The mixture was filtered through Celite®. The solid was rinsed with DCM, and the filtrate was concentrated in vacuo. The residue was redissolved in EtOAc and washed with saturated NH4Cl and brine. The organic layer was dried over Na2SO4, filtered, and concentrated in vacuo to give the crude product, which was purified by flash chromatography on a silica gel column to give the pure product. catalyst was then added, and the mixture was purged with Ar (bubbled into the solution) for 5 minutes. The Ar balloon was replaced with an H2 balloon, and the mixture stirred overnight. The solid was then filtered through Celite® and rinsed with EtOAc. The filtrate was concentrated in vacuo to give a yellow oil, which was dissolved in DCM (10 mL), and the solution was cooled to 0°C. Et3N (113 mg, 0.16 mL, 3 eq) was added, followed by acetyl chloride (35 mg, 0.031 mL, 1.2 eq) and DMAP (5 mg, 0.1 eq). The solution was warmed to room temperature and stirred for 2h.