申请人:Mitsubishi Tanabe Pharma Corporation
公开号:US08163759B2
公开(公告)日:2012-04-24
The present invention provides a pyrazolo[1,5-a]pyrimidine compound, having CB1 receptor-antagonizing activity, of the following formula [I]: in which R1 and R2 are the same or different and each an optionally substituted aryl group etc, R0 is hydrogen atom, an alkyl group etc, E is a group of the formula: —C(═O)— or —SO2—, R is a group of the following formula [i], [ii]or [iii] etc: Ring A is (a) a C3-8 cycloalkyl group optionally fused to a benzene ring or (b) a benzene ring, Q is a single bond or a methylene group, Ring B is a 4- to 7-membered aliphatic heterocyclic group, said cyclic group binding via its ring-carbon atom to the adjacent nitrogen atom, X is sulfur atom etc, R3 is an alkyl group optionally substituted by an alkylthio group, R4 is hydrogen atom, an alkyl group etc, one of RA and RB is an alkyl group etc, and the other is hydrogen atom, an alkyl group etc, or a pharmaceutically acceptable salt thereof.
本发明提供了一种具有CB1受体拮抗活性的吡唑并[1,5-a]嘧啶化合物,其化学式[I]如下:其中,R1和R2相同或不同,分别为可选择取代的芳基基团等,R0为氢原子、烷基基团等,E为下式的基团:—C(═O)—或—SO2—,R为下式的基团[i]、[ii]或[ iii]等:环A为(a)一个C3-8环烷基团,可选择与苯环融合,或(b)一个苯环,Q为单键或亚甲基基团,环B为一个4-至7-成员的脂环杂环基团,所述环基团通过其环碳原子与相邻的氮原子结合,X为硫原子等,R3为可选择取代的烷基基团,其中该烷基基团被烷基硫基取代,R4为氢原子、烷基基团等,RA和RB中的一个为烷基基团等,另一个为氢原子、烷基基团等,或其药学上可接受的盐。