Thioanisole → 4-Bromothioanisole

Participants

Reaction Conditions

Reaction Steps

A one-liter four-necked flask equipped with a stirrer, thermometer, dropping funnel and Liebig condenser was charged with 124.2 g (1.0 mole) of thioanisole and 0.068 g (0.001 mole) of boron trifluoride, and 160 g (1.0 mole) of bromine was added dropwise with stirring at 50° C. over 4 hours. Thereafter, the reaction was further allowed to proceed for 1 hour. After completion of the reaction, 50 g of water was added, and the organic layer was separated, whereby 203.9 g of crude 4-bromothioanisole was obtained. The purity of the thus-obtained crude 4-bromothioanisole was 90.5% as determined by gas chromatography.

Provenance & Evidence