作者:Shoji Kobayashi、Keisuke Shibukawa、Yoshiki Hamada、Takuma Kuruma、Asako Kawabata、Araki Masuyama
DOI:10.1021/acs.joc.7b02916
日期:2018.2.2
report short syntheses of (−)-tripterifordin and (−)-neotripterifordin, potent inhibitors of HIV replication, from stevioside, a natural sweetener used worldwide. The key transformations are reduction at C13 through the formation of a tertiary chloride and subsequent three-step lactonization including a selective iodination at C20 by the photoreaction of the C19-alcohol. The title compounds were reliably
我们报道了甜菊糖(全球使用的天然甜味剂)的短效合成(-)-雷公藤素和(-)-新雷公藤素,它们是HIV复制的有效抑制剂。关键的转变是通过叔氯的形成在C13还原,以及随后的三步内酯化,包括通过C19醇的光反应在C20进行选择性碘化。从甜菊糖中分别以9和11个步骤(带有5-7个分离步骤)可靠地获得了标题化合物。此外,相关的含内酯的ent- kaurenes,doianoterpenes A和B,和两个天然产品合成的。