TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I), comprises carrying out condensation reaction between at least one amino group and at least one carbonyl or carboxyl functional group to form a heterocyclic ring. Preferred Components: (I) comprises 32 compounds e.g. substituted imidazo(1,2-a)quinazoline derivative of formula (IIIa)-(IIIj).X = CR3 (preferred) or N. SPECIFIC COMPOUNDS - 21 Compounds (I) are disclosed e.g. 9,20,26-trifluoro-4,19,21-triazadecacyclo(21.10.2.2(10,13).0(2,22).0(3,19).0(5,18).0(6,11).0(12,17).0(27,35).0(30,34))heptatriaconta-1(33),2(22),3,5(18),6,8,10,12(17),13,15,20,23,25,27(35),28,30(34),31,36-octadecaene of formula (Ia), (2-(4-carbazol-9-yl-phenyl)-2H-1,3a,5-triaza-cyclopenta(a)anthracen-4-yl)-(9,9-dimethyl-9H-fluoren-2-yl)-phenyl-amine, 16-methyl-19,21-bis(phenanthren-9-yl)-15,17,25-triazahexacyclo(12.11.0.02,7.08,13.015,24.018,23)pentacosa-1(14),2,4,6,8,10,12,16,18,20,22,24-dodecaene, 13-(1,9-dihydro-pyren-1-yl)-6-pyrrolidin-1-yl-5,6a,11-triaza-indeno(2,1-a)phenanthrene and 7,9-di-phenanthren-9-yl-2-pyridin-2-yl-4,5-dihydro-3H-1,6,10c-triaza-aceanthrylene.    EXAMPLE - Water (4000 ml) and o-phenylenediamine (648 g) were provided and cyanogen chloride (369 g) was added to them dropwise with stirring in the cooling bath within 15 minutes. Then 45% sodium hydroxide having a pH of 9 (550 g) was added to the reaction mixture with stirring and the reaction mixture was cooled to 15 degrees C. Then the reaction mixture was worked up to obtain 2-aminobenzimidazole. Then the obtained 2-aminobenzimidazole (22 g) and 2,6-dibromobenzoic acid (44.8 g) in N,N-dimethylformamide (500 ml) with anhydrous potassium carbonate (27 g), Ullmann copper (0.8 g) and potassium iodide (0.01 g) were stirred for 5 hours under reflux. After cooling, the reaction mixture was worked up to obtain 4-bromo-7H-6,7,11b-triaza-benzo(c)fluoren-5-one. Then sodium borohydride (5 g) stirred at room temperature was added to the solution of 4-bromo-7H-6,7,11b-triaza-benzo(c)fluoren-5-one (78.5 g) in ethanol (2000 ml). Then the reaction mixture was heated for 15 minutes under reflux and allowed to cool to room temperature. Then the reaction mixture was worked up to obtain 4-bromo-6,7,11b-triaza-benzo(c)fluorene. Then 4-bromo-6,7,11b-triaza-benzo(c)fluorene (110.3 g), boronic acid ester (187.1 g) and potassium phosphate (165.5 g) were provided and toluene (1000 ml), water (1000 ml) and dioxane (415 ml) were added to it. Then the mixture was degassed for 30 minutes under stirring. Then phosphine (6.8 g) was added, stirred and then palladium(II) acetate (833 mg) was added to the reaction mixture. Then the mixture was refluxed in oil bath at 120 degrees C for 24 hours. After cooling, the reaction mixture was worked up to obtain 4-(4-(10-phenyl-anthracene-9-yl)-phenyl)-6,7,11b-triaza-benzo(c)fluorene.