An object of the present invention is to provide a novel tetrahydroazepine compound and a process for producing the same.The present invention relates to a tetrahydroazepine compound represented by the formula (10) or a salt thereof, anda process for producing the said compound or a salt thereof. (In the formula, R1 is an optionally substituted alkyl group, R2 is an optionally substituted alkyl group and one of the X—Y bond and the Y—Z bond is a carbon-carbon double bond and the other is a carbon-carbon single bond).