A series of novel derivatives of penicillanic acid 1,1-dioxide, having a disubstituted methyl group of the formula X--CH--Y at the 6-position, and the pharmaceutically-acceptable salts thereof and the pharmaceutically-acceptable esters thereof readily hydrolyzable in vivo, wherein X is hydroxy, acylated hydroxy or amino and Y is carboxy or esterified carboxy. The compounds of the invention are inhibitors of bacterial beta-lactamases, and they will protect certain beta-lactamase-susceptible beta-lactam antibiotics, e.g. ampicillin, against inactivation by beta-lactamases. Co-administration of a compound of the invention with a beta-lactam antibiotic such as ampicillin to a mammalian subject increases the effectiveness of the beta-lactam antibiotic against infections caused by beta-lactamase-producing bacteria.
本发明涉及一系列新型的
青霉酸1,1-二氧化物衍
生物,其在6位具有公式X-CH-Y的二取代甲基基团,以及其医药上可接受的盐和医药上可接受的酯,这些酯在体内容易
水解,其中X是羟基,酰化羟基或
氨基,Y是羧基或酯化羧基。本发明化合物是细菌β-内酰胺酶的
抑制剂,它们将保护某些β-内酰胺酶敏感的β-内酰胺类抗生素,例如
氨苄西林,免受β-内酰胺酶的失活。将本发明化合物与β-内酰胺类抗生素,如
氨苄西林一起给哺乳动物主体使用,可以增强β-内酰胺类抗生素对由β-内酰胺酶产生的细菌感染的有效性。