Configurationally Stabilized Analogs of <i>M. ulcerans</i> Exotoxins Mycolactones A and B Reveal the Importance of Side Chain Geometry for Mycolactone Virulence
作者:Matthias Gehringer、Patrick Mäder、Philipp Gersbach、Bernhard Pfeiffer、Nicole Scherr、Jean-Pierre Dangy、Gerd Pluschke、Karl-Heinz Altmann
DOI:10.1021/acs.orglett.9b01947
日期:2019.8.2
cause of Buruli ulcer. 1a/b represent a rapidly equilibrating mixture of Z/E isomers about the C4′═C5′ double bond of the C5-side chain. Here, we describe the syntheses of mycolactone analogs with configurationally stable C5-side chains (2a, E mimetic; 2b/c, Z mimetics). Based on the cytotoxicity of 2a–c, the Δ4′,5′-trans isomer of mycolactones A/B (1b) appears to be the major virulence factor.
分枝杆菌内酯A / B(1a / b)是溃疡分枝杆菌的外毒素,这是布鲁氏菌溃疡的分子原因。图1a / b代表围绕C5-侧链的C4'-C5'双键的Z / E异构体的快速平衡混合物。在这里,我们描述了具有结构稳定的C5侧链(2a,E模拟物;2b / c,Z模拟物)的Mycolactone类似物的合成。基于对细胞毒性2A - Ç中,Δ 4',5' -反式的mycolactones A / B(异构体1B)似乎是主要的致病因素。