m-Chloroperbenzoic acid → 5-Bromo-3-fluoro-2-(oxiran-2-ylmethoxy)phenyl acetate

関与物質

反応手順

A solution of 1-[5-bromo-3-fluoro-2-(oxiran-2-ylmethoxy)phenyl]ethanone (1.3 g, 4.5 mmol) and m-CPBA (4.0 g, 18 mmol) in DCM (25 ml) was heated at reflux. After 22 h more m-CPBA (2.7 g, 12 mmol) was added and the mixture was heated at reflux for another 22 h and then brought to ambient temperature. The solid was filtered off and rinsed. The resulting filtrate was washed with sodium bicarbonate (saturated), brine and further dried (Na2SO4) and evaporated to dryness to give the crude title compound (2.6 g). MS m/z (rel. intensity, 70 eV) 305 (M+, 5), 304 (M+, 6), 263 (97), 262 (bp), 206 (49), 57 (65).

情報源と証拠