申请人:Hoffman-La Roche Inc.
公开号:US07432256B2
公开(公告)日:2008-10-07
The present invention is concerned with substituted imidazo[1,5-a][1,2,4]triazolo[1,5-d][1,4]benzodiazepine derivatives of the formula I
wherein
R1 is hydrogen, halogen, lower alkyl, lower alkyl substituted by halogen, lower alkoxy, lower alkoxy substituted by halogen, nitro, cycloalkyl, —O(CH2)mO(CH2)mOH or —C≡C—R′;
R2 is hydrogen or methyl;
R3 is lower alkyl, lower alkyl substituted by halogen, lower alkenyl, lower alkenyl substituted by halogen, lower alkynyl, —(CH2)n-cycloalkyl, —(CR′R″)m—CH3, phenyl that is unsubstituted or substituted by halogen, pyridinyl or thienyl each of which is unsubstituted or substituted by lower alkyl, —(CH2)n—NH-cycloalkyl, lower alkenyl-cycloalkyl, lower alkynyl-(CR′R″)mOH, or lower alkynyl-phenyl wherein the phenyl ring is unsubstituited or substituted by halogen, CF3, lower alkyl or lower alkoxy;
R′ is hydrogen or lower alkyl;
R″ is hydrogen, hydroxy or lower alkyl;
n is 0, 1 or 2;
m is 1, 2 or 3; and
o is 1 or 2;
and pharmaceutically acceptable acid addition salts thereof. This class of compounds have high affinity and selectivity for GABA A α5 receptor binding sites. Thus, the invention also relates to methods of enhancing cognition and treating cognitive disorders like Alzheimer's disease.
本发明涉及公式I的取代咪唑[1,5-a][1,2,4]三唑并[1,5-d][1,4]苯二氮平衍生物,其中R1是氢、卤素、较低烷基、较低烷基卤素取代、较低烷氧基、较低烷氧基卤素取代、硝基、环烷基、—O(CH2)mO(CH2)mOH或—C≡C—R′; R2是氢或甲基; R3是较低烷基、较低烷基卤素取代、较低烯基、较低烯基卤素取代、较低炔基、—(CH2)n-环烷基、—(CR′R″)m—CH3、苯基,未取代或卤素取代、吡啶基或噻吩基,未取代或较低烷基取代、—(CH2)n—NH-环烷基、较低烯基-环烷基、较低炔基-(CR′R″)mOH或较低炔基-苯基,其中苯环为未取代或卤素、CF3、较低烷基或较低烷氧基取代; R′是氢或较低烷基; R″是氢、羟基或较低烷基; n为0、1或2; m为1、2或3; o为1或2;以及其药学上可接受的酸盐。这类化合物对GABA A α5受体结合位点具有高亲和力和选择性。因此,本发明还涉及增强认知和治疗认知障碍如阿尔茨海默病的方法。