| abstract |
Compound of formula (I): ** (See formula) ** where: - R 1 represents an alkyl group of 1 to 6 carbon atoms selected from the radicals methyl, ethyl, n-propyl, isopropyl, isobutyl, tert-butyl, n-pentyl, isopentyl, n-hexyl and isohexyl, a cyclopropyl, cyclohexyl, ethylenyl, allyl, propenyl, butenyl, pentenyl or hexenyl radical, an acetyl group, a methylcyclopropane group, an aralkyl group or an aryl group, the group being selected aryl between a biphenyl, cinnamyl or naphthyl radical, which may be mono- or disubstituted by a halogen atom, a CF3 radical, an alkyl radical of 1 to 6 carbon atoms, an alkoxy radical of 1 to 6 carbon atoms, a nitro functional group, a polyether radical, an aryl radical, a benzoyl radical, an alkyl ester group, a carboxylic acid, a hydroxyl radical optionally protected by an acetyl or benzoyl group, or an amino functional group optionally protected by an acetyl group or benzoyl or optionally substituted by at least one alkyl of 1 to 6 carbon atoms, and the aralkyl group being selected from a phenethyl or naphth-2-ylmethyl radical that is unsubstituted or substituted by one or more radicals selected from a halogen atom, a CF3 radical, an alkyl radical of 1 to 6 carbon atoms, an alkoxy radical of 1 to 6 carbon atoms, a hydroxyl radical or an amino functional group that is unprotected or unsubstituted or optionally substituted by at least one alkyl of 1 to 6 carbon atoms, or a carboxyl functional group; - R2 represents an alkyl group of 3 to 8 carbon atoms or a cyclopropyl, cyclopentyl, cyclohexyl, allyl, propenyl, butenyl, pentenyl, hexenyl, heptenyl or octenyl radical; - R3 is a hydrogen atom; - R4 and R5 represent a hydrogen atom; and the possible isomers, optical and / or geometric, pure or as a mixture, in any proportion, of said compound of formula (I) and the possible tautomeric forms, and also the salts of said compound of formula (I). |