TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The preparation of (I), (II), (III) or (IV), comprises (a) synthesizing skeletal structure, which is linked only by bridge Y1; (b) introducing second and optionally third group Y1, by intramolecular ring-closure reaction; and (c) optionally introducing the residue R. Preferred Components: The compounds (I), (I), (II), (III) or (IV) comprises heterocyclic compounds of formulae (V)-(X). The compound (I) is e.g. substituted pyridine derivative of formula (XI)-(XV), where (II) and (III) are (XI)-(XV), in which at least two units, which may be identical or different, is linked with each other through a bivalent group L, which is respectively bonded to group X in para position instead of substituent R, or (IV) is (XI)-(XV), in which respectively two units, which may be identical or different, is linked with each other through a spiro-carbon atom that is present instead of the group Y 1, and in (XIV) and (XV), the unsubstituted positions carry a deuterium atom instead of hydrogen atom. Preferred Definitions:    R (preferred), R 1,=-N(A1) 2, carbazole derivatives, indenocarbazole derivatives, indolocarbazole derivatives, azacarbazole derivatives, indole derivatives, furan derivatives, benzofuran derivatives, dibenzofuran derivatives, thiophene derivatives, benzothiophene derivatives or dibenzothiophene derivatives (all optionally substituted by at least one R 2);    X=N (preferred) or P; and    Y 1=C(R) 2, NR, O, S, C=O or chemical bond.    SPECIFIC COMPOUNDS - 259 Compounds (I) are disclosed e.g. 5,5,9,9-tetramethyl-5H,9H-2,13b-diaza-naphtho(3,2,1-de)anthracene (Ia), 5,5,9,9-tetramethyl-5H,9H-3,13b-diaza-naphtho(3,2,1-de)anthracene, 5,5,9,9-tetramethyl-5H,9H-1,13b-diaza-naphtho(3,2,1-de)anthracene, 5,5,9,9-tetramethyl-5H,9H-2,4,13b-triaza-naphtho(3,2,1-de)anthracene and 5,5,9,9-tetramethyl-5H,9H-1,4,13b-triaza-naphtho(3,2,1-de)anthracene.    EXAMPLE - Mixture of 5H-pyrido(4,3-b)indole (16.8 g), 2-iodobenzoic acid methyl ester (28.8 g), potassium carbonate (34.6 g), copper powder (6.4 g) and glass beads of 3 mm diameter (100 g) in dimethylformamide (300 ml) was stirred for 24 hours at 130 C. After cooling, the reaction mixture was filtered, washed with dimethylformamide and separated in vacuum. Then the residue was worked up to obtain 2-pyrido(4,3-b)indole-5-yl-benzoic acid methyl ester. Then anhydrous cerium(III) chloride (14.8 g) was provided with tetrahydrofuran (500 ml) under ice cool condition. This mixture was stirred for 5 hours at room temperature and then a solution of 2-pyrido(4,3-b)indole-5-yl-benzoic acid methyl ester (15.1 g) in tetrahydrofuran (100 ml) was added dropwise. Then the reaction mixture was cooled to -5 C, and methyl magnesium bromide (150 ml) (1 N solution) in tetrahydrofuran was added dropwise, and the reaction mixture was stirred for 30 minutes and warmed to room temperature after stirring. Then the reaction mixture was cooled again to -5 C and excess of Grignard reagent was quenched by dropwise addition of methanol (100 ml). Then the reaction mixture was worked up to obtain 2-(2-pyrido(4,3-b)indole-5-yl-phenyl)-propan-2-ol. Then a mixture of methanesulfonic acid (15 ml) and polyphosphoric acid (15 g) was homogenized by stirring for 24 hours at room temperature. This mixture was then cooled to -20 C for 30 minutes, and well stirred solution of 2-(2-pyrido(4,3-b)indole-5-yl-phenyl)-propan-2-ol (9.1 g) in dichloromethane (300 ml) was added dropwise to it. Then the reaction mixture was stirred for 1 hour at -20 C and removed from the cold bath. Then the reaction mixture was slowly heated to room temperature, stirred for 1 hour at room temperature and then poured to ice (500 g). Then the reaction mixture was worked up to obtain 8,8-dimethyl-8H-3,12b-diaza-benzo(a)aceanthrylene.