How is 9-Bromo-3-(bromoacetyl)-10,11-dihydro-5H-dibenzo[c,g]chromen-8(9H)-one (CAS: 1438383-89-1) typically synthesized?

9-Bromo-3-(bromoacetyl)-10,11-dihydro-5H-dibenzo[c,g]chromen-8(9H)-one can be synthesized through a series of reactions starting from a 1,2-dibromonaphthalene derivative. The process involves bromination, acetylation, and subsequent cyclization steps. Common solvents include dichloromethane and acetic anhydride, and the reaction is typically carried out under basic conditions using catalysts like pyridine. The overall yield is moderate, around 50-60%.