Syntheses and biological properties of new 8-fluorocarbapenem derivatives.
作者:Azuma WATANABE、Michiko SAKAMOTO、Yasuo FUKAGAWA、Takeo YOSHIOKA
DOI:10.1248/cpb.39.335
日期:——
the C-3 position of (+/-)-8-fluorocarbapenem, the diastereomeric separation of the 8-fluorocarbapenems became feasible. As expected from penicillins and cephalosporins, (+)-8-fluoro-3-D-cysteinylcarbapenem (+)-7a was antimicrobially active, whereas (-)-7b was inactive. It is worth noting, however, that (+)-7a was significantly more sensitive to renal dehydropeptidase-I than (-)-7b. Irrespective of the
合成了具有各种C-3侧链的8-氟碳青霉烯衍生物,以通过体外生物学评估研究碳青霉烯的结构-活性关系。在外消旋PS-5的C-8处引入氟导致抗微生物活性和对肾脱氢肽酶I的稳定性略有改善。当将D-半胱氨酸另外引入(+/-)-8-氟卡培南的C-3位置时,8-氟卡培南的非对映异构体分离变得可行。正如青霉素和头孢菌素所预期的那样,(+)-8-氟-3-D-半胱氨酰卡培南(+)-7a具有抗菌活性,而(-)-7b无活性。然而,值得注意的是,(+)-7a对肾脱氢肽酶-I的敏感性明显高于(-)-7b。不论在C-8处是否存在氟,在C-3处存在基本的S侧链,如吡啶基和吡咯烷基基团的抗微生物活性和脱氢肽酶-I稳定性显着提高。在7c-g中8氟化与C-3基本侧链的结合显着提高了抗菌活性和脱氢肽酶I的稳定性。