To a flame-dried 20-mL microwave vial equipped with a magnetic stir bar was added ketone and). The reaction vessel was then transferred to a 0 °C ice-water bath, and Et3N (0.71 mL, 5.1 mmol, 2.0 equiv) was added. Following this, TESOTf (690 µL, 3.05 mmol, 1.2 equiv) was added dropwise over one minute. After stirring at 0 °C for 15 minutes, the reaction vessel was removed from the ice-water bath and allowed to warm to room temperature.