An efficient homogeneous palladium-catalyzed selective deoxygenation of 2,2′-biphenols
by reduction of aryl triflates with HCO2H as the hydrogen source is reported. This protocol complements the current method
based on heterogeneous Pd/C-catalyzed hydrogenation with hydrogen gas. This process
provided the reduction products in good to excellent yields, which could be readily
converted to various synthetically useful molecules, especially ligands for catalytic
synthesis.
Key words
palladium - homogeneous catalysis - 2,2′-biphenols - reduction - formic acid