| abstract |
1. The compounds of formula (I)! ! where R1 is the radical —OR6, the radical —NR6OR6, the radical N ·; where R6 has the following meanings,! R2 is a halogen atom, an alkyl radical containing from 1 to 12 carbon atoms, an —OR7 radical, an —NHR7 radical, an aralkyl radical; where R7 has the following meanings; ! R3 is an alkyl radical containing from 1 to 12 carbon atoms, a cycloalkyl radical containing from 3 to 12 carbon atoms, or the sequence - (CH2) mR8; where m and R8 have the following meanings; ! X means the following sequence:! - (CH2) z-NR9-C (Y) - (NR10) w-,! where w, z, R9, R10 and Y have the following meanings,! m is an integer ranging from 0 to 4; ! Y is an oxygen or sulfur atom; ! z and w are 0 or 1; ! each of Ar1 and Ar2 is an aromatic radical, optionally substituted with an R4 or R5 radical (as defined below), of the formula:! for Ar1! ! for Ar2! ! R4 and R5, which may be the same or different, mean a hydrogen atom, a halogen atom, an alkyl radical with 1-12 carbon atoms, a hydroxyl radical, an alkoxy radical, a polyether radical, an aralkyl radical, an aryl radical, an amino radical which may be substituted by one or two radicals that are the same or different and are selected from the group consisting of an alkyl radical with 1-12 carbon atoms or an aralkyl radical; ! R6 is a hydrogen atom, an alkyl radical containing from 1 to 7 carbon atoms, an aryl or aralkyl radical; ! R7 means a hydrogen atom, an alkyl radical containing from 1 to 7 carbon atoms, an aryl or aralkyl radical; ! R8 means an alkyl radical containing from 1 to 7 carbon atoms, cycloalkyl radical, aryl, aralki |