Upon formation of palladium precipitate, the reaction vessel was immediately removed from the oil bath and sat. aq. NH4Cl (5 mL) was added to the hot reaction mixture. The reaction mixture was diluted with Et2O (5 mL) and the organic phase was separated. The aqueous phase was extracted with Et2O (2 x 5 mL) and the combined organic extracts were washed with brine (15 mL), dried with Na2SO4, filtered, and concentrated under reduced pressure by rotary evaporation. *For entry 1, fewer equivalents of diethyl allyl phosphate (35.6 μL, 0.2 mmol, 1.0 equiv) was used.