Patents by Inventor Koshiro Goda

Koshiro Goda 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).

  • Beta-lactams and their production
    Patent number: 5424422
    Abstract: A beta-lactam compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are, the same or different, each a hydrogen atom or a lower alkyl group, R.sub.3.sup.o is a lower alkyl group having a beta-configuration, R.sub.4 is a carboxyl-protecting group, X is a hydrogen atom or a protected hydroxyl group and COZ is a protected thiolcarboxyl group, which is useful as a valuable intermediate in the stereospecific production of 1-alkylcarbapenem compounds.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: June 13, 1995
    Assignee: Sumitomo Pharmaceuticals Co., Ltd.
    Inventors: Makoto Sunagawa, Akira Sasaki, Koshiro Goda
  • Beta-lactams and their production
    Patent number: 5310897
    Abstract: A beta-lactam compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are, the same or different, each a hydrogen atom or a lower alkyl group, R.sub.3.sup.0 is a hydroen atom or a lower alkyl group having a beta-configuration, R.sub.4 is a carboxyl-protecting group, X is a hydrogen atom or a protected hydroxyl group and COZ is a protected thiolcarboxyl group, which is useful as a valuable intermediate in the stereospecific production of 1-alkylcarbapenem compounds.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: May 10, 1994
    Assignee: Sumitomo Pharmaceuticals Co., Ltd.
    Inventors: Makoto Sunagawa, Akira Sasaki, Koshiro Goda
  • 4-Carboxy azetidinone compounds and production thereof from diketene and a Schiff base
    Patent number: 4556514
    Abstract: .beta.-Lactam compounds which are useful as intermediates for the production of carbapenem or penem derivatives and a process for producing the same. The process comprises reacting a Schiff base with diketene in the presence of an imidazole, reducing the acetyl group of the resulting N-protected-3-acetyl-2-azetidinone-4-carboxylic acid ester, and removing the protecting group for a carboxyl group from the resulting 3-(1-hydroxyethyl)-2-azetidinone-4-carboxylic acid derivative.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: December 3, 1985
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Makoto Sunagawa, Koshiro Goda, Masao Enomoto, Akira Sasaki