ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME

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

wherein

X and Y each independently represent, O or S;

L 1 represents a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene;

Ar 1 and Ar 2 each independently represent, a substituted or unsubstituted (CS-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted fused ring of (C3-C30) aliphatic ring and (C6-C30) aromatic ring, or -L 2 -N-(Ar 3 )(Ar 4 ); or may be linked to an adjacent substituent(s) to form a ring(s);

R 1 to R 4 each independently represent, hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, a substituted or unsubstituted (C3-C30)cycloalkyl, a substituted or unsubstituted (C1-C30)alkoxy, a substituted or unsubstituted tri(C1-C30)alkylsilyl, a substituted or unsubstituted di(C1-C30)alkyl(C6-C30)arylsilyl, a substituted or unsubstituted (C1-C30)alkyldi(C6-C30)arylsilyl, a substituted or unsubstituted tri(C6-C30)arylsilyl, or -L 3 -N-(Ar 5 )(Ar 6 ); or may be linked to an adjacent substituent(s) to form a ring(s);

L 2 and L 3 each independently represent, a single bond, a substituted or unsubstituted (C1-C30)alkylene, a substituted or unsubstituted (C6-C30)arylene, a substituted or unsubstituted (3- to 30-membered)heteroarylene, or a substituted or unsubstituted (C3-C30)cycloalkylene;

Ar 3 to Ar 6 each independently represent, a substituted or unsubstituted (C1-C30)alkyl, a substituted or unsubstituted (C2-C30)alkenyl, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted fused ring of (C3-C30) aliphatic ring and (C6-C30) aromatic ring, or a substituted or unsubstituted (3- to 30-membered)heteroaryl;

a to c each independently represent, an integer of 1 to 4, and d represents an integer of 1 to 3; and

when a to d each independently are an integer of 2 or more, each of R 1 to R 4 may be the same or different.

2 . The organic electroluminescent compound according to claim 1 , wherein the formula 1 is represented by any one of the following formulas 1-1 to 1-4:

wherein

R 1 to R 4 , X, Y, L 1 , Ar 1 , Ar 2 , and a to d each independently are as defined in claim 1 ,

3 . The organic electroluminescent compound according to claim 2 , wherein

L 1 represents a single bond or a substituted or unsubstituted (C6-C30)arylene;

Ar 1 and Ar 2 each independently represent, a substituted or unsubstituted (C6-C30)aryl, a substituted or unsubstituted (3- to 30-membered)heteroaryl, or a substituted or unsubstituted fused ring of (C3-C30) aliphatic ring and (C6-C30) aromatic ring.

4 . The organic electroluminescent compound according to claim 1 , wherein the substituents of the substituted alkyl, the substituted alkylene, the substituted alkenyl, the substituted aryl, the substituted arylene, the substituted heteroaryl, the substituted heteroarylene, the substituted cycloalkyl, the substituted cycloalkylene, the substituted alkoxy, the substituted trialkylsilyl, the substituted dialkylarylsilyl, the substituted alkyldiarylsilyl, the substituted triarylsilyl and the substituted fused ring of aliphatic ring and aromatic ring, each independently are at least one selected from the group consisting of deuterium; halogen; cyano; carboxyl; nitro; hydroxy; phosphine oxide; (C1-C30)alkyl; halo(C1-C30)alkyl; (C2-C30)alkenyl; (C2-C30)alkynyl: (C1-C30)alkoxy; (C1-C30)alkylthio: (C3-C30)cycloalkyl; (C3-C30)cycloalkenyl; (3- to 7-membered) heterocycloalkyl; (C6-C30)aryloxy; (C6-C30)arylthio: (5- to 50-membered)heteroaryl unsubstituted or substituted with at least one of (C1-C30)alkyl, (C6-C30)aryl and di(C6-C30)arylamino; (C6-C30)aryl unsubstituted or substituted with at least one of (C1-C30)alkyl, (3- to 50-membered)heteroaryl, and mono- or di- (C6-C30)arylamino: tri(C1-C30)alkylsilyl; tri(C6-C30)arylsilyl; di(C1-C30)alkyl(C6-C30)arylsilyl; (C1-C30)alkyldi(C6-C30)arylsilyl; amino; mono- or di- (C1-C30)alkylamino; mono- or di- (C2-C30)alkenylamino; mono- or di- (C6-C30)arylamino unsubstituted or substituted with at least one of (C1-C30)alkyl, (5- to 30-membered)heteroaryl and di(C6-C30)arylamino; mono- or di- (3- to 30-membered)heteroarylamino; (C1-C30)alkyl(C2-C30)alkenylamino; (C1-C30)alkyl(C6-C30)arylamino: (C1-C30)alkyl(3- to 30-membered)heteroarylamino; (C2-C30)alkenyl(C6-C30)arylamino; (C2-C30)alkenyl(3- to 30-membered)heteroarylamino; (C6-C30)aryl(3- to 30-membered)heteroarylamino; (C1-C30)alkylcarbonyl; (C1 -C30)alkoxycarbonyl; (C6-C30)arylcarbonyl; (C6-C30)arylphosphinyl; di(C6-C30)arylboronyl; di(C1-C30)alkylboronyl; (C1 -C30)alkyl(C6-C30)alylboronyl; (C6-C30)ar(C1 -C30)alkyl; and (C1 -C30)alkyl(C6-C30)aryl.

5 . The organic electroluminescent compound according to claim 1 , wherein the compound represented by the formula 1 is selected from the following compounds:

6 . An organic electroluminescent device comprising an organic electroluminescent compound according to claim 1 .

7 . The organic electroluminescent device according to claim 6 , wherein the organic electroluminescent compound is included in a hole transport zone.