申请人:Pfizer Inc.
公开号:US04356122A1
公开(公告)日:1982-10-26
6-Alpha and 6-beta-substituted penicillanic acid derivatives of the formula: ##STR1## wherein R is H or a conventional penicillin carboxy protecting group or an ester forming residue readily hydrolyzable in vivo and R.sup.1 is a perhaloalkyl group of from 1 to 4 carbon atoms wherein the halogen atoms are fluoro or chloro, undergo SN.sub.2 nucleophilic displacement with halide or azide ions with inversion of configuration at C-6 to yield the corresponding 6-beta or 6-alpha-halo- or azido-substituted product.
公式为:##STR1## 其中R为H或传统的青霉素羧基保护基或易于在体内水解的酯基残基,R.sup.1为由1至4个碳原子组成的全卤烷基,其中卤素原子为氟或氯。这些6-Alpha和6-beta取代的青霉素酸衍生物可与卤化物或叠氮离子发生SN.sub.2亲核位移反应,并在C-6处配置反转,生成相应的6-beta或6-alpha卤代或叠氮代产物。