反应详情

4′-Fluorobiphenyl sulfonic acid (3 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 to give the title compound as an amorphous solid.

1. customthe solvents evaporated under vacuum