Novel fluorine-containing benz-azole derivatives, process for th

Details Novel fluorine-containing benz-azole derivatives, process for th Novel fluorine-containing benz-azole derivatives, process for th

1978-11-13

1981-04-21

Berch, Mark L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

25230128, 106288Q, 548305, 564156, C07D263062, C07D27766, C09K 1106, C09K 902

Patent

active

042634415

ABSTRACT:
Compounds of the general formula ##STR1## in which X represents a trifluoromethyl group or a fluorine atom, n is 1 or 2, Z is an oxygen atom or a NR grouping, in which R is hydrogen or an optionally substituted alkyl group, the benzo rings optionally containing further nonchromophoric substituents. These compounds may be prepared by reacting the dichloride of 1,4-naphthalene-dicarboxylic acid with 2 mols of an o-aminophenol or of an o-nitroaniline and by subsequently cyclizing the acylamino compound obtained. The products are suitable as optical brighteners.

REFERENCES:
patent: 3314894 (1967-04-01), Nyilas
patent: 3336330 (1967-08-01), Schinzel
patent: 3798231 (1974-03-01), Fleck

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