The present invention provides a benzazepine compound that can maintain for a long period of time the blood level of tolvaptan enabling to provide the desired pharmaceutical effects. The benzazepine compound of the present invention is represented by general formula (1)
wherein R
1
represents a —CO—(CH
2
)
n
—COR
2
group (wherein n is an integer of 1 to 4, and R
2
is (2-1) a hydroxy group; (2-2) a lower alkoxy group optionally substituted with a hydroxy group, a lower alkanoyl group, a lower alkanoyloxy group, a lower alkoxycarbonyloxy group, a cycloalkyloxycarbonyloxy group, or 5-methyl-2-oxo-1,3-dioxo-4-yl; or (2-3) an amino group optionally substituted with a hydroxy-lower alkyl group), or the like.
本发明提供了一种苯氮卓环化合物,可以长时间维持托瑞普坦的血液
水平,从而实现所需的药效。本发明的苯氮卓环化合物由通式(1)表示,其中R1代表—CO—(
CH2)n—COR2基团(其中n是1至4的整数,R2是(2-1)羟基基团;(2-2)选择性地用羟基基团、低级烷氧基团、低级酰基基团、低级酰氧基团、低级烷氧羰氧基团、环烷氧羰氧基团或5-甲基-2-氧代-1,3-二氧代-4-基基团取代的低级烷氧基团;或(2-3)选择性地用羟基-低级烷基基团取代的
氨基基团),等等。