NOVEL 3-ARYL-2,5-DIHYDROXY-1,4-BENZOQUINONE DERIVATIVES, THEIR PREPARATION METHOD AND PHARMACEUTICAL COMPOSITIONS CONTAINING SAME

摘要

The invention concerns a compound of formula (I), wherein: R1 and R2, identical or different, represent each a hydrogen atom or an acyl or alkyl group; Ar represents an aryl or heteroaryl group; A represents a group selected from formula (II); R4 represents a hydrogen atom or an alkyl group; R5 represents a hydrogen atom or a group selected among alkyl, aryl and heteroaryl; R3 represents an aryl, heteroaryl, dicyclopropylmethyl or benzhydryl group, or A-R3 represents an optionally substituted naphthyl group, excluding 2,5-dihydroxy-3-(4-methoxyphenyl)-6-(2-phenylethenyl)-1,4-benzoquinone, 2,5-dihydroxy-3-(4-methoxyphenyl)-6-(2-naphthyl)-1,4-benzoquinone, and 2,5-dihydroxy-3-(2-naphthyl)-6-phenyl-1,4-benzoquinone. The inventive compound is useful for preparing medicines.