Patents by Inventor Daikichi Nishimura

Daikichi Nishimura 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).

  • N.sup.4 -Alkoxycarbonylarabinofuranosylcytosine
    Patent number: 4367332
    Abstract: A N.sup.4 -alkoxycarbonylarabinofuranosylcytosine represented by the formula: ##STR1## wherein R is an aliphatic hydrocarbon group having 4 to 22 carbon atoms. These compounds are useful as anti-tumor agents.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: January 4, 1983
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Daikichi Nishimura, Toshiaki Sugawara, Nobuyoshi Emoto
  • Diacylnucleosides and process for preparing the same
    Patent number: 4097665
    Abstract: Compounds represented by formula (I) ##STR1## wherein one of Z.sub.1 ', Z.sub.2 ', Z.sub.3 ' and Z.sub.4 ' represents R, another one of Z.sub.1 ', Z.sub.2 ', Z.sub.3 ' and Z.sub.4 ' represents Z, and the remaining two moieties of Z.sub.1 ', Z.sub.2 ', Z.sub.3 ' and Z.sub.4 ' represents a hydrogen atom and/or a protective group, one of R and Z represents A.sub.1 and the other represents A.sub.2, A.sub.1 being an acyl group having 14 to 22 carbon atoms which does not contain a carboxylic group and A.sub.2 being an acyl group having 2 to 14 carbon atoms and having one carboxyl group, X represents a hydrogen atom or a halogen atom (hereinafter referred to as Compound Ia); a 2,2'-anhydro product of Compound Ia wherein Z.sub.2 ' represents a hydrogen atom (hereinafter referred to as Compound Ib); an arabinosylation product of Compound Ia (hereinafter referred to as Compound Ic); a deamination product of Compound Ia (hereinafter referred to as Compound Id); a 2'-deoxy product of Compound Id wherein Z.sub.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: June 27, 1978
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Torao Ishida, Minoru Akiyama, Daikichi Nishimura, Hiroshi Hayashi, Yoshio Sakurai, Shigeru Tsukagoshi
  • 5-Fluorouracil derivatives
    Patent number: 4088646
    Abstract: A compound represented by the formulae: ##STR1## wherein R.sub.1 and R.sub.2 are as defined hereinafter, useful as an anti-cancer or anti-tumor agent.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: May 9, 1978
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Torao Ishida, Daikichi Nishimura, Toshiaki Sugawara, Tadaaki Ooka