One-Pot Diastereoselective Preparation of <i>α</i>,<i>β</i>-Unsaturated-<i>γ</i>-Silylated-<i>δ</i>-Lactones: Application towards Natural Compounds
作者:Frédéric Marion、Rachel Le Fol、Christine Courillon、Max Malacria
DOI:10.1055/s-2001-9700
日期:——
Rearrangement of silylated vinyloxiranes into highly functionalized α-silylated-β,γ-unsaturated aldehydes occurs with total chirality transfer and retention of double bond configuration under Pd(0) catalysis. We show that this reaction is a versatile tool in the field of total stereoselective synthesis: enantiomerically pure lactones are obtained. The pheromone 6-n-undecyltetrahydro-2-pyrone 2 and massoilactone, 5-hydroxy-2-decenoic acid lactone 3, are synthesized. We describe herein a novel highly diastereoselective route to α,β-unsaturated-γ-silylated-δ-substituted-δ-lactones 1.
在Pd(0)催化下,硅化的乙烯氧杂环在重新排列过程中转化为高度功能化的α-硅化-β,γ-不饱和醛,同时实现了完全的手性转移及双键构型的保持。我们展示了这一反应作为全立体选择性合成领域的多功能工具:可以获得对映体纯的内酯。合成了信息素6-n-undecyltetrahydro-2-pyrone 2和质量内酯5-hydroxy-2-decenoic acid lactone 3。我们在此描述了一条新颖的高二面体选择性路线,以合成α,β-不饱和-γ-硅化-δ-取代的δ-内酯1。