One-Pot Enantioselective Synthesis of 1,4-Naphthoquinone-Derived Polycycles through Oxidative Dearomatization and Aminocatalysis
作者:Loïc Pantaine、Vincent Coeffard、Xavier Moreau、Christine Greck
DOI:10.1002/ejoc.201403597
日期:2015.3
A synthetic process merging oxidative dearomatization and asymmetric aminocatalysis in a single vessel is reported. The PhI(OAc)2-mediated oxidation of 1,4-dihydroxynaphthalene is followed by a trienamine-mediated Diels–Alder cycloaddition/aldol reaction or a trienamine-mediated Diels–Alder cycloaddition/oxidation sequence depending on the dienal substitution pattern. The polycyclic compounds are obtained
报道了在单个容器中结合氧化脱芳构化和不对称氨基催化的合成过程。PhI(OAc)2 介导的 1,4-二羟基萘氧化之后是三烯胺介导的 Diels-Alder 环加成/羟醛反应或三烯胺介导的 Diels-Alder 环加成/氧化序列,具体取决于二烯醛取代模式。多环化合物以良好的收率获得,对映体过量高达 99%。此外,这些多环结构可以通过前所未有的体光催化 1-萘酚氧化脱芳构化和不对称氨基催化的一锅结合来合成,具有相似的对映选择性。建议使用催化循环来解释反应结果。