Exploration of the Enantioselective Birch−Cope Sequence for the Synthesis of Carbocyclic Quaternary Stereocenters
作者:Tapas Paul、William P. Malachowski、Jisun Lee
DOI:10.1021/jo0621423
日期:2007.2.1
2-cyclohexen-1-one ring are synthesized with good to excellent levels of enantioselectivity. The quaternary stereocenter is created through a new synthetic sequence involving three reactions: the enantioselective Birch reduction-allylation, enol ether hydrolysis, and the Cope rearrangement. To illustrate the ability of the sequence to enantioselectively generate complex structures, a variety of substrates are described
合成2-环己烯-1-酮环上的四级立体中心,其对映选择性良好至极好。通过涉及三个反应的新合成序列创建四元立体中心:对映选择性的桦木还原-烯丙基化,烯醇醚水解和Cope重排。为了说明该序列对映选择性产生复杂结构的能力,描述了多种底物。值得注意的是,该序列可用于对映选择性生成邻位的四级立体中心,拥塞的芳基四级立体中心和羟烷基取代的四级立体中心。