TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Disclosed): Tetrabenzoyl ethane derivative of formula (II), aromatic amine compound or heteroaromatic compound e.g. para toluidine and m-bromo aniline are dissolved in solvent, and reacted in the presence of acidic catalyst e.g. p-toluene sulfonic acid to obtain pyrrolepyridine compound (I). Preferred Element: The organic electroluminescent element has an anode (2), a positive hole transport layer, a light emitting layer (4), an electron carrying layer and a cathode (6). The light emitting layer contains pyrrolopyridine compound as a dopant, and positive hole transport substance and electron carrying substance as a host. SPECIFIC COMPOUNDS - 82 Pyrrolopyridine compounds (I) are disclosed e.g. 2-(4-methylphenyl)-1,3,4,7-tetraphenyl-2H-pyrrolo(3,4-c)pyridine-6-carbonitrile of formula (Ia), 2-(4-methoxyphenyl)-1,3,4,7-tetraphenyl-2H-pyrrolo(3,4-c)pyridine-6-carbonitrile, 2-(4-(dimethylamino)phenyl)-1,3,4,7-tetraphenyl-2H-pyrrolo(3,4-c)pyridine-6-carbonitrile, 4,7-bis(3-(dimethylamino)phenyl)-2-(4-(dimethylamino)phenyl)-1,3-diphenyl-2H-pyrrolo(3,4-c)pyridine-6-carbonitrile and 2-(4-butoxyphenyl)-3-(4-methoxyphenyl)-1,4,7-triphenyl-2H-pyrrolo(3,4-c)pyridine-6-carbonitrile.    EXAMPLE - Acetic acid (30 ml), 2,3-dibenzoyl-1,4-diphenylbutane-1,4-dione (2), para toluidine (1.42), and p-toluenesulfonic acid (30 mg) were added to reaction container, heated and refluxed for 24 hours. Para toluidine (1.42) was added, heat-refluxed, reacted and annealed. The reaction product was crystallized, and N-(p-methylphenyl)-2,5-diphenyl-3,4-di-benzoyl pyrrole was obtained. The obtained compound (0.8) and amino acetonitrile (0.45) were added to n-butanol, heated and refluxed for 48 hours. Amino acetonitrile (0.45) was added and reacted. The precipitate was filtered, washed with water, dissolved in tetrahydrofuran (THF), activated carbon was added and heated, impurity was removed, and THF was distilled off. The obtained crude crystal was recrystallized with n-butanol, yellow-needle shaped crystal of 6-cyano-2-N-(p-methylphenyl)-1,3,4,7-tetraphenyl pyrrolo (3,4-c) pyridine was obtained.