Patent ID: 6849116

Claim:
A quinophthalone compound represented by formula I: wherein R 1 , R 2 , R 3 and R 5 are independently hydrogen, halogen or C 1 -C 4 —alkyl; R 4 is —SO 3 H, —SO 3 − N + R 6 R 7 R 8 R 9 , —SO 2 NR 6 R 7 , —CH 2 NR 6 R 7 , —CH 2 R 10 , —COOH, —COO − N + R 6 R 7 R 8 R 9 , —COOR 11 , —COR 11 , —NO 2 or C 1 -C 4 —alkyl; R 6 , R 7 , R 8 and R 9 are independently hydrogen; C 1 -C 22 —alkyl or C 2 -C 22 -alkenyl whose carbon chains may be interrupted by one or more moieties selected from the group consisting of —O—, —S—, —NR 12 —, —CO— and —SO 2 — and/or which may each be mono- or polysubstituted by hydroxyl, halogen, aryl, C 1 -C 4 -alkoxy and/or acetyl; C 3 -C 8 —cycloalkyl whose carbon skeleton may be interrupted by one or more moieties selected from the group consisting of —O—, —S—, —NR 12 — and —CO— and/or which may be mono- or polysubstituted by hydroxyl, halogen, aryl, C 1 -C 4 —alkoxy and/or acetyl; dehydroabietyl or aryl; R 6 and R 7 or R 6 , R 7 and R 8 are together a 5- to 7-membered cyclic radical which includes the nitrogen atom and may include further heteroatoms; R 10 is R 11 is alkyl R 6 ; R 12 is hydrogen or C 1 -C 4 —alkyl; X 1 , X 2 and X 3 are independently arylene, which may be substituted by halogen, arylsulfonyl or —COR 13 or —CO—C 6 H 4 —CO—; R 13 is C 1 -C 3 -alkyl or phenyl.