How is 9-(2'-Bromo-4-biphenylyl)-9H-carbazole (CAS: 1215228-57-1) typically synthesized?

9-(2'-Bromo-4-biphenylyl)-9H-carbazole is synthesized via a multistep process involving bromination of biphenyl followed by a coupling reaction with carbazole. Commonly, the reaction is carried out using a palladium catalyst under conditions of microwave heating to enhance selectivity and yield. The method typically achieves a yield of around 75-80%.