Patent ID: 7081550

Claim:
An arylamine compound represented by the formula (2): wherein at least one of A and B represents an atom group forming a substituted or unsubstituted saturated five-membered to eight-membered ring that may include a spiro atom; and Ar 5 to Ar 8 each independently represent a substituted or unsubstituted aryl group having 6 to 40 carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 40 carbon atoms and may represent a same group or different groups, with the following provisos: (1) when A represents an atom group forming a substituted or unsubstituted saturated five-membered ring, B represents an atom group forming a substituted or unsubstituted saturated five-membered ring to eight-membered ring structure; (2) when A represents an atom group forming a five-membered ring structure including a spiro atom, B represents an atom group forming a substituted or unsubstituted saturated five-membered ring to eight-membered ring structure; (3) when A represents an atom group forming a substituted or unsubstituted saturated six-membered ring structure, B represents an atom group forming a substituted or unsubstituted saturated five-membered ring to eight-membered ring structure; with the further proviso that at least one of A and B does not include two or more unsaturated six-membered ring structures; (4) when A represents an atom group forming a substituted or unsubstituted saturated six-membered ring structure including a spiro atom, B is vacant or represents an atom group forming a substituted or unsubstituted saturated five-membered ring to eight-membered ring structure; and (5) when A represents —CH 2 —O—, B is vacant.