Patent ID: 7232617

Claim:
A compound of formula [I]: X—R [I] wherein X represents the group: and R is either (i) represented by the formula [II] wherein n is 1 or 2, and the or each R 7 group is independently selected from the group consisting of hydrogen and halogen atoms, cyano, nitro, mercapto, carbonyl and sulfone groups, and optionally substituted alkyl, haloalkyl, hydroxyalkyl, aryl, alkoxy, aryloxy, alkylamino, arylamino, alkylthio, arylthio, ester, siloxy, cyclic hydrocarbon and heterocyclic groups; or (ii) is selected from the group consisting of optionally substituted alkyl, hydroxyalkyl, aryl, cyclic hydrocarbon and heterocyclic groups; wherein in each case R 1 –R 6 are each independently selected from the group consisting of hydrogen and halogen atoms, cyano, nitro, mercapto, carbonyl and sulfone groups, and optionally substituted alkyl, haloalkyl, hydroxyalkyl, aryl, alkoxy, aryloxy, alkylamino, arylamino, alkylthio, arylthio, ester, siloxy, cyclic hydrocarbon and heterocyclic groups; except when R is aryl, then one of R 5 and R 6 is other than hydrogen; and except when R is methyl, then one of R 5 and R 6 is other than fluorine, other than phenoxy, and other than hydrogen; and except when R is phenyl, then one of R 5 and R 6 is other than chlorine; and except when R is tolyl, then one of R 5 and R 6 is other than phenoxy, and other than fluorine; and when R is tolyl, then one of R 5 and R 6 is other than fluorine and the other of R 5 and R 6 is other than arylamino.