Catalytic Borylation of SCF 3 ‐Functionalized Arenes by Rhodium(I) Boryl Complexes: Regioselective CH Activation at the ortho ‐Position

An unprecedented reaction pathway for the borylation of SCF 3 ‐containing arenes using [Rh(Bpin)(PEt 3 ) 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 regioselectivity for the position ortho to the SCF 3 group, which apparently serves as directing group. Borylated SCF 3 compounds can serve as versatile building blocks.