The present invention relates to a
cycloalkene derivative having an orexin 2
receptor (OX2R) agonistic activity. Specifically, the present invention relates to a compound as represented by general formula (I), a stereoisomer thereof, a
tautomer thereof, a pharmaceutically acceptable salt thereof, and pharmaceutically acceptable salts of said stereoisomer and
tautomer. The present invention further relates to a pharmaceutical composition containing the compound, a preparation method therefor, and the use thereof as an orexin 2
receptor (OX2R)
agonist in the prevention or treatment of diseases associated with the orexin 2
receptor (OX2R) agonistic effect, such as
narcolepsy, hypersomnia,
sleep apnea, post-
anesthesia recovery or respiratory inhibition amelioration, wherein each
substituent in the general formula (I) is the same as that defined in the description.