作者:Robin Visse、Martin-Alexander Möllemann、Manfred Braun
DOI:10.1002/ejoc.201900822
日期:2019.7.31
The palladium‐catalyzed enantioselective allylic alkylation of nonstabilized lithium enolates is a long‐standing problem in asymmetric syntheses. A protocol based upon suitable reaction conditions and appropriate ligands enables the asymmetric allylation of alkanoic‐acid esters through their lithium enolates in a direct manner that does not require detours via ester surrogates. Thus, stereogenic centers
在非对称合成中,钯催化的非稳定化烯醇锂的对映选择性烯丙基烷基化是一个长期存在的问题。基于合适的反应条件和合适的配体的方案可以直接通过脂肪酸烯醇锂进行链烷酸酯的不对称烯丙基化,而无需通过酯替代物绕行。因此,可以在同构或同构位置上创建立体异构中心。