Patent ID: 8703302

Claim:
A compound for organic electroluminescent device represented by the following general formula (1): wherein ring a is an aromatic or heterocyclic ring fused to two adjacent rings and represented by formula (a1) or (a2), ring a′ is an aromatic or heterocyclic ring fused to three adjacent rings and represented by formula (a1), and ring b is a heterocyclic ring fused to two adjacent rings and represented by formula (b1); X is independently CR or N; Ar 1 to Ar 6 each is independently a substituted or unsubstituted aromatic hydrocarbon or aromatic heterocyclic group; R and R 1 to R 7 each is independently hydrogen, an alkyl group, an aralkyl group, an alkenyl group, an alkynyl group, a cyano group, a dialkylamino group, a diarylamino group, diaralkylamino group, an amino group, a nitro group, an acyl group, an alkoxycarbonyl group, a carboxyl group, an alkoxyl group, an alkylsulfonyl group, a haloalkyl group, a hydroxyl group, an amide group, or a substituted or unsubstituted aromatic hydrocarbon or aromatic heterocyclic group, and in the case where any two of the foregoing are located adjacent to each other, R and R 1 to R 7 are optionally linked to form a fused ring; L 1 to L 3 each is independently a direct bond or a linking group constituted of a substituted or unsubstituted aromatic heterocyclic group; and n is independently an integer of 0 or 1.