2-(N-CYANOIMINO)THIAZOLIDIN-4-ONE DERIVATIVES

摘要

This invention provides novel 2-(N-cyanoimino)thiazolidin-4-one derivatives represented by formula I or a pharmaceutically acceptable salt or solvate thereof: wherein ring A represents a benzene ring, a condensed ring or a heterocyclic ring, each of which may be substituted by one or more substituents selected from a straight or branched C1 - C4 alkyl group, a haloalkyl group, a halogen atom or -OR<5>, R<1> represents a single bond, an oxygen atom, a sulfur atom, a methyne group, a straight or branched C1 - C4 alkylene or alkenylene group optionally substituted by a phenyl group, R<6>-X X-R<6>, X-R<6>-X R<6>-X-R<6>, -C(=O)-NR<7>- or -NR<7>-C(=O)-, R<2> and R<3> are the same or different and each represents a hydrogen atom, a C1 - C4 alkyl group, -OR<8> or a halogen atom, R<4> represents a hydrogen atom or a C1 - C4 alkyl group, R<5> represents a hydrogen atom or a C1 - C4 alkyl group, R<6> represents a straight or branched C1 - C4 alkylene or alkenylene group, R<7> represents a hydrogen atom or a C1 - C4 alkyl group, R<8> represents a hydrogen atom, a C1 - C4 alkyl group or an aralkyl group, X represents an oxygen atom or a sulfur atom. They have excellent activities of lowering triglyceride and cholesterol levels, and are useful for preventing from and/or treating hyperlipidemia and related complications.