反应详情

4′-Bromo-biphenyl sulfonic acid (5 g) was refluxed in thionyl chloride (30 mL) with a catalytic quantity of DMF (0.5 mL) for 4 hours. Toluene was added and the solvents evaporated under vacuum. The residue collected was recrystallised from petrol/ethyl acetate to give the title compound as large colourless crystals.

1. customthe solvents evaporated under vacuum
2. customThe residue collected
3. customwas recrystallised from petrol/ethyl acetate