To a reflux apparatus add 60 mL of cold water and slowly 115 mL of conc. sulfuric acid then start a quick addition of a mixture prepared from 80 mL of isopropyl alcohol and 130 g of very fine potassium bromide, reflux for 3h. Fraction distill the solution by collecting the range up to 95°C, dry over anhydrous calcium chloride and redistill.
The mixture after the distillation
The crude product
The pure product