Back to results
US 5,719,270 AGranted
Azophenyl compounds
OwnerSteven Michael Partington, David Allan Clarkeinventors
Life of this patent
Estimating the term…
Abstract
Azophenyl compounds of the formula: ##STR1## wherein R.sub.1 is an o-, p-directing substituent; R.sub.2 is a substituted or unsubstituted .beta.-hydroxyalkyl group; R.sub.3 is an aromatic carbocyclic or heterocyclic group which is mono- or poly-cyclic and is substituted or unsubstituted; and wherein the benzene ring A may contain one or more further substituents. The compounds are useful as dyestuffs (if they are themselves colored) or as intermediates in the preparation of dyestuffs.
Claims3
An azophenyl compound of the formula:
- ##STR4## wherein R.sub.1 is a nitrogen-containing group of the formula --NR.sub.4 R.sub.5, where R.sub.4 and R.sub.5 are independently each selected from the group consisting of a hydrogen atom and substituted and unsubstituted alkyl groups and aralkyl groups;
- R.sub.2 is .beta.-hydroxyethyl;
- R.sub.3 is unsubstituted phenyl or phenyl substituted at the 4-position with carboxyl or sulfonyl, and wherein the benzene ring A may contain at least one further substituent.
Dependencies are inferred from the claim text.