Organic electroluminescent compounds and organic electroluminescent device comprising the same

1. An organic electroluminescent compound represented by the following formula 1:

wherein

X 1 to X 8 represent N or CR 11 ;

R 1 to R 11 , each independently, represent hydrogen, deuterium, a halogen, a cyano, a carboxyl, a nitro, a hydroxyl, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, —NR 12 R 13 , or —SiR 14 R 15 R 16 ; or are linked to an adjacent substituent(s) to form a substituted or unsubstituted, mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur;

R 12 to R 16 , each independently, represent hydrogen, deuterium, a halogen, a cyano, a carboxyl, a nitro, a hydroxyl, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C3-C30)cycloalkenyl, a substituted or unsubstituted (3- to 7-membered)heterocycloalkyl, a substituted or unsubstituted (C6-C30)aryl, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

the heterocycloalkyl or the heteroaryl contains at least one hetero atom selected from B, N, O, S, Si, and P.

2. The organic electroluminescent compound according to claim 1 , wherein the substituents of the substituted (C1-C30)alkyl, the substituted (C3-C30)cycloalkyl, the substituted (C3-C30)cycloalkenyl, the substituted (3- to 7-membered) heterocycloalkyl, the substituted (C6-C30)aryl, the substituted (3- to 30-membered)heteroaryl, and the substituted mono- or polycyclic, (C3-C30) alicyclic or aromatic ring, each independently, are at least one selected from the group consisting of deuterium, a halogen, a cyano, a carboxyl, a nitro, a hydroxyl, a (C1-C30)alkyl, a halo(C1-C30)alkyl, a (C2-C30) alkenyl, a (C2-C30) alkynyl, a (C1-C30)alkoxy, a (C1-C30)alkylthio, a (C3-C30)cycloalkyl, a (C3-C30)cycloalkenyl, a (3- to 7-membered)heterocycloalkyl, a (C6-C30)aryloxy, a (C6-C30)arylthio, a (5- to 30-membered)heteroaryl unsubstituted or substituted with a (C6-C30)aryl, a (C6-C30)aryl unsubstituted or substituted with a (5- to 30-membered)heteroaryl, a tri(C1-C30)alkylsilyl, a tri(C6-C30)arylsilyl, a di(C1-C30)alkyl(C6-C30)arylsilyl, a (C1-C30)alkyldi(C6-C30)arylsilyl, an amino, a mono- or di-(C1-C30)alkylamino, a mono- or di-(C6-C30)arylamino, a (C1-C30)alkyl(C6-C30)arylamino, a (C1-C30)alkylcarbonyl, a (C1-C30)alkoxycarbonyl, a (C6-C30)arylcarbonyl, a di(C6-C30)arylboronyl, a di(C1-C30)alkylboronyl, a (C1-C30)alkyl(C6-C30)arylboronyl, a (C6-C30)aryl(C1-C30)alkyl, and a (C1-C30)alkyl(C6-C30)aryl.

3. The organic electroluminescent compound according to claim 1 , wherein R 1 to R 11 , each independently, represent hydrogen, deuterium, a substituted or unsubstituted (C1-C20)alkyl, a substituted or unsubstituted (C3-C20)cycloalkyl, a substituted or unsubstituted (C3-C20)cycloalkenyl, a substituted or unsubstituted (C6-C20)aryl, a substituted or unsubstituted (3- to 20-membered)heteroaryl, or —NR 12 R 13 ; or are linked to an adjacent substituent(s) to form a substituted or unsubstituted, mono- or polycyclic, (C3-C20) alicyclic or aromatic ring, whose carbon atom(s) may be replaced with at least one hetero atom selected from nitrogen, oxygen, and sulfur; and R 12 to R 16 , each independently, represent a substituted or unsubstituted (C1-C20)alkyl, a substituted or unsubstituted (C3-C20)cycloalkyl, a substituted or unsubstituted (C3-C20)cycloalkenyl, a substituted or unsubstituted (C6-C20)aryl, or a substituted or unsubstituted (3- to 20-membered)heteroaryl.

4. The organic electroluminescent compound according to claim 1 , wherein the compound represented by formula 1 is selected from the group consisting of:

5. An organic electroluminescent device comprising the organic electroluminescent compound according to claim 1 .