| abstract |
The subject of the invention is compounds of formula I cyclohexyl, naphthyl, biphenyl or a 5 or 6-membered heterocyclic containing O, S or N; R1 and R2 are C1-C20 alkyl, OR11, CF3 or halogen; R3, R4 and R5 are H, C1-C20 alkyl, OR11 or halogen; R6 is C1-C24 alkyl, C2-C24 alkyl interrupted by O, S or NR14; C2-C24 alkenyl, interrupted or not by O, s or NR14; C7-C24 arylalkyl; C4-C24 cycloalkyl, interrupted or not with O, S and / or NR14; or C8-C24 arylcycloalkyl; R11 is C1-C20 alkyl, C3-C8 cycloalkyl, phenyl, benzylz or C2-C20 alkyl, interrupted by O or S; R12 and R13 sint H, C1-C20 alkyl, C3-C8 cycloalkyl, phenyl, benzyl or C2-C20 alkyl, interrupted by O; or R12 and R13 are together C3-C5 alkylene, interrupted or not by O, S or NR14; R14 is H, phenyl, C1-C12 alkyl or C2-C12 alkyl, interrupted by O or S; and M is H, Li, Na or K. |