m-Chloroperbenzoic acid → 3-[Tert-butyl(diphenyl)silyl]oxycyclobutyl acetate

Participants

Reaction Steps

To a stirred solution of 1-(3-[tert-butyl(diphenyl)silyl]oxycyclobutyl)ethanone (0.65 g, 0.0018 mol) in dichloromethane (10 mL) at 0° C. was added sodium bicarbonate (0.39 g, 0.0046 mol) and m-chloroperbenzoic acid (1.0 g, 0.0046 mol) with stirring. The reaction was stirred at rt over night. LCMS showed incomplete reaction, another 2.5 eq. of mCPBA and NaHCO3 were added and the reaction was stirred for another day. The reaction was quenched with 20% aq. Na2S2O3 solution (50 mL) and stirred for a further 30 min at rt, then extracted with dichloromethane. The combined organic layers were washed with brine, dried over MgSO4, concentrated and purified on silica gel with Combiflash (silica gel, 0-10% EtOAc/Hex) to give the desired product (0.3 g, 40%) as colorless oil. LCMS calculated for C22H29O3Si(M+H)+: 369.2; Found: 369.4.

Provenance & Evidence