How is 5-Bromo-1,3-benzodioxole (CAS: 2635-13-4) typically synthesized?

5-Bromo-1,3-benzodioxole can be synthesized via bromination of 1,3-benzodioxole using bromine in the presence of a catalyst such as N-phenyl-N'-(p-toluenesulfonyl)urea (PTSU). The reaction is typically carried out under anhydrous conditions, and the yield can be improved by careful control of the reaction conditions and the use of appropriate solvents. This method provides a high degree of selectivity and good yield.