Water → 3-Benzyl-6-oxa-3-azabicyclo(3.1.0)hexane

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Reaction Steps

To an ice-cooled solution of 1-benzyl pyrroline (0.01 mol), 98% H2SO4 (0.012 mol), water (1.5 g), and acetone (10 mL) in a round bottom flask was added 77% m-CPBA (0.013 mol) with stirring, and allowed to react for about 50 h at room temperature. After completion of the reaction (TLC monitor), acetone was evaporated under reduced pressure, and the mixture was neutralized by 1M NaOH, and extracted with toluene (30 mL×3). The precipitates that appeared were filtered, and the filtrate was repeatedly washed with water (30 mL×2). After the solvent was evaporated under reduced pressure, pure product was obtained in 77% yield via column chromatography (silica gel, CH2Cl2:EtOAc:MeOH, 7.5:2.00:0.5).

Provenance & Evidence