1: pyrene; 1,3-dibromo-5,5-dimethyl-hydantoin in dichloromethane T=20°C; 1 h; 2: 4,4'-dimethyldiphenylamine With tri-tert-butyl phosphine; palladium diacetate; caesium carbonate in o-xylene T=120°C; Buchwald-Hartwig Coupling; 48 h; Overall yield = 73 percent;