Patents by Inventor Naoko Tsukahara

Naoko Tsukahara 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).

  • Sulfonamide-containing heterocyclic compounds
    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
  • Sulfonamide-containing heterocyclic compounds
    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
  • Tricyclic heterocyclic sulfonamide and sulfonic ester derivatives
    Patent number: 5854274
    Abstract: Novel tricyclic heterocyclic sulfonamide derivatives and sulfonic ester derivatives which have excellent antitumor activity and are represented by the following general formula (I) and processes for producing the same are provided. The present sulfonamide derivatives or a sulfonic ester derivatives are represented by the following general formula (I): ##STR1## wherein G represents an aromatic 5- or 6-membered ring; L represents 0 or --N(R.sup.1)-- and --R.sup.1 represents hydrogen or lower alkyl; and M represents a tricyclic structure selected from among the following; ##STR2## rings A and B each represent an unsaturated 5- or 5 -membered ring; X represents N(R.sup.2) wherein R.sup.2 represents hydrogen or lower alkyl, or NHCO; Y represents 0, S(O).sub.n, C(R.sup.3) (R.sup.4), C(O), N(R.sup.5), CH(R.sup.6)CH(R.sup.7), C(R.sup.8).dbd.C(R.sup.9), N(R.sup.10) C(O), N.dbd.CR.sup.11), OCH(R.sup.12), S(O).sub.n CH(R.sup.13) or N(R.sup.14)CH(R.sup.15); Z represents nitrogen or C(R.sup.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: December 29, 1998
    Assignee: Eisai Co., Ltd.
    Inventors: Hiroshi Yoshino, Norihiro Ueda, Jun Niijima, Toru Haneda, Yoshihiko Kotake, Kentaro Yoshimatsu, Tatsuo Watanabe, Takeshi Nagasu, Naoko Tsukahara, Nozomu Koyanagi, Kyosuke Kitoh
  • Tricyclic heterocyclic sulfonamide and sulfonic ester derivatives
    Patent number: 5846969
    Abstract: A sulfonamide derivative or a sulfonic ester derivative represented by the following general formula (I): ##STR1## {G represents an aromatic 5- or 6-membered ring; L represents O or --N(R.sup.1)-- (R.sup.1 represents hydrogen or lower alkyl); and M represents ##STR2## rings A and B represent each an unsaturated 5- or 6-membered ring; Y represents O, S(O).sub.n, C(R.sup.3)(R.sup.4), C(O), N(R.sup.5), CH(R.sup.6)CH(R.sup.7), C(R.sup.8).dbd.C(R.sup.9), N(R.sup.10)C(O), N.dbd.C(R.sup.11), OCH(R.sup.12), S(O).sub.n CH(R.sup.13) or N(R.sup.14)CH(R.sup.15).
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: December 8, 1998
    Assignee: Eisai Co., Ltd.
    Inventors: Hiroshi Yoshino, Norihiro Ueda, Jun Niijima, Toru Haneda, Yoshihiko Kotake, Kentaro Yoshimatsu, Tatsuo Watanabe, Takeshi Nagasu, Naoko Tsukahara, Nozomu Koyanagi, Kyosuke Kitoh
  • Tricyclic heterocyclic sulfonamide and sulfonic ester derivatives
    Patent number: 5834462
    Abstract: Novel tricyclic heterocyclic sulfonamide derivatives and sulfonic ester derivatives which have each an antitumor action and are represented by the following general formula (I) and processes for producing the same are provided. These compounds have each an excellent antitumor activity.A sulfonamide derivative or a sulfonic ester derivative represented by the following general formula (I): ##STR1## {G represents an aromatic 5- or 6-membered ring; L represents 0 or --N(R.sup.1)-- (R.sup.1 represents hydrogen or lower alky); and M represents a tricyclic structure selected from among the following ones; ##STR2## ?rings A and B represent each an unsaturated 5- or 6-membered ring; X represents N(R.sup.2), (wherein R.sup.2 represents hydrogen or lower alkyl), or NHCO;Y represents O, S(O).sub.n, C(R.sup.3)(R.sup.4), C(O), N(R.sup.5), CH(R.sup.6)CH(R.sup.7), C(R.sup.8).dbd.C(R.sup.9), N(R.sup.10)C(O), N.dbd.C(R.sup.11), OCH(R.sup.12), S(O).sub.n CH(R.sup.13) or N(R.sup.14)CH(R.sup.15);Z represents nitrogen or C(R.sup.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: November 10, 1998
    Assignee: Eisai Co., Ltd.
    Inventors: Hiroshi Yoshino, Norihiro Ueda, Jun Niijima, Toru Haneda, Yoshihiko Kotake, Kentaro Yoshimatsu, Tatsuo Watanabe, Takeshi Nagasu, Naoko Tsukahara, Nozomu Koyanagi, Kyosuke Kitoh