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With tris-(dibenzylideneacetone)dipalladium(0); sodium t-butanolate; tri tert-butylphosphoniumtetrafluoroborate; In toluene; for 10h;Inert atmosphere; Reflux;
Under an argon atmosphere,4.1 g of Intermediate A, 3.6 g of 3,9'-bicarbazole,10 mg of tris (dibenzylideneacetone) dipalladium (0), 12 mg of tri-t-butylphosphonium tetrafluoroborate, 2.88 g of sodium t-butoxide,And 100 mL of toluene were charged in a flask,And heated to reflux for 10 hours. After heating under reflux,After cooling to room temperature, the reaction solution was extracted with toluene.The obtained organic layer was dried and concentrated.The obtained residue was purified by column chromatography to obtain 3.5 g of Compound 1.The yield of Compound 1 isIt was 53%.