Total Synthesis of the Phenolic Glycolipid Mycoside B and the Glycosylated<i>p</i>-Hydroxybenzoic Acid Methyl Ester HBAD-I, Virulence Markers of<i>Mycobacterium tuberculosis</i>
作者:Santiago Barroso、Danny Geerdink、Bjorn ter Horst、Eva Casas-Arce、Adriaan J. Minnaard
DOI:10.1002/ejoc.201300437
日期:2013.7
The phenolic glycolipid mycoside B, present in Mycobacterium bovis and hypervirulent strains of Mycobacterium tuberculosis, has been synthesized for the first time. Multiple methyl groups were introduced by the extensive use of catalytic asymmetric 1,4-addition reactions, asymmetric hydrogenation of a -keto ester afforded the basis for the central 1,3-diol moiety, and introduction of the 2-O-methyl--L-rhamnoside
首次合成了存在于牛分枝杆菌和结核分枝杆菌的高毒力菌株中的酚糖脂分枝杆菌苷 B。通过广泛使用催化不对称 1,4-加成反应引入了多个甲基,α-酮酯的不对称氢化提供了中心 1,3-二醇部分的基础,并引入了 2-O-甲基-- L-鼠李糖苷单元是通过对碘苯酚的立体选择性糖基化和随后的 Sonogashira 偶联实现的,为类似物的生成提供了基础。此外,通过选择性甲基化鼠李糖苷 C-2 处的羟基,首次有效合成了存在于同一物种中的相关单糖 HBAD-I。