Aromatic amine derivative, organic electroluminescent element employing the same, and process for producing aromatic amine derivative

An aromatic amine derivative represented by general formula (A′):

• wherein
• R1′ and R2′ each independently represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms;
• excluding a case where both R1′ and R2′ are hydrogen atoms;
• A1, A2, A3 and A4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 5 to 25 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms;
• however, at least one of A1, A2, A3 and A4 bonds to meta-position of a bonding position where a nitrogen atom bonds;
• further, a case where any substituent of each group represented by R1′, R2′, A1, A2, A3 and A4 comprises a vinyl group is excluded;
• p, q, r and s each independently represents an integer of 1 to 5;
• when p represents an integer of 2 or greater, each of plural Al may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring;
• when q represents an integer of 2 or greater, each of plural A2 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring;
• when r represents an integer of 2 or greater, each of plural A3 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring;
• and when s represents an integer of 2 or greater, each of plural A4 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring.

An aromatic amine derivative represented by general formula (A″):

• wherein
• R1′ and R2′ each independently represents a hydrogen atom or an alkyl group selected from the group consisting of a methyl group, an ethyl group, a propyl group, and an isopropyl group;
• excluding a case where both R1′ and R2′ are hydrogen atoms;
• A1, A2, A3 and A4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 5 to 25 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 25 carbon atoms;
• however, when A1, A2, A3 and A4 all represent alkyl groups, a total sum made by adding numbers of carbon atoms in A1, A2, A3 and A4 does not exceed 10;
• further, a case where any substituent of each group represented by R1′, R2′, A1, A2, A3 and A4 comprises a vinyl group is excluded;
• p, q, r and s each independently represents an integer of 1 to 5;
• when p represents an integer of 2 or greater, each of plural Al may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring;
• when q represents an integer of 2 or greater, each of plural A2 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring;
• when r represents an integer of 2 or greater, each of plural A3 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring;
• and when s represents an integer of 2 or greater, each of plural A4 may be the same with, or different from each other, and may bond each other to form a saturated or unsaturated ring.