Scheme 2.
Reactions were performed on a 0.100 mmol scale to determine yields by 19F NMR spectroscopy. Yields of isolated products are shown in parentheses for reactions performed on a 0.400 mmol scale. General conditions: aryl bromide (1 equiv), 2 (1.5 equiv), CuOAc (20 mol %), KF (1.2 equiv), 100 °C, 24 h. aReactions performed with toluene as solvent and 18-cr-6 (1.2 equiv) as additive.
