2,3-Dihydrobenzofuran derivatives of general formula
1
wherein R
1
represents a hydrogen atom or an acyl group; R
2
, R
3
and R
4
represent a hydrogen atom, a lower alkyl group or a lower alkenyl group; R
5
and R
6
combine to form a cycloalkyl group or a saturated heterocyclic group containing one or more oxygen atoms or sulfur atoms, provided that R
2
and R
3
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、低碳烷基或低碳烯基;R5和R6结合形成环戊基或含有一个或多个氧原子或
硫原子的饱和杂环基团,但R2和R3不能同时代表叔丁基基团,或其光学异构体或药学上可接受的盐可用作各种肾脏疾病的治疗或预防剂以及器官保护剂。