15.4 g (40 mmol) of diethyl 2-chloro-5-naphthalen-1-ylterephthalate, 14.0 g (56 mmol) of fluoranthene-3-boronic acid and 17.7 g of Cs2CO3 are initially introduced in 70 ml of dry dioxane and saturated with N2 for 30 min. 0.8 ml of a 1.0 M solution of tri-tert-butylphosphine in toluene, followed by 91 mg (0.4 mmol) of Pd(OAc)2 are then added. The mixture is heated at the boil for 4 h, extended with water and EtOH, the precipitate is filtered off with suction, washed with heptane and dried. The solid is recrystallised from toluene and then has, according to 1H-NMR, a purity of >95%. The yield is 8.5 g (38%) of colourless solid.
