Bicyclic compounds and pharmaceutical composition containing tricyclic compound for treating or preventing sleep disorders

摘要

A compound having the following general fomula: <CHEM> wherein R1 is an optionally substituted hydrocarbon, amino or heterocyclic group; R2 is H or an optionally substituted hydrocarbon group; R3 is H or an optionally substituted hydrocarbon or heterocyclic group; X is CHR4, NR4, O or S in which R4 is H or an optionally substituted hydrocarbon group; R5 is H, a halogen atom, C1-6 alkyl group, a C1-6 alkoxy group, a hydroxy group, a nitro group, a cyano group or an amino group wherein the C1-6 alkyl group, the C1-6 alkoxy group and the amino group may be substituted by 1 to 5 substituents, Y is C or N; ring B is an optionally substituted benzene ring; m = 1 to 4 and n = 0 to 2; L represents a leaving group such as a halogen atom, an alkylsulfonyl group, an alkylsulfonlyoxy group and arylsulfonyloxy group; or a salt thereof.