TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I) comprises converting an aryl compound of formulae (IIa) or (IIb) to (I).E2=precursor of X2;E3=precursor of X3;E4=precursor of X4; andE5=precursor of X5.Preferred Components: (I) comprises 56 heteroaryl compounds, e.g. heteroaryl compounds of formulae (III)-(XII). Preferred Definitions:    X4, X5=N.    SPECIFIC COMPOUNDS - 32 compounds (I) are disclosed, e.g. 5,8-di(biphenyl-4-yl)-13,13-dimethyl-8,13-dihydro-5H-indolo(3,2-a)acridine (Ia), 13,13-dimethyl-5,8-diphenyl-8,13-dihydro-5H-indolo(3,2-a)acridine, 5,8-di(biphenyl-4-yl)-13,13-dimethyl-8,13-dihydro-5H-benzo(b)indolo(3,2-f)(1,7)naphthyridine, 5,8-di(biphenyl-4-yl)-13,13-dimethyl-8,13-dihydro-5H-benzo(b)indolo(3,2-f)(1,8)naphthyridine,13,13-dimethyl-5,8-diphenyl-8,13-dihydro-5H-benzo(b)indolo(3,2-f)(1,7)naphthyridine.    EXAMPLE - Di-tert-butyl-dicarbonate (147.12 g) was dissolved in degassed tetrahydrofuran (1000 ml), and 3-bromo-9H-carbazole (118.5 g) and 4-dimethylaminopyridine (5.94 g) were added. The reaction mixture was heated slowly under reflux. The cooled reaction solution was carefully poured into water and extracted with methylene chloride and dried to obtain 3-bromo-carbazol-9-carboxylic acid tert-butyl ester. Then 3-bromo-carbazol-9-carboxylic acid tert-butyl ester (3.4 g) with methyl anthranilate (39ml) were dissolved in dry toluene (1200 ml) and mixed with tris-tert-butylphosphine (27.4 ml). The solution was mixed with cesium carbonate (103.2 g) and palladium(II) acetate (3.28 g) and heated for about 2.5 hours under reflux. The cooled mixture was filtered through silica gel and evaporated, after the complete conversion. The resulting oil was mixed with methanol and stirred for 3 minutes at 50 degrees C. The precipitate was washed several times to obtain 3-(2-methoxycarbonyl-phenylamino)-carbazol-9-carboxylic acid tert-butyl ester. The resulting 3-(2-methoxycarbonyl-phenylamino)-carbazol-9-carboxylic acid tert-butyl ester (80.5 g) (193.3 mmole) was dissolved in dichloromethane (600 ml) and anisole (4.2 ml). Then trifluoroacetic acid (15.7 ml) was slowly added to the reaction mixture at room temperature and the reaction mixture was heated to 40 degrees C. The reaction mixture was worked up to obtain 2-(9H-carbazol-3-ylamino)-benzoic acid methyl ester. The resulting 2-(9H-carbazol-3-ylamino)-benzoic acid methyl ester (43.9 g) was dissolved in dry tetrahydrofuran and cooled to -78 degrees C. Then methyllithium (315.4 ml) (2.2 M in diethyl ether) was added. The reaction mixture was worked up to obtain 2-(2-(9H-carbazol-3-ylamino)-phenyl)-propan-2-ol. The resulting 2-(2-(9H-carbazol-3-ylamino)-phenyl)-propan-2-ol (42.6 g) was dissolved in dichloromethane (1000 ml) and cooled to -5 degrees C. Then a mixture of methanesulfonic acid (87.4 ml) and polyphosphoric acid (118.8 g) was added at -5 degrees C. The reaction mixture was worked up to obtain 13,13-dimethyl-8,13-dihydro-5H-naphtho(2,3-c)carbazole. The resulting 13,13-dimethyl-8,13-dihydro-5H-naphtho(2,3-c)carbazole (15 g) was dissolved in degassed toluene and mixed with 4-bromobiphenyl (29.2 g). The reaction mixture was them mixed with tri-tert-butylphosphine (3.5 ml), palladium(II) acetate (0.45 g) and sodium tert-butoxide (14.4 g). The reaction mixture was heated for 4 hours under reflux, and again treated with 4-bromobiphenyl. Subsequently the reaction mixture was cooled and mixed with water to obtain di(biphenyl-4-yl)-13,13-dimethyl-8,13-dihydro-5H-indolo(3,2-a)acridine.