ansellones A‐G and (+)‐phorbadione are structurally novel marine secondary metabolites which exhibit anticancer and anti‐HIV activity. The first, asymmetric total syntheses of three structurally representative members, (−)‐ansellones A and B and (+)‐phorbadione, were accomplished in 16–23 steps from (+)‐sclareolide. The route features the first regioselective cyclization of vinyl epoxides with internal
Ansellane型
酯类萜类化合物包括ansellones A-G和(+)-phorbadione是结构新颖的海洋次级代谢产物,具有抗癌和抗HIV活性。从(+)-
香紫苏内酯起16至23步完成了三个结构上具有代表性的成员(-)-杏仁糖A和B和(+)-佛巴丹酮的第一个不对称全合成。这条路线的特点是通过内部醇亲核试剂以1,4加成方式(S N 2')对
乙烯基环氧化合物进行第一次区域选择性环化。此外,烯丙基CH氧化是在合成(-)-
鞣酸A和(+)-佛手瓜酮的后期进行的。预期该策略可适用于其他
茴香油酯类萜类化合物的合成。