| abstract |
The compounds correspond to the formula …<IMAGE>… in which: - X denotes a (CH2)n group with n denoting an integer equal to 2, 3 or 4 or a vinylene group or a methylvinylene group; - R1 and R2, considered independently, denote hydrogen or a substituent occupying one of the free positions of the benzene ring and chosen from halogens, a lower alkyl group, a lower alkoxy group, a hydroxyl group, a thiol group, a nitro group, or an optionally substituted amino group; - Y denotes oxygen, sulphur or an -NH- group; - R3 denotes especially an amino group. |