Boron tribromide → 1-[2-Hydroxy-4-(methylthio)phenyl]ethanone

Participants

Reaction Steps

Boron tribromide (19 ml, 1 N in DCM, 19 mmol) was added to a mixture of crude 1-[2-methoxy-4-(methylthio)phenyl]ethanone (3.6 g, 16.9 mmol) and DCM (25 ml) at 0° C. The mixture was brought to room temperature and stirred for 3 h. Ice/water was added, the organic phase was separated and the water phase was extracted with EtOAc. The combined organic phases were filtered through a short plug of silica (EtOAc) and were concentrated to give the title compound (3.0 g) MS m/z (rel. intensity, 70 eV) 183 (6), 182 (M+, 53), 168 (10), 167 (bp), 152 (6).

Provenance & Evidence