Treating various disorders using TrkB agonists

Novel compounds and methods for activating the TrkB receptor are provided. The methods include administering in vivo or in vitro a therapeutically effective amount of a compound containing four six-membered rings and a substituted or unsubstituted C 5 or C 6 heteroaryl or heterocycloalkyl ring and pharmaceutically acceptable salts, prodrugs, and derivatives thereof. Specifically, methods and compounds for the treatment of disorders including neurologic, neuropsychiatric, and metabolic disorders are provided. For example, a method is provided of treating or reducing the risk of depression, anxiety, or obesity in a subject, which includes selecting a subject with or at risk of developing depression, anxiety, or obesity, and administering to the subject a therapeutically effective amount of the described compounds. A further method of promoting neuroprotection in a subject is provided, which includes selecting a subject in need of neuroprotection, and administering to the subject a therapeutically effective amount of the described compounds.