Patents by Inventor Masao Shiozaki
Masao Shiozaki 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: 9493497Abstract: The invention provides a compound effective as an antitumor active agent or vaccine adjuvant and an intermediate useful for the synthesis of the compound, as well as production methods thereof, and a medicament containing the novel compound. The compound is a carbamate glycolipid represented by the formula (I) wherein each symbol is as defined herein. The invention also provides a dendritic cell pulsed with the glycolipid.Type: GrantFiled: April 26, 2013Date of Patent: November 15, 2016Assignee: RIKENInventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Masaru Taniguchi, Hiroshi Watarai
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Patent number: 9464105Abstract: The invention provides a compound represented by the formula (I) wherein R1 is a hydrogen atom or a hydroxyl group; two R2 are the same or different and each is a hydrogen atom or a hydroxyl group; R3 is a hydrocarbon group having 8-14 carbon atoms, which optionally has substituent(s); and R4 is a hydrocarbon group having 18-24 carbon atoms, which optionally has substituent(s), or a salt thereof. The invention also provides a method of treating an autoimmune disease or suppressing immunity by administering the aforementioned compound or a salt thereof to a patient in need thereof.Type: GrantFiled: August 2, 2013Date of Patent: October 11, 2016Assignee: RIKENInventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Tomokuni Shigeura, Hiroshi Watarai, Masaru Taniguchi
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Publication number: 20150218199Abstract: The invention provides a compound represented by the formula (I) wherein R1 is a hydrogen atom or a hydroxyl group; two R2 are the same or different and each is a hydrogen atom or a hydroxyl group; R3 is a hydrocarbon group having 8-14 carbon atoms, which optionally has substituent(s); and R4 is a hydrocarbon group having 18-24 carbon atoms, which optionally has substituent(s), or a salt thereof. The invention also provides a method of treating an autoimmune disease or suppressing immunity by administering the aforementioned compound or a salt thereof to a patient in need thereof.Type: ApplicationFiled: August 2, 2013Publication date: August 6, 2015Inventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Tomokuni Shigeura, Hiroshi Watarai, Masaru Taniguchi
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Publication number: 20150152128Abstract: The invention provides a compound effective as an antitumor active agent or vaccine adjuvant and an intermediate useful for the synthesis of the compound, as well as production methods thereof, and a medicament containing the novel compound. The compound is a carbamate glycolipid represented by the formula (I) wherein each symbol is as defined herein. The invention also provides a dendritic cell pulsed with the glycolipid.Type: ApplicationFiled: April 26, 2013Publication date: June 4, 2015Inventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Masaru Taniguchi., Hiroshi Watarai
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Patent number: 8853173Abstract: A compound represented by the following formula (1): wherein R1 is an aldopyranose residue wherein the 6-hydroxyl group is optionally alkylated, R2 is a C1-26 hydrocarbon group optionally having substituent(s), R3 is a hydrogen atom or a C1-26 hydrocarbon group optionally having substituent(s), R4 is a C1-21 hydrocarbon group optionally having substituent(s), X is an oxygen atom or —CH2—, and Y is —CH2—, —CH(OH)— or —CH?CH—, or a salt thereof is useful for the prophylaxis or treatment of cancer or infection, since it can preferentially induce production of IFN-? of NKT cells.Type: GrantFiled: February 4, 2011Date of Patent: October 7, 2014Assignee: RIKENInventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Masaru Taniguchi, Hiroshi Watarai
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Patent number: 8580751Abstract: The invention provides esterified ?-galactosylceramides effective for cancer treatment and the like, and a medicament containing same. In particular, the invention relates to a compound represented by the formula (I): wherein R1 is a hydrocarbon group having a carbon number of 1 to 30, R2 is a hydrocarbon group having a carbon number of 1 to 20, R3 is a hydrogen atom or hydrocarbon group having a carbon number of 1 to 5, R4 and R5 are the same or different and each is a hydrogen atom or a hydrocarbon group having a carbon number of 1 to 5, or R4 and R5 in combination form a divalent hydrocarbon group having a carbon number of 1 to 5, and optionally form a ring structure together with the adjacent ethylenedioxy, or a salt thereof.Type: GrantFiled: September 11, 2009Date of Patent: November 12, 2013Assignee: RikenInventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Ryusuke Nakagawa, Hiroshi Watarai, Masaru Taniguchi
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Patent number: 8551959Abstract: The invention provides a glycolipid effective for cancer treatment and the like and a synthetic intermediate therefor, as well as a medicament containing the glycolipid and the like.Type: GrantFiled: March 25, 2009Date of Patent: October 8, 2013Assignee: RIKENInventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Ryusuke Nakagawa, Masaru Taniguchi, Hiroshi Watarai
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Publication number: 20130005669Abstract: A compound represented by the following formula (1): wherein R1 is an aldopyranose residue wherein the 6-hydroxyl group is optionally alkylated, R2 is a C1-26 hydrocarbon group optionally having substituent(s), R3 is a hydrogen atom or a C1-26 hydrocarbon group optionally having substituent(s), R4 is a C1-21 hydrocarbon group optionally having substituent(s), X is an oxygen atom or —CH2—, and Y is —CH2—, —CH(OH)— or —CH?CH—, or a salt thereof is useful for the prophylaxis or treatment of cancer or infection, since it can preferentially induce production of IFN-? of NKT cells.Type: ApplicationFiled: February 4, 2011Publication date: January 3, 2013Applicant: RIKENInventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Masaru Taniguchi, Hiroshi Watarai
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Publication number: 20110224158Abstract: The invention provides esterified ?-galactosylceramides effective for cancer treatment and the like, and a medicament containing same. In particular, the invention relates to a compound represented by the formula (I): wherein R1 is a hydrocarbon group having a carbon number of 1 to 30, R2 is a hydrocarbon group having a carbon number of 1 to 20, R3 is a hydrogen atom or hydrocarbon group having a carbon number of 1 to 5, R4 and R5 are the same or different and each is a hydrogen atom or a hydrocarbon group having a carbon number of 1 to 5, or R4 and R5 in combination form a divalent hydrocarbon group having a carbon number of 1 to 5, and optionally form a ring structure together with the adjacent ethylenedioxy, or a salt thereof.Type: ApplicationFiled: September 11, 2009Publication date: September 15, 2011Applicant: RIKENInventors: Masao Shiozaki, Takuya Tashiro, Kenji Mori, Ryusuke Nakagawa, Hiroshi Watarai, Masaru Taniguchi
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Publication number: 20110104188Abstract: The invention provides a glycolipid effective for cancer treatment and the like and a synthetic intermediate therefor, as well as a medicament containing the glycolipid and the like.Type: ApplicationFiled: March 25, 2009Publication date: May 5, 2011Applicant: RIKENInventors: Takuya Tashiro, Kenji Mori, Masao Shiozaki, Ryusuke Nakagawa, Masaru Taniguchi, Hiroshi Watarai
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Publication number: 20090062214Abstract: A compound having excellent macrophage activity inhibitory action, which is represented by the general following formula: wherein Q represents an oxygen atom, a C1-C3 alkylene group, a —O-Alk- group or a —O-Alk-O— group (in which Alk is a C1-C3 alkylene group), R1 represents a C1-C20 alkanoyl group which may be substituted, a C3-C20 alkenoyl group which may be substituted or a C3-C20 alkynoyl group which may be substituted, R2, R3 and R4, which may be the same or different, represent a hydrogen atom, a C1-C20 alkyl group which may be substituted, a C2-C20 alkenyl group which may be substituted, a C2-C20 alkynyl group which may be substituted, a C1-C20 alkanoyl group which may be substituted, a C3-C20 alkenoyl group which may be substituted or a C3-C20 alkynoyl group which may be substituted, R5 represents a hydrogen atom, a halogen atom, a hydroxyl group, a C1-C6 alkoxy group which may be substituted, a C2-C6 alkenyloxy group which may be substituted or a C2-C6 alkynyloxy group which may be substitutedType: ApplicationFiled: January 7, 2005Publication date: March 5, 2009Inventors: Masao Shiozaki, Takaichi Shimozato
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Patent number: 6511965Abstract: A compound of formula (I) below, which exhibits excellent macrophage activity inhibitory action, is useful for the treatment or prophylaxis of inflammatory disorders, autoimmune diseases or septicemia. In a preferred embodiment, R1 and R3 each represents a C1-C20 alkanoyl group which may optionally be substituted with one or more substituent groups selected from substituent group A, R2 and R4 each represents a C1-C20 alkyl group which may optionally be substituted with one or more substituent groups selected from substituent group A, R5 is a hydrogen atom, a halogen atom, a hydroxy group, or a C1-C6 alkoxy group, and substituent group A is a halogen atom, a hydroxy group, an oxo group, a C1-C20 alkoxy group, or a C1-C20 alkanoyloxy group.Type: GrantFiled: August 9, 2001Date of Patent: January 28, 2003Assignee: Sankyo Company, LimitedInventors: Yukiko Kazama, Masao Shiozaki, Shinichi Kurakata, Saori Kanai
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Publication number: 20020161221Abstract: A compound of formula (I) below, which exhibits excellent macrophage activity inhibitory action, is useful for the treatment or prophylaxis of inflammatory disorders, autoimmune diseases or septicemia. In a preferred embodiment, R1 and R3 each represents a C1-C20 alkanoyl group which may optionally be substituted with one or more substituent groups selected from substituent group A, R2 and R4 each represents a C1-C20 alkyl group which may optionally be substituted with one or more substituent groups selected from substituent group A, R5 is a hydrogen atom, a halogen atom, a hydroxy group, or a C1-C6 alkoxy group, and substituent group A is a halogen atom, a hydroxy group, an oxo group, a C1-C20 alkoxy group, or a C1-C20 alkanoyloxy group.Type: ApplicationFiled: August 9, 2001Publication date: October 31, 2002Applicant: SANKYO COMPANY, LIMITEDInventors: Yukiko Kazama, Masao Shiozaki, Shinichi Kurakata, Saori Kanai
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Patent number: 5792840Abstract: Compounds of formula (I): ##STR1## in which: R.sup.1 is hydroxy, protected hydroxy, fluorine, or --OP(O)(OH).sub.2 ; R.sup.2 and R.sup.3 are independently optionally substituted C.sub.6 -C.sub.20 aliphatic acyl; R.sup.4 is hydroxy, protected hydroxy, or --OP(O)(OH).sub.2, where at least one of R.sup.1 and R.sup.4 is --OP(O)(OH).sub.2 ; and R.sup.5 is hydroxy, protected hydroxy, or fluorine; provided that, except where at least one of R.sup.1 and R.sup.5 is fluorine, then at least one of R.sup.2 and R.sup.3 is a substituted C.sub.6 -C.sub.20 aliphatic acyl having (i) at least one halogen substituent and (ii) at least one substituent selected from the group consisting of halogen, hydroxy and C.sub.6 -C.sub.20 aliphatic acyloxy or at least one of R.sup.2 and R.sup.3 is a substituted C.sub.6 -C.sub.20 aliphatic acyl which is substituted by at least one halogen-substituted C.sub.6 -C.sub.Type: GrantFiled: July 26, 1994Date of Patent: August 11, 1998Assignee: Sankyo Company, LimitedInventors: Masao Shiozaki, Noboru Ishida, Masami Arai, Tetsuo Hiraoka, Tomowo Kobayashi, Yuzuru Akamatsu, Masahiro Nishijima