only two conformations. Substituents have been varied in order to find those which lead to a strong preference of the conformer equilibrium. Studying 2-substituted 4-methylpentanes 3 and 4-benzyloxypentanes 12, it has been shown that substituent effects on the conformer equilibria are not additive, as would be expected on the grounds of steric effects alone. Rather, interactions between polar groups
Expanding the antibacterial selectivity of polyether ionophore antibiotics through diversity-focused semisynthesis
作者:Shaoquan Lin、Han Liu、Esben B. Svenningsen、Malene Wollesen、Kristian M. Jacobsen、Frederikke D. Andersen、Jaime Moyano-Villameriel、Christine N. Pedersen、Peter Nørby、Thomas Tørring、Thomas B. Poulsen
DOI:10.1038/s41557-020-00601-1
日期:2021.1
Polyetherionophores are complex natural products capable of transporting cations across biological membranes. Many polyetherionophores possess potent antimicrobial activity and a few selected compounds have the ability to target aggressive cancer cells. Nevertheless, ionophore function is believed to be associated with idiosyncratic cellular toxicity and, consequently, human clinical development