NAPHTHALENE DERIVATIVE AND PROCESSES FOR PREPARING SAME

摘要

: The present invention is directed to naphthalene derivatives of the formula: (I) wherein Ring A is a substituted or unsubstituted benzene ring; each of R1 and R2 is a group of the formula: -OR5, -NHR5 or ; or either one of R1 and R2 is a lower alkoxy group and the other one is a group of the formula: -OR5, -NHR5 or ; each of R3 and R4 is a lower alkoxy group, or one of R3 and R4 is a lower alkoxy group and the other is a hydrogen atom; R5 is a substituted alkyl group, a heterocyclic group, a cycloalkyl group, an alkyl group of at least 5 carbon atoms or alkenyl group; and each of R6 and R7 is a hydrogen atom or a lower alkyl group and salts thereof. These naphthalene derivatives (I) and their salts have excellent hypolipidemic activity and are useful for the treatment or prophylaxis of hyperlipidemia and/or arteriosclerosis.