How is 7-bromo-1H-indene (CAS: 16657-07-1) typically synthesized?

7-Bromo-1H-indene is typically synthesized through bromination of 1H-indene in the presence of a Lewis acid catalyst such as aluminum chloride. The reaction involves the electrophilic bromination of the indene ring, followed by quenching with a base. The yield can vary depending on the conditions, but a yield of about 80% can be achieved under optimal conditions. The reaction is exothermic, so temperature control is important.