申请人:Wakamoto Pharmaceutical Co., Ltd.
公开号:US05055481A1
公开(公告)日:1991-10-08
The present invention relates to an aldose reductase inhibitor having the following formula: ##STR1## R.sub.1 is a hydrogen atom or --A--COOR.sub.5 (A is an alkylene group having 1 to 4 carbon atoms and R.sub.5 is a hydrogen atom or a lower alkyl group), and R.sub.2, R.sub.3 and R.sub.4 are the same as or different from each other and selected from the group consisting of a hydrogen atom, a hydroxy group, a halogen atom, a carboxyl group, an alkyl group, an amide group, an amino group, an alkoxy group, an aryl group, an aryloxy group, an alkylthio group, an alkylsulfinyl group, an alkylsulfonyl group, a nitro group, --NHCOCOOR.sub.6 (R.sub.6 is a hydrogen atom or a lower alkyl group), a mono- or dialkylaminosulfonyl group, and a residual group having the following formula: ##STR2## (A and R.sub.5 are the same as in the above). The compounds defined in the above are excellent in aldose reductase inhibitory activity and low in toxicity. Therefore, those compounds are useful as a preventive agent and/or a remedy for diabetic complications such as neuropathy, retinopathy, nephropathy, cataracts and keratopathy.
本发明涉及一种醛糖还原酶抑制剂,其具有以下结构式:##STR1## R.sub.1是氢原子或--A--COOR.sub.5(其中A是具有1至4个碳原子的烷基基团,R.sub.5是氢原子或较低烷基基团),而R.sub.2、R.sub.3和R.sub.4相同或不同,并从氢原子、羟基、卤原子、羧基、烷基、酰胺基、氨基、烷氧基、芳基、芳氧基、烷硫基、烷基亚硫基、烷基磺基、硝基、--NHCOCOOR.sub.6(R.sub.6是氢原子或较低烷基基团)、单烷基或二烷基氨基磺基,以及以下结构式的残基中选择:##STR2##(其中A和R.sub.5与上述相同)。上述定义的化合物在醛糖还原酶抑制活性方面表现出色,毒性低。因此,这些化合物可用作糖尿病并发症如神经病变、视网膜病变、肾病、白内障和角膜病变的预防剂和/或治疗剂。