申请人:Pfizer Inc.
公开号:US04714761A1
公开(公告)日:1987-12-22
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 treatment of bacterial infections in mammals, particularly humans.
一种制备在体内容易水解的青霉酸1,1-二氧化物及其酯的工艺,包括将6,6-二卤青霉酸或在体内容易水解的其酯氧化为相应的6,6-二卤青霉酸1,1-二氧化物或其酯,然后进行去卤化(例如,通过氢解)。在体内容易水解的6,6-二卤青霉酸1,1-二氧化物及其酯是新颖的中间体。青霉酸1,1-二氧化物及其在体内容易水解的酯是已知的化合物,可用作β-内酰胺酶抑制剂,并可增强某些β-内酰胺类抗生素(例如青霉素)在治疗哺乳动物,尤其是人类的细菌感染中的有效性。