To a flame-dried 100-mL round-bottomed flask equipped with a magnetic stir bar was added crude alcohol 4-10 (3.9 g, 9.96 mmol, 1.0 equiv), PhMe (20 mL, 0.5 M), and Burgess reagent (3.6 g, 14.9 mmol, 1.5 equiv). The reaction vessel was fitted with an oven-dried reflux condenser, and the reaction apparatus was transferred to an 80 °C preheated oil bath.