Patent ID: 7312245

Claim:
A diamine derivative, represented by the following general formula (1): wherein R1 represents an alkyl group with 1 to 6 carbon atoms provided that the alkyl group is not a tert-butyl, a cycloalkyl group with 3 to 6 carbon atoms, an alkenyl group with 2 to 6 carbon atoms, a cycloalkenyl group with 3 to 6 carbon atoms, an alkynyl group with 2 to 6 carbon atoms, an arylalkyl group which may be substituted, a heteroarylalkyl group which may be substituted, an aryl group which may be substituted, or a heteroaryl group which may be substituted; R2 and R7 independently represent a hydrogen atom, an alkyl group with 1 to 6 carbon atoms, a cycloalkyl group with 3 to 6 carbon atoms, an alkenyl group with 2 to 6 carbon atoms, a cycloalkenyl group with 3 to 6 carbon atoms, an alkynyl group with 2 to 6 carbon atoms, an arylalkyl group which may be substituted, an aryl group which may be substituted, or an acyl group; R3 and R4 independently represent a hydrogen atom, an alkyl group with 1 to 6 carbon atoms, a cycloalkyl group with 3 to 6 carbon atoms, an alkenyl group with 2 to 6 carbon atoms, a cycloalkenyl group with 3 to 6 carbon atoms, an alkynyl group with 2 to 6 carbon atoms, an arylalkyl group which may be substituted, a heteroarylalkyl group which may be substituted, an aryl group which may be substituted or a heteroaryl group which may be substituted, or a cycloalkyl group with 3 to 6 carbon atoms including an attached carbon atom; R5 and R6 independently represent a hydrogen atom, an alkyl group with 1 to 6 carbon atoms, a cycloalkyl group with 3 to 6 carbon atoms, an alkenyl group with 2 to 6 carbon atoms, a cycloalkenyl group with 3 to 6 carbon atoms, an alkynyl group with 2 to 6 carbon atoms, an arylalkyl group which may be substituted, or an aryl group which may be substituted; provided that the case is excluded where R3, R4, R5 and R6 all represent a hydrogen atom or where any one of R3, R4, R5 and R6 represents a methyl group which may be substituted and the others represent a hydrogen atom, and R8 represents an aryl group which may be substituted or a heteroaryl group which may be substituted.