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

An aromatic amine derivative represented by a formula (1):

• where:
• R2, R3, R4, R5, R7, R8, R9 and R10 each independently represent 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, with a proviso that, in the formula (1), R1 and R6 are represented by a formula (2):
• where:
• L1, L2 and L3 each independently represent 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,
• Ar1 is a monovalent residue derived from a ring structure represented by a formula (4):
• where:
• X represents an oxygen atom or a sulfur atom, R11 to R18 each independently represent 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 or unsubstituted alkyl group having 1 to 30 carbon atoms;
• with a proviso that, when at least one of R11 to R18 is an unsubstituted methyl group, R11, R12, R14, R15, R17 or R18 is the unsubstituted methyl group;
• one of R11 to R18 is a single bond to be bonded with 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 may form a saturated or unsaturated ring;
• and
• in the formula (2), Ar2 represents a substituted or unsubstituted biphenyl group.