Claims
- 1. A compound represented by the following formula (I): wherein R11, R12, R13, R14, R21, R22, R23 and R24 each represents a hydrogen atom, an alkyl group, an aryl group having from 6 to 10 carbon atoms or a heterocyclic group; L represents a phenylene group or a naphthylene group; each of pairs R11 and R12, R13 and R14, R21 and R22, and R23 and R24 may be combined with each other to form a ring; the compound contains at least one group represented by —SO3M or —OH in the molecule, wherein M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or pyridinium; with the proviso that the case where three or more of R11, R12, R13, R14, R21, R22, R23 and R24 are an aryl group is excluded; with the proviso that the case where at least one of R11, R12, R13 and R14 are combined with at least one of R21, R22, R23 and R24 to form a ring is excluded; and with the proviso that the compound does not contain a group represented by —N═N— in the molecule.
- 2. The compound according to claim 1, wherein R11, R12, R13, R14, R21, R22, R23 and R24 each independently represents a hydrogen atom, an alkyl group or an aryl group.
- 3. The compound according to claim 1, wherein R11, R12, R13, R14, R21, R22, R23 and R24 each independently represents a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, a sulfomethyl group, a 2-hydroxyethyl group, a 3-hydroxypropyl group, a 2-hydroxypropyl group, a 2-sulfoethyl group, a 2-methoxyethyl group, 2-(2-hydroxyethoxy)ethyl group, a 2-[2-(2-hydroxyethoxy)ethoxy]ethyl group, a 2,3-dihydroxypropyl group, a 3,4-dihydroxybutyl group, a phenyl group, a 3-carboxyphenyl group, a 4-carboxyphenyl group, a 3,5-dicarboxyphenyl group, a 4-methoxyphenyl group, a 2-sulfophenyl group or a 4-sulfophenyl group.
- 4. The compound according to claim 1, wherein L is a substituted or unsubstituted phenylene or naphthylene group having 6 to 20 carbon atoms.
- 5. The compound according to claim 1, wherein L represents 1,4-phenylene, 1,3-phenylene, 1,2-phenylene, 1,5-naphthylene, 1,8-naphthylene, 4-carboxy-1,2-phenylene, 5-carboxy-1,3-phenylene, 3-sulfo-1,4-phenylene, 5-sulfo-1,3-phenylene, 2,5-dimethoxy-1,4-phenylene or 2,6-dichloro-1,4-phenylene.
- 6. The compound according to claim 1, wherein the ring formed by combining each of pairs R11 and R12, R13 and R14, R21 and R22, and R23 and R24 is a 5- or 6-membered ring.
- 7. The compound according to claim 1, wherein the ring formed by each pair R11 and R12, R13 and R14, R21 and R22, or R23 and R24 combined with each other is a pyrrolidine ring, a piperidine ring, a piperazine ring or a morpholine ring.
- 8. The compound according to claim 1, wherein said heterocyclic group has from 2 to 10 carbon atoms.
Priority Claims (1)
Number |
Date |
Country |
Kind |
P.2000-251175 |
Aug 2000 |
JP |
|
Parent Case Info
This is a divisional of application Ser. No. 09/933,019, filed Aug. 21, 2001, now U.S. Pat. No. 6,605,420; the disclosure of which is incorporated herein by reference.
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