m-Chloroperbenzoic acid → Benzyl 6-oxa-3-azabicyclo(3.1.0)hexane-3-carboxylate

Participants

Reaction Steps

To a solution of 30 g (133 mmol) of benzyl 3-pyrroline-1-carboxylate in 700 mL of methylene chloride was added 57.2 g (200 mmol) of mCPBA. The reaction mixture was stirred at room temperature overnight and quenched with 250 mL of 20% NaHSO3 aqueous solution. The organic phase was separated, and the aqueous layer was extracted with methylene chloride twice (100 mL×2). The combined extracts were washed with saturated NaHCO3 aqueous solution twice (250 mL×2), brine, dried over Na2SO4, evaporated under reduced pressure. Chromatography on silica gel column with 40% EtOAc-Hexane provided the title compound (24 g, 83%). MS (M+H)+220.

Provenance & Evidence