The Ring Is Bonded Directly To The -c(=x)- Group Patents (Class 540/339)
  • Process for the production of penicillanic acid compounds
    Patent number: 4942229
    Abstract: An improved process for the production of penicillic acid compounds, especially chloromethyl ester of penicillin G, penicillin V or sulbactam is disclosed.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: July 17, 1990
    Assignee: Yoshitomi Pharmaceutical Industries, Ltd.
    Inventors: Kazumi Saeki, Masami Hirano, Kunihide Oka, Kazuto Tsukinuki, Setsuo Oikawa
  • Methylene penam and derivatives thereof
    Patent number: 4801704
    Abstract: There are presented compounds of the formula ##STR1## wherein R.sub.2, R.sub.3, R.sub.4 and m are as described herein.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: January 31, 1989
    Assignee: Hoffman-La Roche Inc.
    Inventors: Dennis D. Keith, Chung-Chen Wei, Manfred Weigele
  • Methods of using .beta.-lactam antibacterial agents
    Patent number: 4609652
    Abstract: .beta.-Lactam antibiotics having an .alpha.-formamido substituent on the carbon atom adjacent to the carbonyl group of the .beta.-lactam ring and in particular bicyclic compounds having the partial structure: ##STR1## Intermediates and processes for the preparation of the compounds are further disclosed.
    Type: Grant
    Filed: January 24, 1985
    Date of Patent: September 2, 1986
    Assignee: Beecham Group p.l.c.
    Inventor: Peter H. Milner