| abstract |
Compounds of formula (I) :n and stereoisomers thereof, wherein V is an oxygen or a sulphur atom; X and Y which may be the same or different, are hydrogen or halogen atoms, or optionally substituted alkyl, optionally substituted alkenyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted alkynyl, haloalkyl, alkoxy, haloalkoxy, optionally substituted aryloxy, optionally substituted arylalkoxy, optionally substituted acyloxy, optionally substituted amino, acylamino, nitro, nitrile, -CO₂R³, -CONR⁴R⁵ or -COR⁶ groups; or the groups X and Y, when they are in adjacent positions on the phenyl ring, may join to form a fused ring; either aromatic or aliphatic, optionally containing one or more heteroatoms; and Z is optionally substituted methylene, optionally substituted amino, oxygen or sulphur and when Z is a substituted methylene group, the substituent may join the 2-position of the phenyl ring to form a non-aromatic fused ring; R¹ and R² are alkyl groups containing from one to four carbon atoms, optionally substituted with one or more halogen atoms; and R³, R⁴, R⁵ and R⁶, which may be the same or different, are hydrogen atoms or optionally substituted alkyl, cycloalkyl, alkenyl, alkynyl, optionally substituted aryl, optionally substituted aralkyl, or cycloalkylalkyl groups; and metal complexes thereof. |