Amide derivatives, process for preparation thereof and use thereof as insecticide

A compound represented by Formula (1):

• wherein A2, A3 and A4 each represent a carbon atom, and A1 represents a nitrogen atom or an oxidized nitrogen atom;
• R1 and R2 each represent a hydrogen atom, an optionally substituted alkyl group or an optionally substituted C1-C4 alkylcarbonyl group;
• G1 and G2 each represent an oxygen atom or a sulfur atom;
• Xs, which may be identical or different each other, represents a hydrogen atom, a halogen atom, a C1-C3 alkyl group or a trifluoromethyl group;
• n is an integer of 0 to 3;
• Q1 represents an optionally substituted phenyl group;
• and
• Q2 represents a phenyl group or pyridyl group having one or more substituents, at least one of the substituent being any of a C1-C4 haloalkoxy group, a C2-C6 perfluoroalkyl group, a C1-C6 perfluoroalkylthio group, a C1-C6 perfluoroalkylsulfinyl group and a C1-C6 perfluoroalkylsulfonyl group.