TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): A dioxaborolane-containing compound of formula (A) is reacted with bromine-containing compound of formula: Br-(L1)x-L2-L3-Ar1, to obtain naphthalene-containing organic electroluminescent compound (I). Preferred Compound: The organic layer comprises arylamine compound and/or styrylarylamine compound, and further comprises metal(s) chosen from organic metals of group I, group II, 4th period and 5th period transition metals, lanthanide metals and d-transition elements. The organic light-emitting diode is an organic display comprising the organic electroluminescent compound(s) and a compound having an electroluminescent peak of wavelength of 560 nm or more. Preferred Layer: The organic layer comprises both an electroluminescent layer and a charge generating layer. A mixed region of reductive dopant and organic substance, or a mixed region of oxidative dopant and organic substance is placed on the inner surface of one or both electrode(s). Full Definitions:    L1=6-60C arylene or 3-60C heteroarylene containing heteroatom(s) chosen from N, O and S, or bivalent group of formula (a-c);    L2,L3=chemical bond, 1-60C alkyleneoxy, 1-60C alkylenethio, 6-60C aryleneoxy, 6-60C arylenethio, 6-60C arylene or 3-60C heteroarylene containing heteroatom(s);    Ar1=NR41R42, 6-60C aryl, 3-60C heteroaryl containing heteroatom(s), 5-or 6-membered heterocycloalkyl containing heteroatom(s), 3-60C cycloalkyl, adamantyl, 7-60C bicycloalkyl, or substituent of formula (d-g);    R1-R11,R21-R31,R41,R42,R51-R62,R71-R85=H, deuterium, halo, 1-60C alkyl, 6-60C aryl, 3-60C heteroaryl containing heteroatom(s), morpholino, thiomorpholino, 5- or 6-membered heterocycloalkyl containing heteroatom(s), 3-60C cycloalkyl, tri(1-60C)alkylsilyl, di(1-60C)alkyl(6-60C)arylsilyl, tri(6-60C)arylsilyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, cyano, 1-60C alkylamino, 6-60C arylamino, (6-60C)ar(1-60C)alkyl, 1-60C alkyloxy, 1-60C alkylthio, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, 1-60C alkylcarbonyl, 6-60C arylcarbonyl, carboxy, nitro or hydroxy, or R1-R11, R21-R31, R41,R42, R51-R62, R71 and R72, R74 and R75, R79 and R80, R81 and R82, or R84 and R85 may be linked to an adjacent substituent through 3-60C alkylene or 3-60C alkenylene optionally having fused ring to form an alicyclic ring, or a monocyclic or polycyclic aromatic ring;    X,Y'=chemical bond, -(CR71R72)m-, -N(R73)-, -S-, -O-, -Si(R74)(R75)-, -P(R76), -C(=O)-, -B(R77)-, -In(R78)-, -Se-, -Ge(R79)(R80)-, -Sn(R81)(R82)-, -Ga(R83)- or -(R84)C=C(R85)-;and    m,x=1-4.    Where arylene or heteroarylene of L1-L3, aryl or heteroaryl of Ar1, or alkyl, aryl, heteroaryl, heterocycloalkyl, cycloalkyl, trialkylsilyl, dialkylarylsilyl, triarylsilyl, alkenyl, alkynyl, alkylamino or arylamino of R1-R11, R21-R31, R41, R42, R51-R62, and R71-R85 may further substituted by substituent(s) chosen from deuterium, halo, 1-60C alkyl, halo(1-60C)alkyl, 6-60C aryl, 3-60C heteroaryl containing heteroatom(s) optionally substituted by 6-60C aryl, morpholino, thiomorpholino, 5- or 6-membered heterocycloalkyl containing heteroatom(s), 3-60C cycloalkyl, tri(1-60C)alkylsilyl, di(1-60C)alkyl(6-60C)arylsilyl, tri(6-60C)arylsilyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, cyano, 1-60C alkylamino, 6-60C arylamino, (6-60C)ar(1-60C)alkyl, 1-60C alkyloxy, 1-60C alkylthio, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, 1-60C alkylcarbonyl, 6-60C arylcarbonyl, carboxy, nitro, hydroxy or group of formula (d-f). Preferred Definitions:    L1=group chosen from 32 cyclic groups e.g. group of formula (1-5), preferably chosen from 40 cyclic groups e.g. group of formula (6-10);    X,Y'=-(CR71R72)m-, -N(R73)-, -S-, -O-, -Si(R74)(R75)-, -P(R76)- or -(R84)C=C(R85)-;    R91-R99,R203-R215=H, deuterium, halo, 1-60C alkyl, 6-60C aryl, 3-60C heteroaryl containing heteroatom(s), morpholino, thiomorpholino, 5- or 6-membered heterocycloalkyl containing heteroatom(s), 3-60C cycloalkyl, tri(1-60C)alkylsilyl, di(1-60C)alkyl(6-60C)arylsilyl, tri(6-60C)arylsilyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, cyano, 1-60C alkylamino, 6-60C arylamino, (6-60C)ar(1-60C)alkyl, 1-60C alkyloxy, 1-60C alkylthio, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, 1-60C alkylcarbonyl, 6-60C arylcarbonyl, carboxy, nitro or hydroxy, or R91-R99 may be linked through 3-60C alkylene or 3-60C alkenylene optionally having fused ring to form alicyclic ring, or monocyclic or polycyclic aromatic ring, and alkyl, aryl, heteroaryl, heterocycloalkyl, cycloalkyl, trialkylsilyl, dialkylarylsilyl, triarylsilyl, alkenyl, alkynyl, alkylamino or arylamino of R203-R215 may further substituted by substituent(s) chosen from deuterium, halo, 1-60C alkyl, halo(1-60C)alkyl, 6-60C aryl, 3-60C heteroaryl containing heteroatom(s) optionally substituted by 6-60C aryl, morpholino, thiomorpholino, 5- or 6-membered heterocycloalkyl containing heteroatom(s), 3-60C cycloalkyl, tri(1-60C)alkylsilyl, di(1-60C)alkyl(6-60C)arylsilyl, tri(6-60C)arylsilyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, cyano, 1-60C alkylamino, 6-60C arylamino, (6-60C)ar(1-60C)alkyl, 1-60C alkyloxy, 1-60C alkylthio, (6-60C)aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, 1-60C alkylcarbonyl, 6-60C arylcarbonyl, carboxy, nitro or hydroxy;    R121-R131=H, deuterium, 1-60C alkyl or 6-60C aryl, where alkyl or aryl may further substituted by substituent(s) chosen from deuterium, halo, 1-60C alkyl, halo(1-60C)alkyl, 6-60C aryl, 3-60C heteroaryl containing heteroatom(s), morpholino, thiomorpholino, 5- or 6-membered heterocycloalkyl containing heteroatom(s), 3-60C cycloalkyl, tri(1-60C)alkylsilyl, di(1-60C)alkyl(6-60C)arylsilyl, tri(6-60C)arylsilyl, adamantyl, 7-60C bicycloalkyl, 2-60C alkenyl, 2-60C alkynyl, cyano, 1-60C alkylamino, 6-60C arylamino, (6-60C)ar(1-60C)alkyl, 1-60C alkyloxy, 1-60C alkylthio, 6-60C aryloxy, 6-60C arylthio, 1-60C alkoxycarbonyl, 1-60C alkylcarbonyl, 6-60C arylcarbonyl, carboxy, nitro or hydroxy;    -L2-L3-Ar1=group chosen from 43 cyclic groups e.g. group of formula (11-15), preferably chosen from 202 cyclic groups e.g. group of formula (16-20);and    R1-R11=H, deuterium, fluoro, chloro, methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, t-butyl, n-pentyl, i-pentyl, n-hexyl, n-heptyl, n-octyl, 2-ethylhexyl, n-nonyl, decyl, dodecyl, hexadecyl, benzyl, trifluoromethyl, perfluoroethyl, trifluoroethyl, perfluoropropyl, perfluorobutyl, methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, i-butoxy, t-butoxy, n-pentoxy, i-pentoxy, n-hexyloxy, n-heptyloxy, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, morpholino, thiomorpholino, morpholinyl, thiomorpholinyl, trimethylsilyl, triethylsilyl, tripropylsilyl, tri(t-butyl)silyl, t-butyldimethylsilyl, dimethylphenylsilyl, triphenylsilyl, bicycle(2.2.1)heptyl, bicycle(2.2.2)octyl, bicycle(5.2.0)nonyl, bicycle(4.2.2)decyl4-pentylbicycle(2.2.2)octyl, ethenyl, phenylethenyl, ethynyl, phenylethynyl, cyano, methylthio, phenyloxy, phenylthio, methoxycarbonyl, ethoxycarbonyl, t-butoxycarbonyl, methylcarbonyl, ethylcarbonyl, benzylcarbonyl, phenylcarbonyl, carboxy, nitro or hydroxy.    SPECIFIC COMPOUNDS - 939 Naphthalene-containing organic electroluminescent compounds such as 2-phenyl-7-(3-phenylnaphthalen-2-yl)-4a,10a-dihydrophenanthrene of formula (1a), 2-(naphthalen-1-yl)-7-(3-phenylnaphthalen-2-yl)phenanthrene, 2-(naphthalen-2-yl)-7-(3-phenylnaphthalen-2-yl)-4a,10a-dihydrophenanthrene, 2-(4-methylphenyl)-7-(3-phenylnaphthalen-2-yl)-4a,10a-dihydrophenanthrene, and 2-(9,9-dimethyl-9H-fluoren-2-yl)-7-(3-phenylnaphthalen-2-yl)-4a,10a-dihydrophenanthrene, are disclosed.    EXAMPLE - 2-Bromo-7-(naphthalen-1-yl)phenanthrene (in g) (4.6), 4,4,5,5-tetramethyl-2-(3-phenylnaphthalen-2-yl)-1,3,2-dioxaborolane (4.8), 2M potassium carbonate solution (18 mL) and tetrakis(triphenylphosphine)palladium (0.7) were added to toluene (100 mL). Further, Aliquat 336 (RTM: water insoluble quaternary ammonium salt) (0.1 mL) was added to the resulting mixture and stirred under reflux at 80 degrees C for 12 hours. The resulting product was washed using distilled water and ethylacetate, and purified using column chromatography, to obtain 2-(naphthalen-1-yl)-7-(3-phenylnaphthalen-2-yl)phenanthrene (3.2).