TECHNOLOGY FOCUS - ELECTRONICS - Preferred Property: The organic electroluminescent element emits blue light.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): A halide e.g. 4-bromobiphenyl and compound which produces amino group, e.g. acetamide are reacted to obtain an intermediate (A). An intermediate (B) obtained using boron oxide is reacted with the intermediate (A) to obtain the aromatic amine derivative. Preferred Structure: The organic thin film layer has hole transport layer and/or positive hole injection layer containing the aromatic amine derivative. The light emitting layer further contains styryl amine compound and/or aryl amine compound. The hole transport layer and/or positive hole injection layer touching the anode contains acceptor material. Preferred Compound: The compound (I) is chosen from formulae (II), (III), (IV), of formula: N(-Ar3)(-Ar4)-Ar5 (V) and N(-Ar6)(-Ar7)-L3-N(-Ar8)(-Ar9) (VI).at least one of Ar3-Ar5, Ar6-Ar9, Ar10-Ar14, Ar15-Ar20, Ar21-Ar26=group of formula (i);andL3-L14=L2. Preferred Definitions:    L1=9,9-dimethylphenylene, biphenylene or fluorenylene;    R15-R19=L1;    R20,R21=1-10C alkyl or 3-10C cycloalkyl;    adjacent R15-R19=optionally saturated ring;    o,p,q=0-4;    r,s=0-3;and    L2=single bond.    SPECIFIC COMPOUNDS - 28 Aromatic amine derivatives are disclosed, e.g. bis(biphenyl)-(dibenzofuranyl)carbazolyl-biphenylamine of formula (A), bis(biphenyl)-bis(dibenzofuranyl)carbazolyl-biphenylamine, bis(terphenyl)-(dibenzofuranyl)carbazolyl-biphenylamine, bis-biphenyl-4-yl-(4-(3-(4-dibenzofuran-2-yl-phenyl)-carbazol-9-yl)-phenyl)-amine and bis-biphenyl-4-yl-(4-(8-(4-carbazol -9-yl-phenyl)-dibenzofuran-2-yl)-phenyl)-amine.    EXAMPLE - (In g) benzamide (17), 4-bromophenyl (68.8), copper iodide (2.7), potassium carbonate (40.8) and diethylbenzene were reacted at 175 degrees C for 19 hours. Tap water was added to the reaction mixture and the reaction mixture was filtered. The filtered mixture was washed with acetone, methanol and water to obtain a benzamide compound (55). The benzamide compound (55), potassium hydroxide (26.3), tap water (25 ml) and diethylbenzene were reacted at 175 degrees C for 5.5 hours, and filtered. The filtered mixture was washed and purified to obtain an intermediate (A) (25.0). 9-(4'-Bromo-biphenyl-4-yl)-3-dibenzofuran-4-yl-9H-carbazole, the intermediate (A), t-butoxy sodium (1.3), tris(dibenzylidene acetone)dipalladium (46 mg), tri-t-butyl phosphine (21 mg) and spin dried toluene (50 ml) were reacted at 80 degrees C for 8 hours. Water (500 ml) was added and cerite filtration of the mixture was carried out. The filtrate was extracted with toluene and dried to obtain bis(biphenyl)-bis(dibenzofuranyl)carbazolyl-biphenylamine (4.4).