作者:Miaosheng Li、Jana Scott、George A. O’Doherty
DOI:10.1016/j.tetlet.2003.11.089
日期:2004.1
A flexible, enantioselective route to highly functionalized α,β-unsaturated δ-lactones has been applied to the synthesis of 7-oxa-phomopsolide E and its C-4 epimer. This approach relies on the application of the Noyori asymmetric hydrogenation of furyl ketone to produce the secondary furyl alcohol in high enantioexcess, which can be stereoselectively transformed into α,β-unsaturated-δ-lactones by a
灵活,对映选择性的途径可高度官能化的α,β-不饱和δ-内酯已被用于7-氧杂磷光固体E及其C-4差向异构体的合成。该方法依赖于应用Noyori呋喃酮不对称氢化来生产高对映体过量的仲呋喃醇,后者可以通过短的,高度非对映选择性的氧化和还原序列立体选择性地转化为α,β-不饱和δ-内酯。DCC和Mitsunobu偶联用于引入两个天然产物类似物的侧链。