摘要:
Disclosed are 2β-substituted-methylpenicillanic acid compounds of the formula wherein n is 0, 1 or 2; and - is monocyclic or bicyclic heterocyclic ring group which has 2 to 4 nitrogen atoms as hetero atom in its ring structure and which may be optionally substituted with alkyl, alkoxycarbonyl, phenyl, formyl or benzyloxycarbonyl optionally having alkyl, nitro or a halogen atom on the benzene ring, with the proviso that said heterocyclic ring group is not 1,2,3-triazol-1-yl; or salts or esters thereof. These compounds are useful as β-lactamase inhibitor.
摘要:
Disclosed is a penicillin derivative of the formula: wherein n is an integer of 0, l or 2; Y is a cyano group, a lower acyl group, a mono- or di-lower alkylthiocarbamoyl group, wherein R₁ is a hydrogen atom, a lower alkyl group, a phenyl group, a group -(CH₂) m -OR₂ or -(CH₂) m COOR₂ (m is an integer of l to 6 and R₂ is a hydrogen atom or a penicillin carboxyl ester-forming group which is commonly used for penicillin derivatives) or a phenyl group substituted by at least one member selected from the class consisting of lower alkyl group, halogen atom and lower alkoxy group; and R is a hydrogen atom or a penicillin carboxyl ester-forming group, or a salt thereof. They are useful as β-lactamase inhibitors.