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US 4,022,771 AGranted
Aminophenyl lactone compounds containing an ethyleno group
AssigneeNCR Corporation
InventorSheldon Farber
Life of this patent
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Abstract
A chromogenic compound of normally colorless form is disclosed having the following structural formula: ##STR1## T, Q, X, Y and Z can be, among several others, hydrogen, alkyl, alkoxy, aryl, and heterocyclic, substituted and unsubstituted; and E can be a broad family of aromatic and heterocyclic structures. The compound is eligible for use in pressure-sensitive record materials and manifold marking systems. Because of light absorption characteristics, selected compounds of this invention are especially useful where machine readability and machine copiability are important.
Claims12
A compound represented by the formula:
- ##STR11## wherein E is:
- ##STR12## unsubstituted and alkyl-, cloro-, dichloro-, trichloro-, tetrachloro-, bromo-, dibromo-, tribromo-, tetrabromo-, nitro-, and dialkylamino- substituted;
- ##STR13## 4-alkoxyphenyl;
- 2,4-dialkoxyphenyl and 3,4-dialkoxyphenyl;
- Y is:
- any X;
- hydrogen;
- carbalkoxy;
- and nitro;
- R.sub.1 and R.sub.2 are:
- hydrogen, alkyl, unsubstituted phenyl, substituted phenyl, benzyl, acyl, and cycloalkyl;
- but R.sub.1 and R.sub.2 are not both phenyl;
- R.sub.3, r.sub.4, r.sub.5, and R.sub.6 are:
- hydrogen, alkyl, phenyl, benzyl, alkoxy, halo, dialkylamino, monoalkylamino, amino and acylamino.
11 more elements
Dependencies are inferred from the claim text.