Patents by Inventor Akihiko Tsuruoka

Akihiko Tsuruoka 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).

  • Publication number: 20050187236
    Abstract: A compound represented by the general formula: wherein X1 represents a nitrogen atom or a group represented by the formula —CR10?; X2 represents a nitrogen atom or a group represented by the formula —CR11?; Y represents an oxygen atom or the like; R1 represents a C1-6 alkoxy group, an optionally substituted C6-10 aryloxy group, a group represented by the formula —NR12aR12b or the like; R2 represents a hydrogen atom, an optionally substituted C1-6 alkyl group, or the like; R3, R4, R5, R6, R7, R8, R10 and R11 each independently represent a hydrogen atom, a halogen atom, an optionally substituted C1-6 alkyl group, or the like; R9 represents a group represented by the formula —NR16aR16b or the like; and R12a, R12b, R16a and R16b each independently represent a hydrogen atom, an optionally substituted C1-6 alkyl group, or the like, a salt thereof, or a hydrate of the foregoing.
    Type: Application
    Filed: August 29, 2003
    Publication date: August 25, 2005
    Inventors: Akihiko Tsuruoka, Tomohiro Matsushima, Masayuki Matsukura, Kazuki Miyazaki, Keiko Takahashi, Junichi Kamata, Yoshio Fukuda
  • Publication number: 20050176712
    Abstract: The present invention provides an integrin expression inhibitor, and an agent for treating arterial sclerosis, psoriasis, cancer, retinal angiogenesis, diabetic retinopathy or inflammatory diseases, an anticoagulant, or a cancer metastasis suppressor on the basis of an integrin inhibitory action.
    Type: Application
    Filed: April 4, 2005
    Publication date: August 11, 2005
    Inventors: Toshiaki Wakabayashi, Yasuhiro Funahashi, Naoko Hata, Taro Semba, Yuji Yamamoto, Toru Haneda, Takashi Owa, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda
  • Publication number: 20040253205
    Abstract: It was discovered that a compound represented by the general formula (I) shows strong c-Kit kinase inhibitory activity, and it inhibits proliferation of c-Kit kinase activated-cancer cells in vitro and in vivo. A novel anticancer agent showing c-Kit kinase inhibitory activity was discovered.
    Type: Application
    Filed: March 10, 2004
    Publication date: December 16, 2004
    Inventors: Yuji Yamamoto, Tatsuo Watanabe, Masayuki Okada, Akihiko Tsuruoka
  • Patent number: 6787534
    Abstract: The present invention provides a sulfonamide- or sulfonylurea-containing heterocyclic compounds. Specifically, it provides a heterocyclic compound represented by the formula (I), a pharmacologically acceptable salt thereof or a hydrate of them.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: September 7, 2004
    Assignee: Eisai Co., Ltd.
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Naoko Tsukahara, Takashi Owa
  • Publication number: 20040053908
    Abstract: Compounds represented by the following general formula: 1
    Type: Application
    Filed: April 18, 2003
    Publication date: March 18, 2004
    Inventors: Yasuhiro Funahashi, Akihiko Tsuruoka, Masayuki Matsukura, Toru Haneda, Yoshio Fukuda, Junichi Kamata, Keiko Takahashi, Tomohiro Matsushima, Kazuki Miyazaki, Ken-ichi Nomoto, Tatsuo Watanabe, Hiroshi Obaishi, Atsumi Yamaguchi, Sachi Suzuki, Katsuji Nakamura, Fusayo Mimura, Yuji Yamamoto, Junji Matsui, Kenji Matsui, Takako Yoshiba, Yasuyuki Suzuki, Itaru Arimoto
  • Publication number: 20040018192
    Abstract: The present invention provides an integrin expression inhibitor, and an agent for treating arterial sclerosis, psoriasis, cancer, retinal angiogenesis, diabetic retinopathy or inflammatory diseases, an anticoagulant, or a cancer metastasis suppressor on the basis of an integrin inhibitory action. Namely, it provides an integrin expression inhibitor comprising, as an active ingredient, a sulfonamide compound represented by the following formula (I), a pharmacologically acceptable salt thereof or a hydrate of them.
    Type: Application
    Filed: July 18, 2002
    Publication date: January 29, 2004
    Inventors: Toshiaki Wakabayashi, Yasuhiro Funahashi, Naoko Hata, Taro Semba, Yuji Yamamoto, Toru Haneda, Takashi Owa, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda
  • Patent number: 6673787
    Abstract: The present invention creates a novel antiangiogenic agent and provides an antitumor agent which shows high safety as compared with conventional antitumor agents, has a sure effect and is able to be administered for a long period. That is, it provides an indole compound represented by the following formula (I), its pharmacologically acceptable salt or hydrates thereof. In the formula, R1 represents hydrogen atom, a halogen atom or cyano group; R2 and R3 are the same as or different from and each represents hydrogen atom, a C1-C4 lower alkyl group or a halogen atom; R4 represents hydrogen atom or a C1-C4 lower alkyl group; and the ring A represents cyanophenyl group, aminosulfonylphenyl group, aminopyridyl group, aminopyrimidyl group, a halopyridyl group or cyanothiophenyl group, provided that the case where all of R1, R2 and R3 are hydrogen atoms, where both R2 and R3 are hydrogen atoms or where the ring A is aminosulfonyl group and both R1 and R2 are halogen atoms is excluded.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: January 6, 2004
    Assignee: Eisai Co., Ltd.
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Takashi Owa, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Noako Tsukahara
  • Patent number: 6638964
    Abstract: The present invention creates a novel antiangiogenic agent and provides an antitumor agent which shows high safety as compared with conventional antitumor agents, has a sure effect and is able to be administered for a long period. That is, it provides an indole compound represented by the following formula (I), its pharmacologically acceptable salt or hydrates thereof: In the formula, R1 represents hydrogen atom, a halogen atom or cyano group; R2 and R3 are the same as or different from and each represents hydrogen atom, a C1˜C4 lower alkyl group or a halogen atom; R4 represents hydrogen atom or a C1˜C4 lower alkyl group; and the ring A represents cyanophenyl group, aminosulfonylphenyl group, aminopyridyl group, aminopyrimidyl group, a halopyridyl group or cyanothiophenyl group, provided that the case where all of R1, R2 and R3 are hydrogen atoms, where both R2 and R3 are hydrogen atoms or where the ring A is aminosulfonyl group and both R1 and R2 are halogen atoms is excluded.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: October 28, 2003
    Assignee: Eisai Co., Ltd.
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Takashi Owa, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Noako Tsukahara
  • Publication number: 20030144507
    Abstract: The present invention provides a sulfonamide- or sulfonylurea-containing heterocyclic compounds. Specifically, it provides a heterocyclic compound represented by the formula (I), a pharmacologically acceptable salt thereof or a hydrate of them.
    Type: Application
    Filed: June 10, 2002
    Publication date: July 31, 2003
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Naoko Tsukahara, Takashi Owa
  • Patent number: 6469043
    Abstract: The present invention creates a novel antiangiogenic agent and provides an antitumor agent which shows high safety as compared with conventional antitumor agents, has a sure effect and is able to be administered for a long period. That is, it provides an indole compound represented by the following formula (I), its pharmacologically acceptable salt or hydrates thereof. In the formula, R1 represents hydrogen atom, a halogen atom or cyano group; R2 and R3 are the same as or different from and each represents hydrogen atom, a C1˜C4 lower alkyl group or a halogen atom; R4 represents hydrogen atom or a C1˜C4 lower alkyl group; and the ring A represents cyanophenyl group, aminosulfonylphenyl group, aminopyridyl group, aminopyrimidyl group, a halopyridyl group or cyanothiophenyl group, provided that the case where all of R1, R2 and R3 are hydrogen atoms, where both R2 and R3 are hydrogen atoms or where the ring A is aminosulfonyl group and both R1 and R2 are halogen atoms is excluded.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: October 22, 2002
    Assignee: Eisai Co., Ltd.
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Takashi Owa, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Noako Tsukahara
  • Publication number: 20020128480
    Abstract: The present invention creates a novel antiangiogenic agent and provides an antitumor agent which shows high safety as compared with conventional antitumor agents, has a sure effect and is able to be administered for a long period. That is, it provides an indole compound represented by the following formula (I), its pharmacologically acceptable salt or hydrates thereof.
    Type: Application
    Filed: March 18, 2002
    Publication date: September 12, 2002
    Applicant: Eisai Co., Ltd.
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Takashi Owa, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Noako Tsukahara
  • Publication number: 20020128483
    Abstract: The present invention creates a novel antiangiogenic agent and provides an antitumor agent which shows high safety as compared with conventional antitumor agents, has a sure effect and is able to be administered for a long period. That is, it provides an indole compound represented by the following formula (I), its pharmacologically acceptable salt or hydrates thereof.
    Type: Application
    Filed: March 18, 2002
    Publication date: September 12, 2002
    Applicant: Eisai Co., Ltd.
    Inventors: Toru Haneda, Akihiko Tsuruoka, Junichi Kamata, Tadashi Okabe, Keiko Takahashi, Kazumasa Nara, Shinichi Hamaoka, Norihiro Ueda, Takashi Owa, Toshiaki Wakabayashi, Yasuhiro Funahashi, Taro Semba, Naoko Hata, Yuji Yamamoto, Yoichi Ozawa, Noako Tsukahara
  • Patent number: 5792781
    Abstract: A compound represented by the general formula: ##STR1## wherein R.sup.1 and R.sup.2 denote a halogen atom or hydrogen atom; R.sup.3 means a hydrogen atom or lower alkyl group; l, r and m stand for 0 or 1; A is N or CH; W denotes an aromatic ring or a condensed ring thereof; X means another aromatic ring, an alkanediyl group, an alkenediyl group, or an alkynediyl group; Y stand for --S--, etc.; Z denotes a hydrogen atom, etc., or a salt thereof, and intermediates thereof or a salt thereof as well as processes for the preparation thereof, and pharmaceutical composition suitable for use as an antifungal agent.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: August 11, 1998
    Assignee: Eisai Co., Ltd.
    Inventors: Toshihiko Naito, Katsura Hata, Yumiko Kaku, Akihiko Tsuruoka, Itaru Tsukada, Manabu Yanagisawa, Toshio Toyosawa, Kazumasa Nara
  • Patent number: 5789429
    Abstract: A compound represented by the general formula: ##STR1## wherein R.sup.1 and R.sup.2 denote a halogen atom or hydrogen atom; R.sup.3 means a hydrogen atom or lower alkyl group; l, r and m stand for 0 or 1; A is N or CH; W denotes an aromatic ring or a condensed ring thereof; X means another aromatic ring, an alkanediyl group, an alkenediyl group, or an alkynediyl group; Y stand for --S--, etc.; Z denotes a hydrogen atom, etc., or a salt thereof, and intermediates thereof or a salt thereof as well as processes for the preparation thereof, and pharmacetical composition suitable for use as an antifungal agent.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: August 4, 1998
    Assignee: Eisai Co., Ltd.
    Inventors: Toshihiko Naito, Katsura Hata, Yumiko Kaku, Akihiko Tsuruoka, Itaru Tsukada, Manabu Yanagisawa, Toshio Toyosawa, Kazumasa Nara
  • 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: 5648372
    Abstract: A compound represented by the general formula: ##STR1## wherein R.sup.1 and R.sup.2 denote a halogen atom or hydrogen atom; R.sup.3 means a hydrogen atom or lower alkyl group; l, r and m stand for 0 or 1; A is N or CH; W denotes an aromatic ring or a condensed ring thereof; X means another aromatic ring, an alkanediyl group, an alkenediyl group, or an alkynediyl group; Y stand for --S--, etc.; Z denotes a hydrogen atom, etc., or a salt thereof, and intermediates thereof or a salt thereof as well as processes for the preparation thereof, and pharmacetical composition suitable for use as an antifungal agent.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: July 15, 1997
    Assignee: Eisai Co., Ltd.
    Inventors: Toshihiko Naito, Katsura Hata, Yumiko Kaku, Akihiko Tsuruoka, Itaru Tsukada, Manabu Yanagisawa, Toshio Toyosawa, Kazumasa Nara
  • 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