TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): A halogenated aryl substituted quinoxaline compound of formula (I) and diarylamine of formula: Ar1-NH-Ar2 (II) are coupled using metallic compound such as palladium catalyst or monovalent copper, or copper in presence of base such as potassium carbonate, to obtain quinoxaline derivative (1).X1=bromine, iodine, or chlorine.Preferred Compound: The quinoxaline derivative (1) is of formulae (2-7).D2=arylene group which is not 6-25C condensed ring;R21-R25=H, 1-4C alkyl, or aryl group that is not (un)substituted by 6-25 carbon atoms;D3=phenylene, biphenyl-diyl, or fluorene diyl group;R31-R35=H, 1-4C alkyl, (un)substituted phenyl, (un)substituted biphenyl, or (un)substituted fluorene group;D4=phenylene, or biphenyl-diyl;R41-R45,R1-R5=H, 1-4C alkyl, (un)substituted phenyl, or (un)substituted biphenyl;A,B'=H or phenyl;andR'=(un)substituted phenyl, or (un)substituted biphenyl. SPECIFIC COMPOUNDS - 159 quinoxaline derivatives such as biphenyl-4-yl-phenyl-(4-(3-phenyl-quinoxalin-2-yl)-phenyl)-amine of formula (A), and bis-biphenyl-4-yl-(4-(3-phenyl-quinoxalin-2-yl)-phenyl)-amine, are claimed, and diphenyl-(4-(3-phenyl-quinoxalin-2-yl)-phenyl)-amine, biphenyl-3-yl-phenyl-(4-(3-phenyl-quinoxalin-2-yl)-phenyl)-amine, and biphenyl-2-yl-phenyl-(4-(3-phenyl-quinoxalin-2-yl)-phenyl)-amine, are disclosed.    EXAMPLE - 2-(4-Bromophenyl)-3-phenyl quinoxaline (in g) (1.5), sodium tert-butoxide (1), 4-phenyldiphenylamine (1), and bis(dibenzylidene acetone) palladium (0) (0.10) were added and mixed. Further, 10 weight% hexane solution (0.1 mL) of toluene (20 mL) and tri(tert-butyl)phosphine were added to the resulting mixture, and heat-stirred at 80 degrees C for 5 hours, and toluene and alumina were added and filtered. The obtained filtrate was washed using saturated sodium hydrogen carbonate aqueous solution and saturated salt solution, and separated into aqueous layer and organic layer. Then, magnesium sulfate was added to the organic layer and dried. The resulting mixture was suction-filtered, and magnesium sulfate was removed. The obtained filtrate was concentrated and recrystallized using mixed solvent of chloroform and hexyl, to obtain 2-(4-(N(biphenyl-4-yl)-N-phenylamino)phenyl)-3-phenyl quinoxaline (BPA1PQ) (1.2) having yield of 55%.