作者:Vaddela Sudheer Babu、Ya Zhou、Yoshito Kishi
DOI:10.1016/j.bmcl.2017.01.036
日期:2017.3
On exposure to visible light, mycolactone A/B, the causative toxin of Buruli ulcer, rearranges to a mixture of four photo-mycolactones apparently via a rare photochemically-induced [4πs + 2πa] cycloaddition. In order to prevent the rearrangement, two C6′-C7′ dihydromycolactone analogs 6′α-15 and 6′β-15 were designed and synthesized. 6′α-15 and 6′β-15 were shown to be stable under not only photochemical
上经由罕见光化学诱导的[明显暴露于可见光,细菌内酯A / B,布鲁里溃疡的致病毒素,重排的四个光电-mycolactones混合物4个π小号 + 2 π一个]环加成。为了防止重排,设计并合成了两个C6'-C7'二氢霉菌内酯类似物6'α- 15和6'β- 15。6′α- 15和6′β- 15不仅在光化学条件下,而且在酸性和碱性条件下均显示稳定。测试了针对任意选择的四种细胞系(人Hek-293,人肺癌A-549,人黑素瘤LOX-IMVI和小鼠L-929)的细胞毒性,从而揭示:(1)两种类似物均保持有效的细胞毒性;(2)6'β- 15对人类细胞系的效力显着高于6'α- 15;(3)与亲本支链内酯A / B相比,6'β- 15对人Hek-293表现出相同的效力,而对人肺癌A-549和人黑素瘤LOX-IMVI的效力明显较低。