Benzofuran derivatives, process for their preparation and...

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

C - Chemistry, Metallurgy

07

D

8/52, 260/305.05

C07D 307/92 (2006.01) C07D 235/18 (2006.01) C07D 307/79 (2006.01)

Patent

CA 1039289

Abstract of the Disclosure Novel benzofuran containing a benzimidazolyl group are obtained by reacting a benzofuran containing a carboxylic acid halide group with either an ortho-phenylene diamine or an ortho-nitro-aniline derivative, in the latter case reducing the nitro intermediate to the corresponding (aminophenyl)-amide and splitting off water by closing the imidazole ring. The products are optical brighteners, especially for acrylonitrile polymers.

190947

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