Patents by Inventor John P. Bailey

John P. Bailey 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).

  • Intermediates for the preparation of beta-lactam antibiotics
    Patent number: 5053500
    Abstract: Cephalosporin derivatives of the formulae ##STR1## wherein X is sulphur, oxygen, methylene or sulphinyl, R3 is hydrogen or methoxy, R54 is hydrogen or a carboxyl protecting group, R.sup.51 is a (1-4C)alkyl group, R.sup.4 is hydrogen, (1-4C)alkyl, halo(1-4C)alkyl, hydroxy(1-4C)alkyl, (1-4C)alkoxy(1-4C)alkyl, carboxy (1-4C)alkyl, amino (1-4C)alkyl, cyano(1-4C)alkyl, (1-4C)alkanoylamino(1-4C)alkyl, allyl, furfuryl, benzyl or pyridyl(1-4C)alkyl and R.sup.52 is an amino protecting group and salts thereof are useful as intermediates in the preparation of cephalosporin antibiotics.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: October 1, 1991
    Assignee: Imperial Chemical Industries PLC
    Inventors: John P. Bailey, Georges Pasquet