triethylamine; tetrakis(triphenylphosphine) palladium(0) in 1,4-dioxane T=80°C; 3 h;

aluminium trichloride T=23°C; Friedel-Crafts acylation; 4 h;

1: 3-amino-phenol With potassium carbonate in N,N-dimethyl-formamide; toluene Dean-Stark trapReflux; 2: 1,3-bis(4'-fluorobenzoyl)benzene in N,N-dimethyl-formamide; toluene T=130 - 150°C; Inert atmosphere;