Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1986-08-05
1988-08-09
Rizzo, Nicholas S.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
514192, C07D49900, A61K 31425
Patent
active
047629207
ABSTRACT:
A process for the preparation of penicillanic acid 1,1-dioxide and esters thereof readily hydrolyzable in vivo, which comprises oxidation of a 6,6-dihalopenicillanic acid, or an ester thereof readily hydrolyzable in vivo, to the corresponding 6,6-dihalopenicillanic acid 1,1-dioxide or ester thereof, followed by dehalogenation (e.g. by hydrogenolysis). The 6,6-dihalopenicillanic acid 1,1-dioxides and esters thereof readily hydrolyzable in vivo are novel intermediates. Penicillanic acid 1,1-dioxide, and esters thereof readily hydrolyzable in vivo, are known compounds which are useful as beta-lactamase inhibitors and for enhancing the effectiveness of certain beta-lactam antibiotics (e.g. the penicillins) in the treatement of bacterial infections in mammals, particularly humans.
REFERENCES:
patent: 4234579 (1980-11-01), Barth et al.
patent: 4420426 (1983-12-01), Moore et al.
Carroll Ronnie D.
Volkmann Robert A.
Pfizer Inc.
Rizzo Nicholas S.
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