Patent ID: 7101998

Claim:
Compounds of formula (I): in which: R 1 represents a direct bond, an oxygen atom, a group >CH 2 , a sulphur atom, a group >C═O, a sulphur atom, a group >C═O, a group —(CH 2 ) 2 — or a group of formula —N—R a , where R a represents a hydrogen atom or a C 1 –C 12 alkyl group having from 1 to 12 carbon atoms; R 4 , R 5 , R 6 and R 7 are independently selected from hydrogen atoms and substituents, defined below, provided that, when R 1 represents a group >C═O, then at least one of R 4 , R 5 , R 6 and R 7 represents a substituent; R 8 , R 9 , R 10 and R 11 are independently selected from hydrogen atoms, hydroxy groups, and C 1 –C 4 alkyl groups; or R 9 and R 11 are joined to form a fused ring system with the benzene rings to which they are attached; R 12 represents a direct bond, an oxygen atom or a —CH 2 — group; said substituents are: a C 1 –C 20 alkyl group, a C 1 –C 20 alkoxy group, a C 2 –C 20 alkenyl group, a halogen atom, a nitrile group, a hydroxyl group, a C 6 –C 10 aryl group, a C 7 –C 13 aralkyl group, a C 6 –C 10 aryloxy group, a C 7 –C 13 aralkyloxy group, a C 8 –C 12 arylalkenyl group, a C 3 –C 8 cycloalkyl group, a carboxy group, a C 2 –C 7 carboxyalkoxy group, a C 2 –C 7 alkoxycarbonyl group, a C 7 –C 13 aryloxycarbonyl group, a C 2 –C 7 alkylcarbonyloxy group, a C 1 –C 6 alkanesulphonyl group, a C 6 –C 10 arenesulphonyl group, a C 1 –C 6 alkanoyl group or a C 7 –C 11 arylcarbonyl group; and X − represents an anion, provided X − does not represent an alkoxy, hydroxyalkoxy or aryloxy group, or perchlorate group, when R 1 represents a direct bond; provided that R 1 is not a sulphur atom when R 3 is OH in the ortho position of the ring, R 4 through R 11 are hydrogen, R 12 is a direct bond in either meta position of the ring containing R 9 , and X is perchlorate; and or an esters thereof.