申请人:Buettelmann Bernd
公开号:US20060128691A1
公开(公告)日:2006-06-15
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
R
1
is hydrogen, halogen, lower alkyl, lower alkyl substituted by halogen, lower alkoxy, lower alkoxy substituted by halogen, nitro, cycloalkyl, —O(CH
2
)
m
O(CH
2
)
m
OH or —C≡C—R′;
R
2
is hydrogen or methyl;
R
3
is lower alkyl, lower alkyl substituted by halogen, lower alkenyl, lower alkenyl substituted by halogen, lower alkynyl, —(CH
2
)
n
-cycloalkyl, —(CR′R″)
m
—CH
3
, phenyl that is unsubstituted or substituted by halogen, pyridinyl or thienyl each of which is unsubstituted or substituted by lower alkyl, —(CH
2
)
n
—NH-cycloalkyl, lower alkenyl-cycloalkyl, lower alkynyl-(CR′R″)
m
OH, or lower alkynyl-phenyl wherein the phenyl ring is unsubstituited or substituted by halogen, CF
3
, 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 α
5
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[1,5-d][1,4]苯二氮杂环己烷衍生物,其中R1为氢、卤素、较低烷基、被卤素取代的较低烷基、较低烷氧基、被卤素取代的较低烷氧基、硝基、环烷基、—O(CH2)mO(CH2)mOH或—C≡C—R′;R2为氢或甲基;R3为较低烷基、被卤素取代的较低烷基、较低烯基、被卤素取代的较低烯基、较低炔基、—(CH2)n-环烷基、—(CR′R″)m—CH3、苯基(未取代或被卤素取代)、吡啶基或噻吩基,每种基未取代或被较低烷基取代、—(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,其中苯环未取代或被卤素、CF3、较低烷基或较低烷氧基取代;R′为氢或较低烷基;R″为氢、羟基或较低烷基;n为0、1或2;m为1、2或3;o为1或2;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,该发明还涉及增强认知和治疗像阿尔茨海默病这样的认知障碍的方法。