Compound, material for organic electroluminescent elements, organic electroluminescent element, and electronic device

1 . A compound of formula if formula (1):

wherein

R 1 to R 8 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms,

provided that one selected from R 1 to R 4 is a single bond bonding to *a,

adjacent two selected from R 1 to R 4 that are not a single bond and R 5 to R 8 do not bond to each other and therefore do not form a cyclic structure,

L 2 represents a single bond, a group of formula (10), or a group of formula (11);

wherein

R 21 to R 26 and R 31 to R 38 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms,

provided that:

one selected from R 21 to R 26 is a single bond bonding to one selected from R 1 to R 4 via *a, the other one selected from R 21 to R 26 is a single bond bonding to the benzene ring A,

one selected from R 31 to R 38 is a single bond bonding to one selected from R 1 to R 4 via *a, the other one selected from R 31 to R 38 is a single bond bonding to the benzene ring A,

adjacent two selected from R 21 to R 26 that are not a single bond do not bond to each other, and therefore do not form a cyclic structure,

adjacent two selected from R 31 to R 38 that are not a single bond do not bond to each other, and therefore do not form a cyclic structure,

R 41 to R 44 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms,

a pair of adjacent two selected from R 41 and R 42 , and R 42 and R 43 may bond to each other to form a substituted or unsubstituted benzene ring, or may not bond to each other and therefore may not form a benzene ring;

R 51 to R 55 and R 61 to R 68 each independently represent a hydrogen atom, or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms,

provided that one selected from R 51 to R 55 is a single bond bonding to *b, one selected from R 61 and R 64 is a single bond bonding to *c,

adjacent two selected from R 51 to R 55 that are not a single bond do not bond to each other and therefore do not form a cyclic structure,

adjacent two selected from R 61 to R 68 that are not a single bond do not bond to each other and therefore do not form a cyclic structure:

L 1 represents a single bond, or a substituted or unsubstituted phenylene group;

Ar represents a group selected from the formulae (20) to (22):

wherein

R 71 to R 75 , R 81 to R 86 , and R 91 to R 95 each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms,

provided that:

one selected from R 71 to R 75 is a single bond bonding to *d,

one selected from R 81 to R 86 is a single bond bonding to *e, the other one selected from R 81 to R 86 is a single bond bonding to *f,

** represents a bonding position to L 1 ,

m is 0,

n is 0,

*f bonds to L 1 ,

adjacent two selected from R 71 to R 75 that are not a single bond, adjacent two selected from R 81 to R 86 that are not a single bond, and adjacent two selected from R 91 to R 95 each independently may bond to each other to form a substituted or unsubstituted cyclic structure or may not bond to each other and therefore may not form a cyclic structure;

the benzene ring B and the benzene ring C, the benzene ring B and the benzene ring D, and the benzene ring C and the benzene ring D do not crosslink;

wherein

R 71 to R 75 , R 81 to R 86 , *d, *e, *f, **, m, and n are as defined in the formula (20),

R 111 to R 118 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms;

provided that:

one selected from R 111 to R 114 is a single bond bonding to *h;

adjacent two selected from R 111 to R 114 that are not a single bond and R 115 to R 118 each independently may bond to each other to form a substituted or unsubstituted cyclic structure, or may not bond to each other and therefore may not form a cyclic structure;

the benzene ring B and the benzene ring C do not crosslink;

wherein

R 121 to R 128 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms;

provided that one selected from R 121 to R 124 is a single bond bonding to *i;

X represents CR a R b or an oxygen atom;

one of R a and R b is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, the other is a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, or R a and R b each are independently a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms, and the two aryl groups may bond to each other via a single bond;

** represents a bonding position to L 1 , and

adjacent two selected from R 121 to R 124 that are not a single bond and R 125 to R 128 each independently may bond to each other to form a substituted or unsubstituted cyclic structure, or may not bond to each other and therefore may not form a cyclic structure.

2 . The compound of claim 1 , wherein R 1 is a single bond bonding to *a.

3 . The compound of claim 1 , wherein R 2 is a single bond bonding to *a.

4 . The compound of claim 1 , wherein R 3 is a single bond bonding to *a.

5 . The compound of claim 1 , wherein R 4 is a single bond bonding to *a.

6 . The compound of claim 1 , wherein R 52 or R 53 is a single bond bonding to *b.

7 . The compound of claim 1 , having formula (2):

wherein

R 1 to R 8 , *a, L 2 , R 41 to R 44 , L 1 , R 51 to R 55 , R 61 to R 68 , *b, and *c are as defined in the formula (1),

Ar 1 is the group of formula (20) or (21).

8 . The compound of claim 1 , wherein Ar or Ar 1 is a substituted or unsubstituted group of formula:

wherein arbitrary substituents are omitted.

9 . The compound of claim 1 , having formula (3):

wherein

R 1 to R 8 , *a, L 2 , R 41 to R 44 , L 1 , R 51 to R 55 , R 61 to R 68 , *b, and *c are as defined in the formula (1),

Ar 2 is the group of formula (22).

10 . The compound of claim 1 , wherein Ar or Ar 2 is a substituted or unsubstituted group of formula:

wherein arbitrary substituents are omitted.

11 . The compound of claim 1 , wherein L 2 is a group of formula (10) or a group of formula (11).

12 . The compound of claim 1 , wherein the compound comprises a deuterium atom.

13 . A material suitable for an organic electroluminescent device, comprising:

the compound of claim 1 .

14 . An organic electroluminescent device, comprising:

a cathode;

an anode; and

organic layers intervening between the cathode and the anode,

wherein the organic layers comprise a light emitting layer, and

wherein at least one layer of the organic layers contains comprises the compound of claim 1 .

15 . The device of claim 14 , wherein the compound comprises a deuterium atom.

16 . The device of claim 14 , wherein the organic layer includes a hole transporting zone between the anode and the light emitting layer, and the hole transporting zone comprises the compound.

17 . The device of claim 16 , wherein the hole transporting zone comprises a first hole transporting layer on the anode side and a second hole transporting layer on the cathode side, and

wherein the first hole transporting layer or the second hole transporting layer or both comprises the compound.

18 . The device of claim 14 , wherein the light emitting layer comprises a fluorescent dopant material.