Aminophenyl lactone compounds containing an ethyleno group

Details Aminophenyl lactone compounds containing an ethyleno group Aminophenyl lactone compounds containing an ethyleno group

1975-04-10

1977-05-10

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602401, 260240E, 2603131, 260250R, C07D30786, C07D30788

Patent

active

040227715

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.

REFERENCES:
patent: 2505488 (1950-04-01), Green
patent: 3703397 (1972-11-01), Lin et al.
patent: 3896116 (1975-09-01), Ozutsumi et al.
patent: 3928685 (1975-12-01), Alsop

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