Imidazolidine derivatives

A compound represented by formula (II) or (II-a):

• wherein n is an integer selected from 1 to 20;
• Ra and Rb, which may be the same or different, are each selected from the group consisting of a linear or branched C1-C6 alkyl group substituted with one or more W1, a linear or branched C1-C6 alkylcarbonyl group which may be substituted with one or more W1, an arylcarbonyl group which may be substituted with one or more W2, a linear or branched C1-C6 alkoxycarbonyl group which may be substituted with one or more W1, an aryloxycarbonyl group which may be substituted with one or more W2, a linear or branched C1-C6 alkylaminocarbonyl group which may be substituted with one or more W1, a linear or branched C1-C6 dialkylaminocarbonyl group which may be substituted with one or more W1, a linear or branched C1-C6 alkylsulfonyl group which may be substituted with one or more W1, an arylsulfonyl group which may be substituted with one or more W2, and R1 and R2;
• or
• Ra and Rb may be joined together to form a group ═CH—W3;
• W1 is a linear or branched C1-C6 alkoxy group, a linear or branched C1-C6 alkylthio group, a linear or branched C1-C6 alkylsulfinyl group, a linear or branched C1-C6 alkylsulfonyl group, an aryl group which may be substituted with one or more W2, an aryloxy group which may be substituted with one or more W2, or a C1-C3 aralkyloxy group which may be substituted with one or more W2;
• W2 is a linear or branched C1-C6 alkyl group, a linear or branched C1-C6 alkoxy group, a linear or branched C1-C6 haloalkyl group, a halogen atom, a cyano group, or a nitro group;
• W3 is a linear or branched C1-C6 alkyl group, a linear or branched C1-C6 alkoxy group, a linear or branched C1-C6 alkylamino group, or a linear or branched C1-C6 dialkylamino group;
• Rc is a linear or branched C1-C6 alkyl group;
• and
• R1 and R2, which may be the same or different, each represent a hydrogen atom or a linear or branched C1-C6 alkyl group.

A compound represented by formula (III):

• wherein n is an integer selected from 1 to 20;
• Ra and Rb, which may be the same or different, are each selected from the group consisting of a linear or branched C1-C6 alkyl group substituted with one or more W1, a linear or branched C1-C6 alkylcarbonyl group which may be substituted with one or more W1, an arylcarbonyl group which may be substituted with one or more W2, a linear or branched C1-C6 alkoxycarbonyl group which may be substituted with one or more W1, an aryloxycarbonyl group which may be substituted with one or more W2, a linear or branched C1-C6 alkylaminocarbonyl group which may be substituted with one or more W1, a linear or branched C1-C6 dialkylaminocarbonyl group which may be substituted with one or more W1, a linear or branched C1-C6 alkylsulfonyl group which may be substituted with one or more W1, an arylsulfonyl group which may be substituted with one or more W2, and R1 and R2;
• or
• Ra and Rb may be joined together to form a group ═CH—W3;
• W1 is a linear or branched C1-C6 alkoxy group, a linear or branched C1-C6 alkylthio group, a linear or branched C1-C6 alkylsulfinyl group, a linear or branched C1-C6 alkylsulfonyl group, an aryl group which may be substituted with one or more W2, an aryloxy group which may be substituted with one or more W2, or a C1-C3 aralkyloxy group which may be substituted with one or more W2;
• W2 is a linear or branched C1-C6 alkyl group, a linear or branched C1-C6 alkoxy group, a linear or branched C1-C6 haloalkyl group, a halogen atom, a cyano group, or a nitro group;
• and
• W3 is a linear or branched C1-C6 alkyl group, a linear or branched C1-C6 alkoxy group, a linear or branched C1-C6 alkylamino group, or a linear or branched C1-C6 dialkylamino group.