Palladium-Catalyzed C−F Activation of Polyfluoronitrobenzene Derivatives in Suzuki−Miyaura Coupling Reactions
作者:Matthew R. Cargill、Graham Sandford、Andrezj J. Tadeusiak、Dmitrii S. Yufit、Judith A. K. Howard、Pinar Kilickiran、Gabrielle Nelles
DOI:10.1021/jo100877j
日期:2010.9.3
substrates for palladium-catalyzed C−F bond arylation using readily available palladium catalysts under both conventional heating and microwave conditions. Arylation occurs ortho to the nitro group offering a synthetic route to polyfluorinated 2-arylnitrobenzene systems. The regiochemistry of the arylation reactions suggests that there is a significant directing interaction between the nitro group and the incoming
高度氟化的硝基苯衍生物是在常规加热和微波条件下使用易于获得的钯催化剂进行钯催化的C-F键芳基化的合适底物。芳基化发生在邻位到硝基上,为合成多氟2-芳基硝基苯系统提供了一条合成途径。芳基化反应的区域化学表明,在硝基和进入的亲核钯催化剂之间存在显着的直接相互作用,这是由于在环上存在几个氟原子而促进的。对几种四氟和三氟硝基苯衍生物的区域选择性和反应性的研究,为氧化加成步骤的高度亲核特性提供了进一步的证据,这与涉及芳基碘化物和溴化物的更常规的Suzuki-Miyaura偶联反应的协同机理相反。