申请人:CHUGAI SEIYAKU KABUSHIKI KAISHA
公开号:EP0995437A1
公开(公告)日:2000-04-26
2,3-Dihydrobenzofuran derivatives of general formula (1):
wherein R1 represents a hydrogen atom or an acyl group; R2, R3 and R4 represent a hydrogen atom, a lower alkyl group or a lower alkenyl group; R5 and R6 represent a hydrogen atom or an optionally substituted alkyl group, or R5 and R6 combine to form a cycloalkyl group or a saturated heterocyclic group containing one or more oxygen atoms or alkyl-substituted nitrogen atoms, provided that R2 and R3 can not simultaneously represent a t-butyl group, or optically active isomers or pharmaceutically acceptable salts thereof are useful as therapeutic or prophylactic agents for various renal diseases and as organ preservatives.
通式(1)的 2,3-二氢苯并呋喃衍生物:
其中 R1 代表氢原子或酰基;R2、R3 和 R4 代表氢原子、低级烷基或低级烯基;R5 和 R6 代表氢原子或任选取代的烷基,或 R5 和 R6 结合形成环烷基或含有一个或多个氧原子或烷基取代的氮原子的饱和杂环基,但 R2 和 R3 不能同时代表叔丁基,或其光学活性异构体或药学上可接受的盐,可用作各种肾脏疾病的治疗剂或预防剂以及器官防腐剂。