专利号:EP-0024372-A1 优先权日:1979-08-03 标题:Derivatives of clavulanic acid, their preparation and pharmaceutical compositions containing them 发明人:DENERLEY PAUL MILLINGTON; EGLINGTON ALFRED JOHN; HARBRIDGE JOHN BARRY 权利人:BEECHAM GROUP PLC 摘要:The compounds of the formula (II):n and salts and esters thereof wherein the hydroxyl group occupies position 2 or 4 R 1 and R 2 may be the same or different and represent hydrogen, halogen, hydroxy, lower alkyl, cyclopentyl, cyclohexyl, lower alkoxy or R, and R 2 when an adjacent carbon atoms may together represent a 1,4-buta-1,3-dienylene group or a polymethylene group containing from 3 to 5 carbon atoms; have been found to be β-lactam antibiotics and synergists with penicillins and cephalosporins. Their preparation and use is described. The synthesis of intermediates useful in their preparation is also described.