申请人:Beecham Group P.L.C.
公开号:US04968691A1
公开(公告)日:1990-11-06
A compound of formula (I) or a pharmaceutically acceptable salt thereof: ##STR1## in which X represents a group ##STR2## in which p represents an integer of 2 to 4; r represents an integer of 1 or 2; s represents 0 or 1; and A represents a 3-membered divalent residue completing a 5-membered aromatic ring and comprises one or two heteroatoms selected from oxygen, nitrogen and sulphur, any amino nitrogen optionally substituted by a C.sub.1-4 alkyl group, and when (p,r,s) is (2,2,0) or (2,2,1) any A comprising 2 heteroatoms is optionally C-substituted by a methyl group, and when (p,r,s) is (2,1,0), (2,1,1) or (3,1,0) any A comprising 2 heteroatoms is optionally C-substituted by C.sub.1-2 alkyl and any A comprising one heteroatom is optionally C-substituted by a methyl group, and wherein compounds of formula (I) having two asymetric centers have the stereo-chemical configuration in which the group X and the (CH.sub.2).sub.r bridge are on the same side of the plane of the molecule which contains both bridgehead atoms and the ring carbon atom bonded to the group X. The compounds of the present invention enhance acetylcholine function via an action at muscarinic receptors within the central nervous system and are therefore of potential use in the treatment and/or prophylaxis of dementia in mammals.
公式(I)的化合物或其药学上可接受的盐:##STR1##其中X表示一个基团##STR2##其中p表示2到4的整数;r表示1或2的整数;s表示0或1;A表示一个3-成员二价残基,完成一个5-成员芳香环并包括从氧、氮和硫中选择的一个或两个杂原子,任何氨基氮可选择地被C.sub.1-4烷基取代,当(p,r,s)为(2,2,0)或(2,2,1)时,任何包含2个杂原子的A可选择地被甲基基团取代,当(p,r,s)为(2,1,0),(2,1,1)或(3,1,0)时,任何包含2个杂原子的A可选择地被C.sub.1-2烷基取代,任何包含一个杂原子的A可选择地被甲基基团取代,以及具有两个不对称中心的公式(I)的化合物具有在包含两个桥头原子和与基团X键合的环碳原子的分子平面的同一侧上的立体化学构型,该化合物通过在中枢神经系统内作用于毒蕈碱受体来增强乙酰胆碱功能,因此可能用于哺乳动物的痴呆症的治疗和/或预防。