proposed mechanism. By utilizing the β-aryl-γ-methylenecyclohexenylidene-γ-butenolides as starting materials, a highly stereoselective and efficient approach has been developed for the syntheses of frameworks of rubrolide natural products. This strategy was further extended for the total synthesis of rubrolide E.
一类新的γ-
丁烯内酯的设计和合成,即。β -芳基γ亚
丙烯基-γ-
丁烯羟酸内酯,已经从β -芳基-被报道Ž -enoate炔
丙醇在酸的存在下进行。β-芳基-γ-亚
丙烯基-γ-
丁烯内酯及其O 18 -异构体的分离证实了在所提出的机制中
丙二烯基-内酯离子和环状
半缩醛的中介作用。以β-芳基-γ-亚甲基
环己烯基-γ-
丁烯内酯为原料,开发了一种立体选择性高、效率高的合成红
溴内酯
天然产物骨架的方法。该策略进一步扩展到 rubrolide E 的全合成。