Aromatic amine derivative, material for organic electroluminescent element, and organic electroluminescent element

An aromatic amine derivative of a formula (1) below,

• where:
• R2, R3, R4, R5, R7, R8, R9 and R10 are each independently a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 30 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted trifluoroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted aryloxy group having 6 to 30 ring carbon atoms;
• and
• R1 and R6 are each represented by a formula (2) below,
• where:
• L1, L2 and L3 are each independently a single bond, a divalent residue of a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a divalent residue of a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms;
• and
• Ar1 is a monovalent residue derived from a ring structure of a formula (4) below,
• where:
• X is an oxygen atom or a sulfur atom;
• R11 to R18 are each independently a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 30 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted trifluoroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted aryloxy group having 6 to 30 ring carbon atoms;
• at least one of R11 to R18 is a substituted aryl group having 6 to 30 ring carbon atoms;
• one of R11 to R18 is a single bond to L1;
• at least one combination of R11 and R12, R12 and R13, R13 and R14, R15 and R16, R16 and R17, and R17 and R18 optionally forms a saturated or unsaturated ring;
• Ar2 in the formula (2) is a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms, or a monovalent residue derived from the ring structure of the formula (4);
• and
• one of R11 to R18 is a single bond to L2 when Ar2 is a monovalent residue derived from the ring structure of the formula (4).