1: 50 percent / copper bronze, potassium carbonate / 192 h / Heating 2: 1.) phenyllithium / 1.) ether, benzene, 0 deg C, 5 h, 2.) from -78 deg C to RT View Scheme

phenyllithium 1.) ether, benzene, 0 deg C, 5 h, 2.) from -78 deg C to RT; Yield given. Multistep reaction. Yields of byproduct given;