The present invention relates to new selective 5HT6 receptor binding benzofuran derivatives of general formula (I) wherein, Z represents a hydrogen atom, C1-4 acyl group, C1-6 alkyl sulfonyl group, phenyl sulfonyl group substituted with one or more halogen atom； or naphthyl sulfonyl group optionally substituted with a halogen atom, tetrahydro naphthyl sulfonyl group, (lS)(+)-10-camphor-sulfonyl group, (lR)(-)-10-camphor-sulfonyl group or benzofuranyl sulfonyl group, substituted with a halogen atom and C1 -4 alkyl group, Y represents C2-6 alkylene group, R1 and R2 represent, independently, a hydrogen atom, C1-4 alkyl group, benzyl group, or together with one or more halogen atoms, trifluoromethyl group, or C1-4 alkoxy group substituted 4-phenyl-piperazine-l-yl group； and/or their pharmaceutically suitable acid addition salts, to the process for producing said compounds, to pharmaceutical compositions containing said compounds and to their use in treatment and/or prevention of disorders of the central nervous system and cardiovascular system.
