申请人:ZENYAKU KOGYO KABUSHIKI KAISHA
公开号:EP0491053A1
公开(公告)日:1992-06-24
An acid addition salt of a bis-dioxopiperazine derivative represented by general formula (I), wherein R¹ represents C₁ to C₆ alkyl; R² represents hydrogen or (a); R³ represents hydrogen, C₁ to C₆ alkyl or -(CH₂)n-A, wherein A represents carboxyl, benzyloxycarbonyl, mercapto, amino, benzyloxycarbonylamino or (b), wherein X represents hydrogen, trifluoromethyl, hydroxy, acetoxy or benzyloxy, and n represents an integer of 1 to 4; and R⁴ represents hydrogen or alternatively R⁴ and R³ are combined together to represent a 5-membered cyclic group optionally containing sulfur.
通式(I)代表的双-二氧代哌嗪衍生物的酸加成盐,其中R¹代表C₁至C₆烷基;R²代表氢或(a);R³ 代表氢、C₁至 C₆烷基或-(CH₂)n-A,其中 A 代表羧基、苄氧羰基、巯基、氨基、苄氧羰基氨基或 (b),其中 X 代表氢、三氟甲基、羟基、乙酰氧基或苄氧基,n 代表 1 至 4 的整数;R⁴ 代表氢,或者 R⁴ 和 R³ 结合在一起代表任选含硫的 5 元环基。