abstract |
The invention concerns bi-aromatic compounds of formula (I) in which Ar represents (a), Z being O or S, R 1 is CH 3 , —CH 2 —O—R 6 , —OR 6 or —COR 7 ; R 2 is —OR 8 , —SR 8 or a polyether radical if in the latter case R 4 is C 1 -C 20 alkyl and is in ortho or meta position relative to X—Ar; R 3 is alkyl or R 2 and R 3 together form a cycle optionally interrupted by O or S; R 4 is aryl radical; R 5 is H, halogen, C 1 -C 20 alkyl or —OR 8 ; R 6 is H, alkyl or —COR 9 ; R 7 is H, alkyl, —N(r′)(r″) or —OR 10 ; R 8 is H, alkyl or —COR 9 ; R 9 is alkyl; R 10 is H, C 1 -C 20 alkyl, alkenyl, monohydroxyalkyl or polyhydroxyalkyl, aryl or aralkyl or a sugar residue, r′ and r″ are H, alkyl mono- or polyhydroxyalkyl, aryl, an amino acid or sugar residue or together form a heterocycle, X represents a radical of formula (d) or (e) in which R 11 is H or —OR 6 ; R 12 is H or alkyl; or R 11 and R 12 form an oxo radical, and the salts, optical and geometrical isomers of the compounds of formula (I). |