Total Synthesis of (+)-Mayolide A. Absolute Structure of Mayolide A, a Secocembrane Diterpenoid from the Soft Coral Sinularia mayi.
作者:Hiroto NAGAOKA、Makoto IWASHIMA、Haruyasu ABE、Kazuo IGUCHI、Yasuji YAMADA
DOI:10.1248/cpb.40.1742
日期:——
The stereoselective total synthesis of (+)-mayolide A (1) was achieved starting from D-mannitol via two crucial steps : stereoselective introduction of a two-carbon unit into the β-position of the butenolide 5 and repeated Claisen rearrangement to produce the side chain. The absolute structure of natural mayolide A from the Okinawa soft coral Sinularia mayi was determined as 2 by the present synthesis.
(+)-mayolide A (1)的立体选择性全合成是从 D-甘露醇开始,通过两个关键步骤实现的:在丁烯内酯 5 的 β 位立体选择性引入一个双碳单元,以及反复进行克莱森重排生成侧链。通过本合成方法,确定了冲绳软珊瑚 Sinularia mayi 中天然 mayolide A 的绝对结构为 2。