m-Chloroperbenzoic acid → 2,3-Epoxy-[4-(tert-butoxycarbonyl)phenoxy]butane

Participants

Reaction Conditions

Reaction Steps

A solution of trans-4-[4-(tert-butoxycarbonyl)phenoxy]-2-butene (3.10 g, 12.48 mmol) in dry dichloromethane (50 ml) was treated at 22° C. with 3-chloroperoxybenzoic acid (4.30 g, 24.9 mmol) and the resulting mixture was stirred at 22° C. for 18 hours. The mixture was then diluted with toluene, washed with 5% sodium thiosulfate, saturated sodium bicarbonate and brine. After drying (sodium sulfate), evaporation of the solvent gave an oil that was chromatographed on silica gel. Elution with a mixture of toluene and ethyl acetate (95:5) gave 3.16 g (96%) of the title material as an oil which solidified upon standing: bp 85-90° C./0.05 torr (bulb to bulb, air bath temperature); mp 47-48° C.

Provenance & Evidence