First synthesis of racemic saphenamycin and its enantiomers. investigation of biological activity
作者:Jane B. Laursen、Charlotte G. Jørgensen、John Nielsen
DOI:10.1016/s0968-0896(02)00472-8
日期:2003.3
acid. Enantiomers of saphenamycin were obtained from resolved saphenic acid and screened against a range of skin flora and resistant Staphylococcus aureus strains. Biological activities of saphenamycin enantiomers were compared with that of the synthetic racemate as well as earlier reported activities of saphenamycin isolated from natural sources. No significant difference was observed in activity of
天然抗生素saphenamycin,6- [1-(2-羟基-6-甲基-苯甲酰氧基)-乙基] -phenazine-1-羧酸,是通过使用羧基和苯氧基官能团的临时烯丙基保护而由隐苯二酸合成的。通过结晶相应的(-)-亮氨酸非对映异构体盐来消旋外消旋的庚二酸,并且通过X射线晶体学测定具有-R构型的(-)-布鲁西铵(-)-隐二烯酸酯的绝对构型。这也被证明是天然大庚酸的构型。隐霉素的对映体是从拆分的隐酸中获得的,并针对一系列皮肤菌群和耐药的金黄色葡萄球菌菌株进行了筛选。比较了沙霉素霉素对映体的生物活性与合成外消旋体的生物活性,以及较早报道的从天然来源分离出的沙霉素霉素的活性。沙霉素的对映体活性没有观察到显着差异,这表明沙霉素的手性对抗生素活性没有影响。沙芬霉素被证明是一种对夫西地酸和利福平耐药的金黄色葡萄球菌菌株的有效抗生素,其MIC为0.1-0.2 microg / mL。