A. Zapf et M. Beller, Palladium/phosphite catalyst systems for efficient cross coupling of aryl bromides and chlorides with phenylboronic acid, CHEM-EUR J, 6(10), 2000, pp. 1830-1833
The Suzuki reaction of aryl bromides is efficiently catalyzed by palladium/
phosphite complexes generated in situ. The influence of ligand, base, and d
ifferent additives is examined. The process tolerates various functional gr
oups and catalyst turnover numbers up to 820 000 are obtained even with dea
ctivated aryl bromides. For the first time it is shown that palladium/phosp
hite complexes also catalyze efficiently the Suzuki reaction of aryl chlori
des.