before being cooled to 0 °C. A solution of S- benzyl) methanesulfonothioate (665 mg, 2.46 mmol) in dry THF (2 mL) was added dropwise over 10 min. The reaction mixture was stirred at 0 °C for 30 minutes, allowed to warm to room temperature and stirred for 3 hrs. Saturated aqueous ammonium chloride solution (15 mL) was added followed by water (10 mL). The mixture was extracted with ethyl acetate (100 mL, 20 mL, 20 mL) and the combined organic layers were washed with brine (20 mL), dried over magnesium sulfate, filtered and concentrated under reduced pressure. The crude material was purified by flash column chromatography (10 -20% dichloromethane in cyclohexane) to yield the title compound as a yellow oil (269 mg, 39%). ¹H NMR (400 MHz, CDCl3): δ 8.15 (s, 1 H), .