A mild one-pot protocol for the synthesis of symmetrical biaryls by sequential Ir-catalyzed C-H borylation and Cu-catalyzed homocoupling of arenes is described. The regiochemistry of the biaryl formed is sterically controlled as dictated by the C-H borylation step. The methodology is also successfully extended to heteroarenes. Some of the products obtained by this approach are impossible to obtain
描述了一种温和的一锅法方案,该方案通过顺序的Ir催化的CH
硼酸酯化和Cu催化的
芳烃均偶联合成对称的联芳基。所形成的联芳基的区域
化学空间上受CH
硼酸酯化步骤的控制。该方法还成功地扩展到了杂
芳烃。通过这种方法获得的某些产品无法通过Ullmann或Suzuki耦合协议获得。最后,我们显示了一锅序列描述了CH
硼化/ Cu催化的均偶联/ Pd催化的Suzuki偶联以获得π扩展的
芳烃骨架。