Copper-in-charcoal (Cu/C) promoted diaryl ether formation.
Copper impregnated into charcoal efficiently catalyzes cross-couplings between aryl bromides and phenols. The etherifications were conveniently promoted by microwave heating. [structure: see text]
Lipshutz
Bruce H
BH
Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA. lipshutz@chem.ucsb.edu
Unger
John B
JB
Taft
Benjamin R
BR