The present invention provides novel 2-methylpropionic acid derivatives represented by the general formula:
(wherein R1 represents a hydrogen atom, a lower alkyl group or an aralkyl group; R2 represents a hydrogen atom a lower alkyl group or a halogen atom; A represents an oxygen atom or an imino group; the carbon atom marked with (R) represents a carbon atom in R configuration; and the carbon atom marked with (S) represents a carbon atom in S configuration) and pharmaceutically acceptable salts thereof, which have excellent &bgr;3-adrenoceptor stimulating effects and are useful as agents for the prevention or treatment of obesity, hyperglycemia, the diseases caused by intestinal hypermotility, pollakiuria, urinary incontinence, depression, or the diseases caused by biliary calculi or hypermotility of the biliary tract.
本发明提供了一种新型的2-甲基
丙酸衍
生物,其通式表示为:(其中R1代表氢原子,低碳基或芳基烷基;R2代表氢原子,低碳基或卤原子;A代表氧原子或
亚胺基;标有(R)的碳原子代表R构型中的碳原子;标有(S)的碳原子代表S构型中的碳原子),以及其药学上可接受的盐,具有优异的β3-
肾上腺素能受体刺激作用,可用作预防或治疗肥胖症、高血糖症、肠道过动症引起的疾病、尿频、尿失禁、抑郁症或胆石或胆道过动症引起的疾病的药剂。