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and backfilled with Ar. Then aryl halide (1.0 mmol),
trifluoro-acetamide (170 mg), DMEDA (12 lL) and
solvent (1.0 mL, DMF for ArI and dioxane for ArBr)
were added under Ar. The reaction mixture was stirred for
24–48 h at 45 ꢁC (for ArI) or 75 ꢁC (for ArBr). Sub-
sequently to the reaction mixture was added CH3OH/H2O
(3.0 mL/3.0 mL) under Ar. The reaction was further
stirred for 5–12 h. The resulting suspension was cooled
to room temperature, concentrated and extracted with
ethyl acetate (20 mL · 3). The combined organic layers
were concentrated and the residue was purified by column
chromatography to afford the product.