Claims
- 1. Azo dyestuff of the formula
- A--N.dbd.N--B (OR).sub.n
- wherein
- A is a five- or six membered heterocyclic radical of up to 2 hetero ring atoms selected from nitrogen, sulfur and oxygen, and wherein the heterocyclic ring is unsubstituted or substituted with at least one member of the group selected from F, Cl, Br, lower alkyl with 1 to 5 carbon atoms and lower alkoxy with 1 to 5 carbon atoms; or
- A is phenyl substituted by one to three radicals selected from lower alkyl with 1 to 5 carbon atoms, lower alkoxy with 1 to 5 carbon atoms, nitro, sulphonato and benzoylamino;
- B is substituted once or twice, or unsubstituted benzene, naphthalene or quinoline, wherein the substituents are selected from the group consisting of sulphonato, lower alkoxy with 1 to 5 carbon atoms and lower alkoxypoly-ethyleneoxy containing an alkoxy group with 1 to 5 carbon atoms and 1 to 5 ethyleneoxy groups;
- R is an amino acid or di-to pentapeptide having an NH.sub.2 protective group, said amino acid being a naturally occurring L-alpha-amino acid attached to substituent B through a terminal carboxyl group; and
- n is 1 or 2.
- 2. Azo dyestuff ester as claimed in claim 1 wherein A is a five- or six-membered heterocyclic ring which is benzoannelated.
- 3. Azo dyestuff ester as claimed in claim 1 wherein A is a five-membered heterocyclic ring.
- 4. Azo dyestuff ester as claimed in claim 1 wherein A is a six-membered heterocyclic ring.
- 5. Azo dyestuff ester as claimed in claim 1 wherein A contains one nitrogen ring atom.
- 6. Azo dyestuff ester as claimed in claim 1 wherein A contains two nitrogen ring atoms.
- 7. Azo dyestuff ester as claimed in claim 1 wherein A contains one sulfur ring atom.
- 8. Azo dyestuff ester as claimed in claim 1 wherein A contains one oxygen ring atom.
- 9. Azo dyestuff ester as claimed in claim 1 wherein A contains one nitrogen and one sulfur ring atom.
- 10. Azo dyestuff ester as claimed in claim 1 wherein A contains one nitrogen and one oxygen ring atom.
- 11. Azo dyestuff ester as claimed in claim 1 wherein A is thiazolyl.
- 12. Azo dyestuff ester as claimed in claim 1 wherein A is benzothiazolyl.
- 13. Azo dyestuff ester as claimed in claim 1 wherein A is phenyl substituted with one to three substituents selected from lower alkyl with 1 to 5 carbon atoms, lower alkoxy with 1 to 5 carbon atoms, nitro, sulphonato and benzoylamino.
- 14. Azo dyestuff ester as claimed in claim 1 wherein B is benzene.
- 15. Azo dyestuff ester as claimed in claim 1 wherein B is naphthalene.
- 16. Azo dyestuff ester as claimed in claim 1 wherein B is quinoline.
- 17. Azo dyestuff ester as claimed in claim 1 wherein R is an amino acid of a naturally occurring L-alpha-amino acid attached to substituent B through a terminal carboxyl group.
- 18. Azo dyestuff ester as claimed in claim 1 wherein R is a di-to pentapeptide residue attached to substituent B through a terminal carboxyl group.
- 19. Azo dyestuff ester as claimed in claim 1 wherein n is 1.
- 20. Azo dyestuff ester as claimed in claim 1 wherein n is 2.
- 21. Azo dyestuff ester as claimed in claim 1 designated thiazole-2-azo-1'-[2'-(N-benzyloxy-carbonyl-L-alanyloxy)-naphthalene].
- 22. Azo dyestuff ester as claimed in claim 1 designated thiazole-2-azo-4'-[1'-(N-benzyloxy-carbonyl-L-alanyloxy)-naphthalene].
- 23. Azo dyestuff ester as claimed in claim 1 designated 2-methoxy-4-nitrobenzeneazo-4'-[1'-(N-benzyloxy-carbonyl-L-alanyloxy)-naphthalene].
- 24. Azo dyestuff ester as claimed in claim 1 designated 2,5-dimethoxy-4-nitrobenzeneazo-4'-[1'-(N-benzyloxy-carbonyl-L-alanyloxy)-naphthalene].
- 25. Azo dyestuff ester as claimed in claim 1 designated 2-methoxy-4-nitrobenzeneazo-4'-[1'-(N-p-toluene-sulphonyl-L-alanyloxy)-naphthalene].
Priority Claims (1)
Number |
Date |
Country |
Kind |
2836644 |
Aug 1978 |
DEX |
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Parent Case Info
This is a division, of application Ser. No. 063,211, filed Aug. 2, 1979, now U.S. Pat. No. 4,296,202.
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Number |
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Date |
Kind |
2170262 |
Graenacher et al. |
Aug 1939 |
|
2332666 |
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4296202 |
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Foreign Referenced Citations (6)
Number |
Date |
Country |
2065465 |
Sep 1973 |
DEX |
2083840 |
Dec 1971 |
FRX |
2145664 |
Feb 1973 |
FRX |
45-39511 |
Dec 1970 |
JPX |
45-40188 |
Dec 1970 |
JPX |
1167176 |
Oct 1969 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Chem. Abs., vol. 71, Sep. 22, 1969, No. 12, Ida et al. |
Klin. W. Schr., 46, pp. 642-650, (1968), Schmalzi et al. |
Divisions (1)
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Number |
Date |
Country |
Parent |
63211 |
Aug 1979 |
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