Benzylic Phosphates as Electrophiles in the Palladium-Catalyzed Asymmetric Benzylation of Azlactones
作者:Barry M. Trost、Lara C. Czabaniuk
DOI:10.1021/ja301461p
日期:2012.4.4
Palladium-catalyzed asymmetric benzylation has been demonstrated with azlactones as prochiral nucleophiles in the presence of chiral bisphosphine ligands. Benzylic electrophiles are utilized under two sets of reaction conditions to construct a new tetrasubstituted stereocenter. Electron density of the phenyl ring dictates the reaction conditions, including the leaving group. The reported methodology
在手性双膦配体存在的情况下,钯催化的不对称苄基化作用已被证明是使用吖内酯作为前手性亲核试剂。在两组反应条件下利用苄基亲电试剂构建新的四取代立体中心。苯环的电子密度决定了反应条件,包括离去基团。报道的方法代表了氨基酸前体中一种新的不对称碳-碳键形成。