A substrate-directed Pd-catalysed o-aroylation strategy has been demonstrated using new aroyl surrogates viz. terminal aryl alkenes and alkynes in the presence of TBHP. By a subtle change in catalyst from Cu to Pd, a differential selectivity is observed. While terminal aryl alkenes/alkynes in the presence of Cu/TBHP are reported to act as o-aryloxy (ArCOO–) sources, the use of Pd/TBHP installs an aroyl (ArCO–) group at the ortho position with respect to the directing arenes.
已证明了一种基于底物导向的Pd催化o-芳酰化策略,使用了新的芳酰替代物,即末端
芳烃烯和
炔烃,且在
TBHP的存在下进行。通过将催化剂从Cu更改为Pd,观察到了选择性的差异。当末端
芳烃烯/
炔烃在Cu/
TBHP的存在下时,报告称其作为o-芳氧基(ArCOO–)的来源,而使用Pd/
TBHP则在与导向
芳烃相对的邻位引入芳酰基(ArCO–)。