Fluorobenzene and 1,2-difluorobenzene are defluorinated under very mild conditions by H2 (4 atm) at 70 °C in the presence of NaOAc. The heterogeneous catalysts for these reactions contain the rhodium pyridylphosphine (1) and bipyridyl (2) complexes [Rh(COD)(1)]BF4 and [Rh(COD)(2)]BF4 tethered to heterogeneous Pd−SiO2.
氟苯和
1,2-二氟苯在非常温和的条件下,在NaOAc的存在下,在70°C下,通过H 2(4 atm)进行脱
氟。用于这些反应的非均相催化剂包含
吡啶鎓
吡啶膦(1)和联
吡啶(2)络合物[Rh(COD)(1)] BF 4和[Rh(COD)(2)] BF 4束缚到非均相Pd-SiO 2。