Critical Switching of Cyclization Modes of Polyepoxides in Acidic Aqueous Media and Neutral Water: Synthesis and Revised Structure of a Nerolidol‐Type Sesquiterpenoid
作者:Keisuke Nishikawa、Kengo Morita、Subaru Hashimoto、Akihiro Hoshino、Takumi Ikeuchi、Momochika Kumagai、Yoshiki Morimoto
DOI:10.1002/anie.201906039
日期:2019.7.22
polyepoxides in neutral water and followed a different cyclization mode from those observed so far. The novel cascade cyclization in H2O was applied to the synthesis of a new nerolidol‐type sesquiterpenoid, resulting in revision of the proposed structure and determination of the absolute configuration.
仿生环氧化物的多环氧化物开放级联反应可以高效,快速地构建聚醚骨架。在此,我们表明在酸性水介质中提供四氢呋喃产物的环氧化物开放级联环化反应在中性水中产生四氢吡喃(THP)。通过简单地在中性水中加热聚环氧化物来进行THP的形成,并遵循与迄今为止观察到的环化模式不同的环化模式。在H 2 O中的新型级联环化反应被用于合成新的nerolidol型倍半萜类化合物,从而导致了拟议结构的修订和绝对构型的确定。