Indolins styryl-like compounds

Details Indolins styryl-like compounds Indolins styryl-like compounds

1980-02-06

1982-02-02

Demers, Arthur P.

Harness for working animal

2602433, 2602444, 2602455, 2602456, 2602457, 542415, 542401, 542432, 542434, 544 32, 544 89, 544242, 544333, 546270, 548121, 548159, 548150, 548217, C07D49804

Patent

active

043140580

ABSTRACT:
This invention relates to color-changing stryl-like compounds and the preparing of the same. A compound according to the present invention has, as its principal ring, an indoline ring of 2nd position, and has, at stimulation reversible or irreversible change(s) between a closed ring structre of a non-plane molecular structure indicated by the following chemical formula(1) showing white or pale color, and an open ring structure of a plane molecular structure indicated by the following chemical formula(2) showing vivid visible color: ##STR1## Wherein Q represents benzene ring with or without substituted radicals and/or condensed ring(s); R.sub.1 and R.sub.2 represent lower alkyl radicals hydroxyalkyl radicals or alkoxyalkyl radicals of the same or different kinds,; R.sub.3 represents hydrogen, alkyl radical, alkoxy radical, halogen, nitrile radical, aromatic radical or phenoxy radical; Y represents oxygen (O) or sulfer (S); Z represents alkylene radical of carbon number of 2 to 4 with or without alkyl substitution radical(s) necessary to form a ring structure together with ##STR2## A represents a condensation reaction residue of an aromatic aldehyde, heterocyclic aldehyde, aromatic nitroso compound, or heterocyclic nitroso compound. And X represents an anion.

REFERENCES:
patent: 3860583 (1975-01-01), Schmitt
patent: 3904613 (1975-09-01), Schmitt
patent: 3975379 (1976-08-01), Schmitt
Chemischerr Informationsdienst 1974, #5-262.

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