Benzofuran derivatives, process for their manufacture and...

Details Benzofuran derivatives, process for their manufacture and... Benzofuran derivatives, process for their manufacture and...

C - Chemistry, Metallurgy

09

B

260/303

C09B 23/14 (2006.01) C09B 57/00 (2006.01) D06L 3/12 (2006.01)

Patent

CA 1083578

NEW BENZOFURAN DERIVATIVES, PROCESS FOR THEIR MANUFACTURE AND THEIR USE AS OPTICAL BRIGHTENERS Abstract of the disclosure: Furanyl-(2)-1,2,4-oxadiazoles of the formula Image wherein A represents an aromatic mononuclear or binuclear ring system which with two adjacent carbon atoms is fused with the furan nucleus in the manner indi- cated, R represents hydrogen, a lower alkyl group, an optio- nally substituted phenyl group, as well as an op- tionally functionally modified carboxy group, X represents a direct bond, as well as the following divalent radicals Image , Image , Image , Image Image , Image , Image , Image B represents a straight-chained or branched, optional- ly substituted alkyl group or an optionally substi- tuted aryl or heteroaryl group. These compounds are suitable for the optical brightening of high molecular weight organic substances, especially for tex- tile materials of synthetic polymers. - 1a -

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