Catalytic Borylation of SCF3-Functionalized Arenes by Rhodium(I) Boryl Complexes: Regioselective C—H Activation at the ortho-Position

摘要

An unprecedented reaction pathway for the borylation of SCF3-containing arenes using Rh(Bpin) (PEt3)3 (pin = pinacolato) is reported. Catalytic processes were developed and the functionalizations proceed under mild reaction conditions. The C~H activations occur with a unique regioselec-tivity for the position ortho to the SCF3 group, which apparently serves as directing group. Borylated SCF3 compounds can serve as versatile building blocks.