Styryl-like compounds showing a color-developing and bleaching b

Details Styryl-like compounds showing a color-developing and bleaching b Styryl-like compounds showing a color-developing and bleaching b

1981-04-20

1983-04-19

Demers, Arthur P.

Harness for working animal

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

Patent

active

043806295

ABSTRACT:
Styryl-like compounds showing improved stability and prolonged lifetime on repetition of the coloration and bleaching cycle and represented by the general formula ##STR1## in which R represents an alkyl or phenyl group, R.sub.1 and R.sub.2 independently represent a lower alkyl group, a hydroxyalkyl group, or an alkoxyalkyl group, R.sub.3 represents hydrogen, an alkyl group, a halogen, a nitrile group, an aromatic group or a phenoxy group, Y represents O or S, Z represents an alkylene radical of 2 to 4 carbon atoms, with or without alkyl substituent(s), necessary for forming a ring structure together with ##STR2## A represents a residue of an aromatic aldehyde, a heterocyclic aldehyde, an aromatic nitroso compound or a heterocyclic nitroso compound, and n is an integer of 2 or 3.

REFERENCES:
patent: 3975379 (1976-08-01), Schmitt
patent: 4147862 (1979-04-01), Hayami et al.
patent: 4314058 (1982-02-01), Hayami et al.

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