Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1991-06-28
1993-10-19
Rizzo, Nicholas S.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
540222, 540225, C07D50118
Patent
active
052546799
ABSTRACT:
A cephalosporin derivative of the formula I: ##STR1## in which X is S, O, CH.sub.2 or SO, ##STR2## represents one of C-7 acyl groups known in the cephalosporin art, R3 is hydrogen or methoxy, R4 is hydrogen, optionally substituted alkyl or allyl, and R5 is an aromatic heterocyclic ring system which is linked via carbon, and which contains a quaternized nitrogen atom.
REFERENCES:
patent: 5049558 (1991-09-01), Bradbury et al.
patent: 5149803 (1992-09-01), Davies et al.
Chemical Abstracts vol. 113(1): 6033m (1989).
Chemical Abstracts vol. 106(3): 18243y (1987).
Bradbury Robert H.
Jung Frederic H.
Lohmann Jean J.
Marsham Peter R.
Pasquet Georges
ICI Pharma
Imperial Chemical Industries plc
Rizzo Nicholas S.
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