TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The catalyst is bis(triphenylphosphine)palladium dichloride or tetrakis(triphenylphosphine)palladium, and/or organopalladium and organophosphine ligand. The organopalladium is palladium acetate or tris(dibenzylideneacetone)dipalladium. The organophosphine ligand is tri-o-tolylphosphine or 2-dicyclohexylphosphino-2',6'-dimethoxy-biphenyl. The molar amount of the organophosphine ligand is 4-8 times the molar amount of the organopalladium. The molar ratio of the catalyst to (II) is 1:20-1:100. The alkaline solution is sodium carbonate solution, potassium carbonate solution or sodium bicarbonate solution. In the alkali solution, the molar amount of alkali solute is 20 times molar amount of (II).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I) comprises adding substituted dialkoxy 1,4-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzene compounds of formula (II) and substituted 5,8-dibromo-quinoxaline compounds of formula (III) at molar ratio of 1:1-1.2 to a catalyst and alkali solution dissolved organic solvent under anaerobic conditions, performing Suzuki coupling reaction at 70-130 degrees C for 12-96 hours, and then separating and purifying the reaction solution to obtain (I). Preferred Method: The Suzuki coupling reaction is performed at 90-120 degrees C for 24-72 hours. The separation and purification of the reaction solution includes adding methanol to the reaction solution, precipitating, then filtering through a Soxhlet extractor, extracting with methanol and n-hexane, collecting an organic phase, extracting the organic phase to colorless using chloroform as solvent, collecting chloroform solution and spin drying, and then vacuum drying for 24 hours at 50 degrees C to obtain (I). Preferred Components: The organic solvent is toluene, N,N-dimethylformamide or tetrahydrofuran. Preferred Definitions:    R1 = octyl, methyl, icosanyl, butyl or dodecyl; and    R2 = octyl, icosanyl, methyl, decyl or hexyl.