Asymmetric Total Synthesis of Ventilanones A and B, Two Naturally Occurring Pyranonaphthoquinones from Ventilago harmandiana
作者:Vichai Reutrakul、Pramchai Deelertpaiboon、Sopanat Kongsriprapan、Suppachai Krajangsri、Nolan M. Betterley、Chutima Kuhakarn
DOI:10.1055/a-1773-4386
日期:2022.7
The asymmetric synthesis of the novel pyranonaphthoquinones ventilanone A and ventilanone B, isolated from the Thai endemic plant Ventilago harmandiana, is accomplished by employing l-rhamnose and gallic acid as the starting materials. The key reactions are the utilization of a newly introduced reagent, PhSCF2H/SnCl4, for the formylation of sterically hindered aromatics containing an electron-withdrawing
新型吡喃萘醌类ventilanone A和ventilanone B的不对称合成,分离自泰国特有植物VentilagoHarmandiana,通过采用l-鼠李糖和没食子酸作为起始原料。关键反应是利用新引入的试剂 PhSCF 2 H /SnCl 4对含有吸电子甲酯的空间位阻芳烃进行甲酰化,以及利用衍生自l-鼠李糖。所开发的合成方法解决了长期存在的含有吸电子基团的空间位阻芳烃的甲酰化问题,并适用于合成其他在芳环和吡喃环上具有取代基的类似物。