Patents by Inventor Tutomu Ebata

Tutomu Ebata 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).

  • Production process of cyclic compound
    Patent number: 6218548
    Abstract: A compound represented by formula (III): wherein n is an integer of 2 to 5; and R11 represents a substituent group represented by formula: wherein Ra, Rb and Rc each represents a phenyl, phenylmethyl or naphthyl group (which may be substituted with at least one substituent group selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, a halogen atom and a nitro group), a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms, with the proviso that Ra, Rb and Rc are different from one another, and a salt thereof.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: April 17, 2001
    Assignee: Daiichi Paharmaceutical Co., Ltd.
    Inventors: Toshifumi Akiba, Tutomu Ebata, Tatsuru Saito, Sadahiro Shimizu, Keiichi Hirai, Naoki Ohta, Toshiaki Tojo
  • Production process of cyclic compound
    Patent number: 6013806
    Abstract: This invention is to provide a compound represented by the following formula (I) and a compound represented by the following formula (II) useful as an antibacterial agent which is obtained by the compound of formula (I), and also to provide a novel synthetic process for the inexpensive, short-step and industrially advantageous production thereof.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: January 11, 2000
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Toshifumi Akiba, Tutomu Ebata, Tatsuru Saito, Sadahiro Shimizu, Keiichi Hirai, Naoki Ohta, Toshiaki Tojo
  • Production process of cyclic compound
    Patent number: 5856518
    Abstract: This invention is to provide a compound represented by the following formula (I) and a compound represented by the following formula (II) useful as an antibacterial agent which is obtained by the compound of folmula (I), and also to provide a novel synthetic process for the inexpensive, short-step and industrially advantageous production thereof.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: January 5, 1999
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Toshifumi Akiba, Tutomu Ebata, Tatsuru Saito, Sadahiro Shimizu, Keiichi Hirai, Naoki Ohta, Toshiaki Tojo
  • Propoxybenzene derivatives and process for preparing the same
    Patent number: 5312999
    Abstract: Propoxybenzene derivatives represented by the following formula ##STR1## wherein Ra represents a nitro group, an amino group which may have a protecting group or an --NHCH.dbd.C(COO--C.sub.1-6 -Alkyl).sub.2 group, Rb represents a hydrogen atom, a protecting group for the hydroxyl group or a substituted sulfonyl group and Xa and Xb, which may be the same or different, each represents a halogen atom, and processes for preparation thereof are disclosed. These derivatives are useful in preparing antibacterial agents.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: May 17, 1994
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Toshihiro Fujiwara, Tutomu Ebata
  • Propoxybenzene derivatives and process for preparing the same
    Patent number: 5136059
    Abstract: Propoxybenzene derivatives represented by the following formula ##STR1## wherein Ra represents a nitro group, an amino group which may have a protecting group or an --NHCH.dbd.C(COO--C.sub.1-6 -Alkyl).sub.2 group, Rb represents a hydrogen atom, a protecting group for the hydroxyl group or a substituted sulfonyl group and Xa and Xb, which may be the same or different, each represents a halogen atom, and processes for preparation thereof are disclosed. These derivatives are useful in preparing antibacterial agents.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: August 4, 1992
    Assignee: Daiichi Pharmaceutical Co., Ltd.
    Inventors: Toshihiro Fujiwara, Tutomu Ebata