Copper(II) Acetate Catalyzed
Cross-Coupling of Pentafluorophenylboronic Acid with Amines under
an Atmosphere of Oxygen
作者:Weike Su、Weihui Zhong、Zhenyu Liu、Chuanming Yu
DOI:10.1055/s-0028-1083568
日期:——
Under an atmosphere of oxygen and a catalytic amount of Cu(OAc)2, pentafluorophenylboronic acid reacted with anilines at room temperature to produce the corresponding N-pentafluorophenylanilines in moderate to good yields. In the case of alkylamines, unexpected N-alkyl-2,2′,3,3′,4′,5,5′,6,6′-nona-fluoro-biphenyl-4-amines were formed under the similar conditions in moderate yields.
The synthesis, isolation, and reactivity of a cationic, geometrically constrained σ3-P compound in the hexaphenyl-carbodiphosphoranyl-based pincer-type ligand (1+) are reported. 1+ reacts with electron-poor fluoroarenes via an oxidative addition-type reaction of the C–F bond to the PIII-center, yielding new fluorophosphorane-type species (PV). This reactivity of 1+ was used in the catalytic hydrodefluorination