The invention relates to isoxazolo-pyrazine derivatives and their pharmaceutically acceptable salts having affinity and selectivity for the GABA A α5 receptor binding site, their manufacture, and pharmaceutical compositions containing them. The compounds of present invention are inverse agonists of GABA A α5. The invention also relates to methods for enhancing cognition and for treating cognitive disorders like Alzheimer's disease.
本发明涉及异噁唑吡嗪衍生物及其药学上可接受的盐,具有亲和力和选择性结合GABA A α5受体结合位点,以及它们的制造和含有它们的药物组合物。本发明的化合物是GABA A α5的反向激动剂。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。
The present invention is concerned with isoxazolo-pyrazine derivatives of formula (I) wherein X is O or NH; R1 is phenyl or pyridine-2-yl, wherein the rings may be optionally substituted with one, two or three halo; R2 is H or C1-4alkyl; R3 and R4 each are independently H, optionally substituted C1-7alkyl, optionally substituted C1-7alko.xy, CN, halo, NO2, -C(0)-Ra -C(0)-NRbRc or R3 and R4 together form an optionally substituted annelated benzo ring, or a pharmaceutically acceptable salt thereof, having affinity and selectivity for GABA A α5 receptor binding site, their manufacture, pharmaceutical compositions containing them and their use as medicaments. The active compounds of the present invention are useful as cognitive enhancer or for the treatment of cognitive disorders like Alzheimer's disease.
ISOXAZOLO-PYRAZINE DERIVATIVES
申请人:Buettelmann Bernd
公开号:US20090143407A1
公开(公告)日:2009-06-04
The invention relates to isoxazolo-pyrazine derivatives and their pharmaceutically acceptable salts having affinity and selectivity for the GABA A α5 receptor binding site, their manufacture, and pharmaceutical compositions containing them. The compounds of present invention are inverse agonists of GABA A α5. The invention also relates to methods for enhancing cognition and for treating cognitive disorders like Alzheimer's disease.
这项发明涉及对GABA A α5受体结合位点具有亲和力和选择性的异噁唑啉-吡嗪衍生物及其药用可接受盐,其制备以及含有它们的药物组合物。本发明的化合物是GABA A α5的反向激动剂。该发明还涉及增强认知和治疗阿尔茨海默病等认知障碍的方法。