.alpha., .omega.-dicarboxylic acids and medicaments which contain these

Abstract

##STR1## .alpha., .omega.-dicarboxylic acids having the general formula (I') in which: R.sub.1 and R.sub.2, which may be different or the same, represent a lower alkyl group which can be substituted by hydroxy, lower alkoxy, halogen or phenyl, the phenyl being capable of substitution one or several times by hydroxy, lower alkoxy, lower alkyl or halogen; a lower alkenyl or alkinyl group; a C.sub.3 -C.sub.7 -cyclo-alkyl group or a phenyl group possibly substituted by hydroxy, halogen, lower alkyl or lower alkoxy, and X and Y, which may be different or the same, represent hydrogen, lower alkyl, lower alkoxy, hydroxy, cyano, halogen, carboxyl, lower alkoxycarbonyl or carbamoyl, and Q represents non-ramified, saturated or unsaturated alkyl chain with 8-14 C atoms, which can be substituted, interrupted by hetero-atoms, and form part of a cyclic system, as well as their carboxylic acid derivatives in vivo, provided that when Q represents an unramified, saturated alkyl chain with 8-14 C atoms, and R.sub.1 and R.sub.2 represent methyl and Y represents hydrogen, X may not represent hydrogen, ethoxy-carbonyl, bromine, cyano or methyl, and if R.sub.1 and R.sub.2 represent methyl and X and Y hydrogen, then Q may not represent any formula (II) group. Process for their preparation and medicines containing these compounds, which have an anti-diabetic action and lower the level of lipids.