申请人:Takeda Chemical Industries, Ltd.
公开号:US05639781A1
公开(公告)日:1997-06-17
The present invention provides a cathepsin L inhibitor containing a compound of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom or an arylalkyl, heterocyclic-alkyl or lower alkyl group which may be substituted; R.sup.2 and R.sup.3 independently are a hydrogen atom or a hydrocarbon residue which may be substituted; R.sup.4 is an alkanoyl, sulfonyl, carbonyloxy, carbamoyl or thiocarbamoyl group which may be substituted; X is formula: --CHO or --CH.sub.2 OB (wherein B is a hydrogen atom or a protecting group of hydroxyl group); m and n independently are an integer of 0 or 1; provided that R.sup.4 is an alkanoyl group substituted by aryl, a sulfonyl group substituted by aryl having more than 9 carbon atoms or by lower alkyl, or a carbamoyl or thiocarbamoyl group which may be substituted when R.sup.1 is an unsubstituted lower alkyl, arylalkyl on methylthioethyl group, R.sup.2 and R.sup.3 independently are a lower alkyl or arylalkyl, X is --CHO, m is 1 and n is 0 or 1, or a salt thereof. Compound (I) is useful as a prophylactic/therapeutic agent for osteoporosis.
本发明提供了一种含有化合物的半胱氨酸蛋白酶L抑制剂,其化学式为:##STR1## 其中R.sup.1是氢原子或可以被取代的芳基烷基,杂环烷基烷基或较低烷基;R.sup.2和R.sup.3分别是可以被取代的氢原子或碳氢基;R.sup.4是可以被取代的烷酰基,磺酰基,羰氧基,氨基甲酰基或硫脲甲酰基;X是公式:--CHO或--CH.sub.2 OB(其中B是氢原子或羟基的保护基);m和n分别是0或1的整数;前提是当R.sup.1是未取代的较低烷基,芳基烷基或甲基硫乙基时,R.sup.4是被芳基取代的烷酰基,被具有9个以上碳原子的芳基或较低烷基取代的磺酰基,或者是可以被取代的氨基甲酰基或硫脲甲酰基,R.sup.2和R.sup.3分别是较低烷基或芳基烷基,X是--CHO,m为1,n为0或1,或其盐。化合物(I)可用作预防/治疗骨质疏松症的药物。