申请人:Kaken Pharmaceutical Co., Ltd.
公开号:US04666931A1
公开(公告)日:1987-05-19
A benzofuran derivative having the general formula (I): ##STR1## wherein R.sup.1 is hydrogen atom, a benzyl group, unsubstituted or substituted with a halogen atom or an alkyloxy group, or an alkyl group having 1 to 3 carbon atoms, R.sup.2 is hydrogen atom or an alkyl group having 1 to 3 carbon atoms, R.sup.3 is acetyl group, ethyl group, carboxyl group or 4-methyl-2,5-dioxoimidazolidine-4-yl group, R.sup.4 is hydrogen atom, hydroxyl group, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 9 carbon atoms, carboxymethoxy group, nitro group, acetoamino group, a benzylozy group unsubstituted or substituted with a halogen atom, nitro group or an alkyloxy group or a group having the formula: --OR.sup.6, wherein R.sup.6 is an alkenyl group having 2 to 4 carbon atoms or an alkyl group having 2 to 3 carbon atoms having a halogen atom, cyano group or oxo group, R.sup.5 is hydrogen atom or methylenedioxy group together with R.sup.4 group, n is 1 or 2, and the unsubstituted or substituted N-carboxymethylsulfamoyl group, R.sup.4 and R.sup.5 are attached at 3-position, 4-position, 5-position, 6-position or 7-position of the benzofuran ring, or a nontoxic salt thereof, process for preparing the same and a pharmaceutical composition containing the same. The compounds of the present invention have powerful aldose reductase inhibiting activity, platelet aggregation inhibiting activity and arachidonic acid metabolism inhibiting activity and are useful for a remedy for treatment of diabetic complications.
具有通式(I)的苯并呋喃衍生物:##STR1##其中R.sup.1是氢原子,苄基,未取代或取代有卤素原子或烷氧基的苄基,或具有1至3个碳原子的烷基;R.sup.2是氢原子或具有1至3个碳原子的烷基;R.sup.3是乙酰基,乙基基,羧基或4-甲基-2,5-二氧咪唑啉-4-基基;R.sup.4是氢原子,羟基,具有1至6个碳原子的烷基,具有1至9个碳原子的烷氧基,羧甲氧基,硝基,乙酰氨基基,未取代或取代有卤素原子,硝基或烷氧基的苄氧基或具有公式的基团:--OR.sup.6,其中R.sup.6是具有2至4个碳原子的烯基基团或具有2至3个碳原子的烷基基团,具有卤素原子,氰基或氧代基;R.sup.5是氢原子或与R.sup.4基团一起的亚甲二氧基基团;n为1或2,未取代或取代的N-羧甲基磺酰氨基团,R.sup.4和R.sup.5附着在苯并呋喃环的3位、4位、5位、6位或7位,或其无毒盐,制备方法以及含有其的制药组合物。本发明化合物具有强大的醛固酮还原酶抑制活性、血小板聚集抑制活性和花生四烯酸代谢抑制活性,并且适用于治疗糖尿病并发症的治疗药物。