboxy or methoxycarbonyl,R.sup.r is hydrogen, t-butoxycarbonyl or benzyloxycarbonyl,m is the integer 2, andn is the integer 1, or its pharmaceutically acceptable salt.Type: GrantFiled: May 13, 1982Date of Patent: January 31, 1989Assignee: Fujisawa Pharmaceutical Company, Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Hidekazu Takeno, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto, Yoshio Kuroda, Eiko Iguchi, Masanobu Kohsaka, Hatsuo Aoki, Hiroshi Imanaka
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Patent number: 4749691Abstract: The invention relates to novel peptides of enhanced pharmacological activity of the formula: ##STR1## wherein R.sup.1 is hydroxyalkanoyl,R.sup.2 and R.sup.q are each hydrogen, carboxy, protected carboxy, or a group of the formula: ##STR2## wherein R.sub.a.sup.2 is mono- or di-carboxy (or protected carboxy) lower alkyl or ar(carboxy or protected carboxy) lower alkyl whose aryl moiety may be substituted by hydroxy, R.sup. 2 is hydrogen or lower alkyl; R.sup.p is hydrogen, carboxy, protected carboxy, with proviso that when one of R.sup.2 and R.sup.q is hydrogen, then the other is carboxy or protected carboxy or a group of the formula: ##STR3## wherein R.sub.a.sup.2 and R.sub.b.sup.2 are each as defined above; R.sup.r is hydrogen or amino protective group; m is an integer 1 to 3;or its pharmaceutically acceptable salt.Type: GrantFiled: April 13, 1987Date of Patent: June 7, 1988Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Hidekazu Takeno, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto, Yoshio Kuroda, Eiko Iguchi, Masanobu Kohsaka, Hatsuo Aoki, Hiroshi Imanaka
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Patent number: 4725582Abstract: The invention concerns peptides, having the pharmaceutical property of enhancing the immune response, having the structure: ##STR1## wherein R.sup.1 is alkanoyl,R.sub.b.sup.1 is hydrogen, methyl, isopropyl, hydroxymethyl, protected hydroxymethyl or benzyl,R.sup.2 is hydrogen, carboxy, protected carboxy or a group of the formula: ##STR2## wherein R.sub.a.sup.2 is mono- or di-carboxy (or protected carboxy) lower alkyl or ar(carboxy or protected carboxy) lower alkyl whose aryl moiety is substituted by hydroxy or not substituted,R.sub.b.sup.2 is hydrogen or lower alkyl,R.sup.p is hydrogen, carboxy or protected carboxy,R.sup.q is carboxy, protected carboxy or a group of the formula ##STR3## wherein R.sub.a.sup.2 and R.sub.b.sup.2 are each as defined above, R.sup.r is hydrogen or amino protective group,m is an integer 1 to 3, andn is an integer 1.Type: GrantFiled: May 13, 1982Date of Patent: February 16, 1988Assignee: Fujisawa Pharmaceutical Company, Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Takeno Hidekazu, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto, Yoshio Kuroda, Eiko Iguchi, Masanobu Kohsaka, Hatsuo Aoki, Hiroshi Imanaka
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Patent number: 4666890Abstract: The invention relates to novel peptides of enhanced pharmacological activity of the formula: ##STR1## wherein R.sup.1 is alkanoyl;R.sup.2 and R.sup.q are each hydrogen, carboxy, protected carboxy, or a group of the formula: ##STR2## wherein R.sub.a.sup.2 is mono- or di-carboxy (or protected carboxy) lower alkyl or ar(carboxy or protected carboxy) lower alkyl whose aryl moiety may be substituted by hydroxy,R.sub.b.sup.2 is hydrogen or lower alkyl;R.sup.P is hydrogen, carboxy, protected carboxy, with proviso that when one of R.sup.2 and R.sup.q is hydrogen, then the other is carboxy or protected carboxy or a group of the formula: ##STR3## wherein R.sub.a.sup.2 and R.sub.b.sup.2 are each as defined above; R.sup.r is hydrogen or amino protective group;m is an integer 1 to 3;or its pharmaceutically acceptable salt.Type: GrantFiled: May 20, 1982Date of Patent: May 19, 1987Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Hidekazu Takeno, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto, Yoshio Kuroda, Eiko Iguchi, Masanobu Kohsaka, Hatsuo Aoki, Hiroshi Imanaka
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Patent number: 4539155Abstract: The invention relates to compounds and salts of compounds which are diaminopimelyl peptides, N-acetoxypropionyl or N-t-butoxycarbonyl-amino-acid - (.alpha.-OBzl) glutamic acid peptides or N-acylated derivatives of (.alpha.-OBzl) glytamic acid or of (.alpha.-OBzl) aminoadipic acid.The compounds and their salts are starting materials for the preparation of pharmacologically active peptides.Type: GrantFiled: July 21, 1983Date of Patent: September 3, 1985Assignee: Fuisawa Pharmaceutical Company, Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Hidekazu Takeno, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto, Yoshio Kuroda, Eiko Iguchi, Masanobu Kohsaka, Hatsuo Aoki, Hiroshi Imanaka
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Patent number: 4512980Abstract: The invention relates to novel peptides of pharmacological activity, of the formula ##STR1## wherein R.sup.1 is hydrogen or acyl;R.sup.2 is carboxy or protected carboxy or a group of the formula: --COHN--R.sub.a.sup.2 wherein R.sub.a.sup.2 is carboxy (lower) alkyl or protected carboxy (lower) alkyl;R.sup.3 is carboxy, protected carboxy, lower alkyl, hydroxyphenyl, carbamoyl or a group of the formula: ##STR2## wherein R.sub.a.sup.3 is hydrogen, amino, protected amino or acylamino, R.sub.b.sup.3 is carboxy or protected carboxy;R.sup.p is carboxy, protected carboxy, carbamoyl, carboxy (lower) alkyl or protected carboxy (lower) alkyl;l is an integer 0;m is an interger 3; andn is an integer 1, provided that when R.sup.1 is hydrogen or acyl,R.sup.2 is carboxy, protected carboxy or a group of the formula:--CONHR.sub.a.sup.2 wherein R.sub.a.sup.2 is carboxy (lower) alkyl or protected carboxy (lower) alkyl,R.sup.p is carboxy, or protected carboxy,R.sup.Type: GrantFiled: July 28, 1982Date of Patent: April 23, 1985Assignee: Fujisawa Pharmaceutical Co. Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Hidekazu Takeno, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto
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Patent number: 4504584Abstract: The invention relates to a biologically pure culture of new strains of the microorganism Streptomyces which are capable upon fermentation of producing a peptide of pharmacological activity.Type: GrantFiled: May 19, 1982Date of Patent: March 12, 1985Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Hidekazu Takeno, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto, Yoshio Kuroda, Eiko Iguchi, Masanobu Kohsaka, Hatsuo Aoki, Hiroshi Imanaka
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Patent number: 4497729Abstract: This invention relates to novel peptides, of pharmacological activity, of the formula: ##STR1## wherein R.sup.1 is heptanoyl, stearoyl, 2-hydroxypropionyl or 2-acetoxypropionyl,R.sup.2 is hydrogen or methyl,R.sup.3 is carboxy, benzyloxycarbonyl or hydroxymethyl,R.sup.4 is hydrogen or methyl,R.sup.5 is carboxy or hydroxymethyl,R.sup.6 is carboxy, methoxycarbonyl, 3-t-butoxycarbonylcarbazoyl or hydroxymethyl,R.sup.7 is hydrogen, 3-t-butoxycarbonyl or benzyloxycarbonyl, andn is an integer 0 or 1, with the proviso that when each of R.sup.3 and R.sup.6 is not simultaneously hydroxymethyl, then R.sup.5 is hydroxymethyl.Type: GrantFiled: November 19, 1981Date of Patent: February 5, 1985Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Satoshi Yonishi, Hidekazu Takeno
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Patent number: 4497801Abstract: Peptides of the following formulae:H-THR-LYS-GLU-LYS-LEU-LYS-SER-GLU-LEU-VAL-ALA-ASN-OH, H-GLU-LEU-LYS-SER-GLU-LEU-VAL-ALA-ASN-OH, H-LYS-LEU-LYS-SER-GLU-OH,are effective in the treatment of bacteria viral infection.Type: GrantFiled: September 6, 1983Date of Patent: February 5, 1985Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Masashi Hashimoto, Keiji Hemmi, Daijiro Hagiwara
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Patent number: 4493794Abstract: The invention deals with novel peptides useful for the therapeutic treatment of infectious diseases caused by pathogenic microorganisms, having the structure: ##STR1## wherein R.sup.1 is hydrogen, substituted or unsubstituted alkanoyl, or substituted or unsubstituted aralkanoyl,R.sup.2 is carboxy or protected carboxy,R.sup.3 is carboxy, protected carboxy, carbamoyl, or carboxy or protected carboxy(lower)alkylcarbamoyl,R.sup.4 is carboxy, protected carboxy or carbamoyl, andR.sup.5 is hydrogen or an amino protective group, with proviso that at least one of R.sup.3 and R.sup.4 is always carbamoyl and their pharmaceutically acceptable salts.Type: GrantFiled: December 9, 1981Date of Patent: January 15, 1985Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Satoshi Yonishi, Hidekazu Takeno, Satoshi Okada, Masashi Hashimoto
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Patent number: 4487763Abstract: The invention relates to novel peptides and their pharmaceutically acceptable salts, particularly useful for pharmaceutical purposes such as in the therapeutic treatment of infectious diseases caused by pathogenic microorganisms. The compounds have the structure ##STR1## wherein R.sup.1 is hydrogen or acyl;R.sup.2 is carboxy or protected carboxy or a group of the formula: --COHN--R.sub.a.sup.2 wherein R.sub.a.sup.2 is carboxy (lower) alkyl or protected carboxy (lower) alkyl;R.sup.3 is carboxy, protected carboxy, lower alkyl, hydroxyphenyl, carbamoyl or a group of the formula: ##STR2## wherein R.sub.a.sup.3 is hydrogen, amino, protected amino or acylamino, R.sub.b.sup.3 is carboxy or protected carboxy,R.sup. is carboxy, protected carboxy, carbamoyl, carboxy (lower) alkyl or protected carboxy (lower) alkyl;l is an integer 2,m is an integer 0 to 2 andn is an integer 1, provided that, whenR.sup.1 is hydrogen or acyl,R.sup.2 is carboxy, protected carboxy or a group of the formula: --CONHR.sub.a.sup.2 wherein R.Type: GrantFiled: July 28, 1982Date of Patent: December 11, 1984Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Hidekazu Takeno, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto
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Patent number: 4476050Abstract: The invention deals with novel peptides useful in the therapeutic treatment of infectious diseases caused by pathogenic microorganisms having the structure: ##STR1## wherein, R.sup.1 is hydrogen or acyl,R.sup.2 is lower alkyl,R.sup.3 is carboxy or protected carboxy,R.sup.4 is hydrogen or lower alkyl,R.sup.5 is hydrogen, alkyl or ar(lower)alkyl,R.sup.6 is carboxy or protected carboxy, andR.sup.7 is hydrogen or an amino protective group,and their pharmaceutically acceptable salts.Type: GrantFiled: January 20, 1982Date of Patent: October 9, 1984Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Satoshi Yonishi, Hidekazu Takeno, Satoshi Okada, Masashi Hashimoto
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Patent number: 4472300Abstract: New antimicrobial azetidinone derivatives and their salt of the formula: ##STR1## wherein R.sub.1 amino or acylamino, and A is selected from a variety of groups.Type: GrantFiled: March 13, 1980Date of Patent: September 18, 1984Assignee: Fujisawa Pharmaceutical Co., Ltd.Inventors: Takashi Kamiya, Yoshihisa Saito, Masashi Hashimoto, Osamu Nakaguti, Teruo Oku, Youichi Shiokawa, Takao Takaya, Tadaaki Komori, Tsutomu Teraji, Keiji Hemmi, Hisashi Takasugi
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Patent number: RE32992Abstract: The invention deals with novel peptides useful for the therapeutic treatment of infectious diseases caused by pathogenic microorganisms. Included is the peptide FR900156 having the structure: ##STR1## as well as the peptides of the structure ##STR2## wherein R.sup.1 is acyl;R.sub.b.sup.1 is hydrogen, methyl, isopropyl, hydroxymethyl, protected hydroxymethyl or benzyl;R.sup.2 is hydrogen, carboxy, protected carboxy, or a group of the formula: ##STR3## wherein R.sub.a.sup.2 is mono- or di-carboxy lower alkyl or ar(carboxy) lower alkyl whose aryl moiety may be substituted by hydroxy,R.sub.b.sup.2 is hydrogen or lower alkyl;R.sup.p and R.sup.q are each hydrogen, carboxy, protected carboxy, with proviso that when one of R.sup.2 and R.sup.q is hydrogen, then the other is carboxy or protected carboxy;R.sup.r is hydrogen or amino protective group; m is an integer 1 to 3, and n is 1 .Iadd.provided that when R.sup.1 is benzyloxycarbonyl R.sub.5.sup.1 is methyl, m is an integer 2 and n is an integer 1, then R.sup.Type: GrantFiled: May 18, 1984Date of Patent: July 18, 1989Assignee: Fujisawa Pharaceutical Co., Ltd.Inventors: Yoshio Kuroda, Eiko Iguchi, Masanobu Kohsaka, Hatsuo Aoki, Hiroshi Imanaka, Yoshihiko Kitaura, Osamu Nakaguchi, Keiji Hemmi, Matsuhiko Aratani, Hidekazu Takeno, Satoshi Okada, Hirokazu Tanaka, Masashi Hashimoto