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Scope of Defluorinative Coupling. a.) standard reaction conditions: 0.2 mmol 1, 1.05-2.0 eq 2, 10 mol% Pd(TFA)2, 11 mol% 4,4’-di-tert-butyl-2,2’-bipyridine (dtbbpy), 0.5 ml DMF, 50 °C; completion of reaction monitored by thin-layer chromatography. b.) Isolated yields c.) reaction run for 5 days. d.) reaction run at 85 °C for 4 days. e.) 47 % yield when corresponding potassium trifluoroborate salt is employed in place of boronic acid.
