Novel Urea-Containing Compounds as Orexin Receptor Agonists for Treating Sleep Disorders, Namely, Narcolepsy, Hypersomnia, and Sleep Apnea Syndrome

Provided herein are novel urea-containing compounds as orexin receptor agonists, pharmaceutical compositions, use of such compounds in treating sleep disorders, namely, narcolepsy, hypersomnia, and sleep apnea syndrome as well as processes for preparing such compounds.