Benzoxazole derivatives, process for their preparation and their

Details Benzoxazole derivatives, process for their preparation and their Benzoxazole derivatives, process for their preparation and their

1976-06-08

1977-09-13

Rush, Raymond V.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 457PH, 260 458NZ, 260471R, 260471A, 260519, 25230128, 560 43, 560 44, C07D26354

Patent

active

040481859

ABSTRACT:
Compounds of the general formula I ##STR1## in which R represents hydrogen or a lower alkyl radical which may be further substituted, n is an integer of from 1 to 4, and which may contain further non-chromophoric substituents. They are prepared by reaction of the dichloride of naphthalene-1,4-dicarboxylic acid with an o-aminophenol and subsequent ring closure. These compounds can be used as optical brighteners.

REFERENCES:
patent: 3709896 (1973-01-01), Frischkorn et al.
patent: 3755343 (1973-08-01), Anliker et al.
patent: 3872094 (1975-03-01), Meyer

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