2-Substituted Penems with Amino Acid-Related Side Chains: Synthesis and Antibacterial Activity of a New Series of .beta.-Lactam Antibiotics
作者:Maria Altamura、Enzo Perrotta、Piero Sbraci、Vittorio Pestellini、Federico Arcamone、Giuseppe Cascio、Laura Lorenzi、Giuseppe Satta、Grazia Morandotti、Roberta Sperning
DOI:10.1021/jm00021a013
日期:1995.10
A new series of 6-(hydroxyethyl)penems 2-substituted with amino acid-related side chains was synthesized. The nature of the amino acyl derivative proved to be crucial both from a synthetic point of view, as beta-lactam ring opening can compete with C-2 nucleophilic substitution, and for antibacterial activity. Primary amino acid amides emerged as the most suitable side chains for enhancing permeability
合成了一系列新的6-(羟乙基)青霉烯2-氨基酸相关的侧链取代。从合成的观点来看,氨基酰基衍生物的性质被证明是至关重要的,因为β-内酰胺开环可以与C-2亲核取代竞争,并且具有抗菌活性。伯氨基酸酰胺作为增强通过革兰氏阴性外膜渗透性的最合适的侧链出现。新的2-[((氨基酰胺基)甲基]青霉烯3a-u)的体外活性受酰胺部分的性质和位置,环状酰胺的环大小以及氨基酸构型的影响。