| abstract |
Compounds, characterized by the fact that they respond to the ** formula ** in which: - R1 represents: (i) the radical -CH3 (ii) the radical -CH2-O-R5 (iii) the radical -COR6 R5 and R6 have the meanings given below, - Ar represents a radical chosen from among the radicals of formulas (a) - (e) R7 has the meanings given below, - R2 and R3 the same or different independently represent a radical chosen from: ( i) a hydrogen atom, (ii) a radical chosen from the third butyl, 1-methylcyclohexyl, or 1-adamantyl radicals, (iii) a -OR8 radical, R8 has the meanings given below, (iv) a polyether radical of 1 to 6 carbon atoms and 1 to 3 oxygen or sulfur atoms, it being understood that at least one of the radicals R2 or R3 represents a radical, and the optical and geometric isomers of said compounds of formula (I) as well as their you go out. |