| abstract |
The present invention relates to a method for producing a benzazine compound represented by the following formula (1) or a salt thereof, and an intermediate, a benzoic acid compound, at high yield and high purity on an industrial scale, wherein the benzazine compound has vasopressin antagonistic activity. It is useful as an intermediate for preparing the pharmaceutically active compound, 2,3,4,5-tetrahydro-1H-1-benzezepine compound. <Formula 1> Wherein X 1 is a halogen atom, R 1 And R 2 is a lower alkyl group. |