ALPHA-(ARYL-OR HETEROARYL-METHYL)-BETA PIPERIDINO PROPANAMIDE COMPOUNDS AS ORL1-RECEPTOR ANTAGONISTS

摘要

This invention provides the compounds of formula (I), or a pharmaceutically acceptable salt thereof, wherein R1 and R2 independently represent hydrogen or the like; R3 and R4 independently represents hydrogen or the like; R5 represents aryl or the like; -X-Y- represents -CH2O- or the like; and n represents 0, 1 or 2.These compounds have ORL1 -receptor antagonist activity; and therefore, are useful to treat diseases or conditions such as pain, various CNS diseases etc.