TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): The star-shaped compound is prepared by bonding -(L-R) radical or synthesis precursors of -(L-R) radical to branching group K' via a Suzuki coupling, in which the -(L-R) radical or synthesis precursors of -(L-R) radical are present as organoboron compound and the branching group K' is present as aryl or heteroaryl halide, or the -(L-R) radical or synthesis precursors of -(L-R) radical are present as aryl or heteroaryl halide and the branching group K' is present as organoboron compound. Preferred Component: The organoboron compound is of formula (VI) or (VII). The aryl or heteroaryl halide is of formula Y'-L-R or K'-(Y')pY'=Cl, Br, I or -O-SO2-R6;R6=Me, CF3, phenyl or tolyl;o=3-6; andp=1-5. EXAMPLE - Degassed solutions of tris(4-bromophenyl)amine (1.26 g) and 2-(5'-(2-hexyl-1,3-dioxolan-2-yl)-2,2'-bithien-5-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (4.4 g) in toluene (60 ml), ethanol (10 ml) and aqueous 2 M sodium carbonate solution (14 ml) were added to tetrakis (triphenylphosphine) palladium (Pd(PPh3)4, 340 mg), and the mixture was boiled under reflux for 12 hours. When the reaction was complete, toluene (200 ml) and water (100 ml) containing 1 N hydrochloric acid solution (29 ml) were added. The organic phase was separated off, washed with water, and dried over sodium sulfate and filtered to obtain tris(4-(5'-(2-hexyl-1,3-dioxolan-2-yl)-2,2'-bithien-5-yl)phenyl) amine (A). A 1 M hydrochloric acid solution (5.5 ml) was added dropwise to a solution of (A) (2.2 g) in tetrahydrofuran (70 ml). After stirring the solution at room temperature for 2 hours, the solution was then heated under reflux for a further 2 hours to partly precipitate the product as a yellow powder. When the reaction had ended, the organic phase was separated off and washed with water and the product was filtered off to obtain 1,1',1"-(nitrilotris(4,1-phenylene-2,2'-bithiene-5',5-diyl))triheptan-1-one (B). Then, the obtained product (B) (1.78 g), malonic acid dinitrile (1.31 g) and anhydrous pyridine were stirred in a reaction vessel for 10 hours under microwave heating (105 degrees C). When the reaction was complete, the pyridine was removed in vacuum and the product was purified by chromatography with silica gel (eluent: toluene) to obtain pure product as a black powder 1.44 g (84% yield).