Table 1.
Yields were determined by 1H NMR using dibromomethane as internal standard. Condition A: Substrate 1 (0.1 mmol), aryl iodide (0.3 mmol), Pd(OAc)2 (10 mol%), AgOAc (2.5 equiv), Li2CO3 (2.0 equiv) in DCE (1.0 mL), 120 °C, 24 h; Condition B: Substrate 1 (0.1 mmol), aryl iodide (0.3 mmol), Pd(OAc)2 (10 mol%), Ligand (40 mol%), AgTFA (1.5 equiv), in HFIP (1.0 mL), 100 °C, 4 h.
Ligand L6 was used with condition B.
No reaction under condition B.
No reaction under condition A.
Using condition B and DG9 as directing group.