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

摘要

Compound of formula (I): wherein: R₁ and R₂, which may be identical or different, each represents hydrogen, acyl or alkyl, Ar represents aryl or heteroaryl, A represents a group selected from: R₄ represents hydrogen or alkyl, R₅ represents hydrogen, alkyl, aryl or heteroaryl, R₃ represents aryl, heteroaryl, dicyclopropylmethyl or benzhydryl, or A-R₃ represents an optionally substituted naphthyl group, with the exclusion of 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. Medicinal products containing the same which are useful in the treatment of diseases associated with a deregulation of glycaemia.