Process for producing amide compound

A process for producing an amide compound represented by the formula (3):

• wherein R1 represents a C1-C6 alkyl group optionally substituted with at least one halogen atom, R2 represents a hydrogen atom, or a C1-C6 alkyl group optionally substituted with at least one halogen atom, R3 represents a C1-C6 alkyl group optionally substituted with at least one halogen atom, a C3-C6 alkoxyalkyl group optionally substituted with at least one halogen atom, a C3-C6 alkenyl group optionally substituted with at least one halogen atom, or a C3-C6 alkynyl group optionally substituted with at least one halogen atom, R4 represents a halogen atom, or a C1-C6 alkyl group optionally substituted with at least one halogen atom, and R5 represents a hydrogen atom, a halogen atom, a cyano group, or a C1-C6 alkyl group optionally substituted with at least one halogen atom, R6 represents a hydrogen atom, a halogen atom, a cyano group, a C1-C6 alkyl group optionally substituted with at least one halogen atom, a C1-C6 alkoxy group optionally substituted with at least one halogen atom, a C1-C6 alkylthio group optionally substituted with at least one halogen atom, a C1-C6 alkylsulfinyl group optionally substituted with at least one halogen atom, or a C1-C6 alkylsulfonyl group optionally substituted with at least one halogen atom, and R7 represents a halogen atom, or a C1-C6 alkyl group optionally substituted with at least one halogen atom, which comprises reacting an aniline compound represented by the formula (1):
• wherein R1, R2, R3, R4 and R5 are as defined above, with an aldehyde compound represented by the formula (2):
• wherein R6 and R7 are as defined above, in a solvent in the presence of a quinone compound.