One-Pot, Modular Approach to Functionalized Ketones via Nucleophilic Addition of Alkyllithium Reagents to Benzamides and Pd-Catalyzed α-Arylation
作者:Alexander T. Wolters、Valentin Hornillos、Dorus Heijnen、Massimo Giannerini、Ben L. Feringa
DOI:10.1021/acscatal.6b00134
日期:2016.4.1
efficient, in situ sequential 1,2-addition of alkyllithium reagents to benzamides followed by α-arylation of the resulting alkyl ketones is reported. The use of Pd[P(t-Bu)3]2, as catalyst for the α-arylation reaction, allows access to a wide variety of functionalized benzyl ketones in a modular way. The decomposition of the tetrahedral intermediate originated from the 1,2-addition liberates in situ a
据报道,将烷基锂试剂高效,原位依次加成1,2-苯甲酰胺,然后对所得的烷基酮进行α-芳基化。使用Pd [P(t- Bu)3 ] 2作为α-芳基化反应的催化剂,可以模块化的方式获得各种官能化的苄基酮。源自1,2-加成的四面体中间体的分解原位释放出酰胺化锂,因此避免了需要用于α-芳基化的外部碱。该方法使用多种烷基锂试剂,苯甲酰胺和芳基溴化物可提供良好的总收率,这些烷基锂试剂具有一系列官能团,且对单芳基化产物具有完全选择性。