申请人:Pfizer Inc.
公开号:US04397783A1
公开(公告)日:1983-08-09
6-.beta.-Substituted penicillanic acids and derivatives thereof as useful enhancers of the effectiveness of several .beta.-lactam antibiotics against many .beta.-lactamase producing bacteria, and 6-.beta.-substituted penicillanic acid derivatives wherein the carboxy group is protected by a conventional penicillin carboxy protecting group as useful intermediates leading to said synergistic agents. A process for converting 6,6-disubstituted penicillanic acid derivatives to the corresponding 6-.beta.-substituted penicillanic acid congeners.
6-β-取代青霉烷酸及其衍生物作为增强多种β-内酰胺酶产生细菌对多种β-内酰胺类抗生素有效性的有用增效剂,以及6-β-取代青霉烷酸衍生物,其中羧基被传统的青霉素羧基保护基团所保护,作为导致所述协同作用剂的有用中间体。一种将6,6-二取代青霉烷酸衍生物转化为相应的6-β-取代青霉烷酸同系物的方法。