4,4'-Stilbenebis-pyridooxazoles and related optical brighteners

Details 4,4'-Stilbenebis-pyridooxazoles and related optical brighteners 4,4'-Stilbenebis-pyridooxazoles and related optical brighteners

1971-07-14

1976-01-27

Randolph, John D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

117 335R, 2523012W, 260296H, C07D22100

Patent

active

039351955

ABSTRACT:
4,4'-Stilbenebis-2-oxazolopyridines, -2-thiazolopyridines, and 2-imidazopyridines are optical brightening agents useful for whitening and brightening natural and synthetic fibers, papers, resins and the like. The compounds are conveniently prepared by interacting 4,4'-stilbenedicarboxylic acid or its acid chloride with a vicinal disubstituted pyridine compound consisting of vic-aminohydroxypyridine, vic-aminomercaptopyridine or vic-diaminopyridine, respectively.

REFERENCES:
patent: 3322680 (1967-05-01), Hedberg et al.
patent: 3586673 (1971-06-01), Bloom et al.
patent: 3712888 (1973-01-01), Kaempfen
Rochling et al, Chem. Ber. Vol. 104, pp. 344-347 (1971).
Chemical Abstracts, Vol. 73, Abst. No. 110912 (1970).
Chemical Abstracts, Vol. 75, Abst. No. 99260t (1971).

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