Enantio-, Diastereo-, and Regioselective Iridium-Catalyzed Asymmetric Allylic Alkylation of Acyclic β-Ketoesters
作者:Wen-Bo Liu、Corey M. Reeves、Brian M. Stoltz
DOI:10.1021/ja4097829
日期:2013.11.20
The first regio-, diastereo-, and enantioselective allylic alkylation of acyclic β-ketoesters to form vicinal tertiary and all-carbon quaternary stereocenters is reported. Critical to the successful development of this method was the employment of iridium catalysis in concert with N-aryl-phosphoramidite ligands. Broad functional group tolerance is observed at the keto-, ester-, and α-positions of the
报道了第一个区域选择性、非对映选择性和对映选择性烯丙基烷基化无环 β-酮酯以形成邻位叔和全碳四元立体中心。该方法成功开发的关键是使用铱催化与 N-芳基亚磷酰胺配体。在亲核试剂的酮-、酯-和α-位观察到广泛的官能团耐受性。各种转换证明了该方法可用于快速访问复杂的对映体富集化合物。