After stirring at 70 °C for 30 minutes, the reaction vessel was removed from the oil bath and allowed to cool to room temperature. Once at room temperature, the reaction mixture was diluted with Na2S2O3 (5 mL), and water (5 mL). The layers were separated and the aqueous layer was extracted with CH2Cl2 (3 x 10 mL). The combined organic extracts were washed with brine (15 mL), dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure by rotary evaporation to give the intermediate bromide as a yellow oil and a 2:1 mixture of diastereomers, which was used without further purification (710 mg, 54%).