N1-Functionalized Indole-Phosphane Oxazoline (IndPHOX) Ligands in Asymmetric Allylic Substitution Reactions
作者:Yu Wang、Matti J. P. Vaismaa、Kari Rissanen、Robert Franzén
DOI:10.1002/ejoc.201101540
日期:2012.3
IndPHOX ligands bearing various groups have been synthesized and the effects of the N1-substituent on the reaction rate, yield, and asymmetric induction in a palladium-catalyzed allylic substitution reaction are reported. The presence of an oxygen atom in the ligands, namely an N-MOM or N-THP group, led to enhancement of the enantioselectivity in the allylic amination reaction. In addition, a ligand with
已经合成了带有各种基团的 N-功能化 IndPHOX 配体,并报道了 N1-取代基对钯催化烯丙基取代反应中反应速率、产率和不对称诱导的影响。配体中氧原子的存在,即 N-MOM 或 N-THP 基团,导致烯丙基胺化反应中的对映选择性增强。此外,在 C-1 处具有手性恶唑啉环和在 C-2 处具有磷烷取代基的配体在不对称烯丙基烷基化反应中以良好的产率提供了高对映选择性。