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US 3,994,906 AGranted
3-Sulphoalkyl-6-hydroxy-pyrid-(2)-ones
AssigneeCiba-Geigy Corporation
InventorGert Hegar
Life of this patent
Estimating the term…
Abstract
A compound of the formula ##SPC1## Wherein R and R' each represent a hydrogen atom, an alkyl or aryl radical or a heterocyclic radical and X represents a sulphoalkyl group. These compounds are useful as coupling components for the manufacture of dyestuffs which are distinguished by high tinctorial strength.
Claims11
A compound of the formula ##SPC7##
- wherein
- R and R' may be the same or different, each representing hydrogen;
- lower alkyl;
- lower alkyl substituted by hydroxyl, amino, lower alkanoylamino, halo or phenyl;
- phenyl;
- or pheyl substituted by lower alkyl or lower alkoxy;
- W is hydrogen or H.sub.2 NCO--, and
- X is ##EQU1## wherein Y is hydrogen;
- lower alkyl;
- phenyl;
- phenyl substituted by nitro, halo, lower alkoxy, amino, lower alkanoylamino, sulfo or carboxyl;
- furyl;
- thiofuryl;
- or pyridyl.
11 more elements
Dependencies are inferred from the claim text.