β-Lactamase-stable penicillins. Synthesis and structure–activity relationships of (Z)-alkyloxyimino penicillins; selection of BRL 44154
作者:Pamela Brown、Stephen H. Calvert、Pauline C. A. Chapman、Suzanne C. Cosham、A. John Eglington、Richard L. Elliot、Michael A. Harris、Jeremy D. Hinks、John Lowther、David J. Merrikin、Michael J. Pearson、Roger J. Ponsford、John V. Syms
DOI:10.1039/p19910000881
日期:——
A series of (Z)-2-alkyloxyimino-2-(2-aminothiazol-4-yl)acetamidopenicillins has been prepared. New methodology has been developed to prepare tertiary alkyl oximes. High stability to β-lactamases and potent antibacterial activity have been achieved against Gram-positive and certain Gram-negative organisms. Activity against methicillin-resistant Staphylococcus aureus was an unexpected finding. The cyclopentyl
A series of 2-oxaisocephems with a thio-substituted methyl group at the 3-position and a 2-aminothiazol-4-yl moiety at the 7-position was synthesized via benzyl 3-acetyloxymethyl-7-azido-8-oxo-1-aza-4-oxabicyclo[4.2.0]oct-2-ene-2-carboxylate (2), derived from benzyl acetoacetate (1). The new 2-oxaisocephems were tested for antibacterial activities. Among them, the derivatives having a [2-(2-aminothiazol-4-yl)-2-(Z)-cyclopentyloxyimino]acetamido group at the 7-position characteristically showed potent activities against gram-positive bacteria including methicillin-resistant Staphylococcus aureus (MRSA) and Enterococcus faecalis as compared with cefuzonam and cefmenoxime, which are third-generation cephalosporins.
Aminothiazole substituted penicillins and antibacterial compositions
申请人:Beecham Group P.L.C.
公开号:US04816452A1
公开(公告)日:1989-03-28
The present invention provides a compound of formula (I) or a pharmaceutically acceptable salt or in-vivo hydrolysable ester thereof: ##STR1## wherein R.sup.1 is hydrogen or an amino protecting group and R is substituted methyl; optionally substituted C.sub.2-12 alkyl, alkenyl or alkynyl; carbocyclyl; aryl or heterocyclyl. These compounds have antibacterial properties, and therefore are of use in the treatment of bacterial infections in humans and animals caused by a wide range of organisms.
6-Beta-(alpha-etherified oxyimino)-acylamino penicillanic-acid derivatives, their preparation and use
申请人:BEECHAM GROUP PLC
公开号:EP0210815A2
公开(公告)日:1987-02-04
The present invention provides a compound offormula (I) or a pharmaceutically acceptable salt or in-vivo hydrolysable
wherein R' is hydrogen or an amino protecting group and R is substituted methyl; optionally substituted C2-12 alkyl, alkenyl or alkynyl; carbocyclyl; aryl or heterocyclyl. These compounds have antibacterial properties, and therefore are of use in the treatment of bacterial infections in humans and animals caused by a wide range of organisms.