An easily available NHC-Pd(II)-Im (NHC = N-heterocyclic
carbene, Im = 1-methylimidazole) complex
was found to be an efficient catalyst for the α-arylation
reaction between ketones and aryl chlorides. Under the optimal conditions,
all reactions proceeded smoothly to give the desired products in
good to high yields within hours.
N-heterocyclic carbenes - palladium - α-arylation - aryl chlorides - ketones