SYNTHESIS AND APPLICATION OF 4-(COUMARIN-3-YL)-THIOPHENES
- 1 October 1992
- journal article
- research article
- Published by Taylor & Francis in Phosphorus, Sulfur, and Silicon and the Related Elements
- Vol. 71 (1-4) , 1-6
- https://doi.org/10.1080/10426509208034490
Abstract
A facile synthesis of 4-(coumarin-3-yl)thiophenes (6a-6j) was achieved by the condensation of ethyl 2-acetamido-3, 5-dicarbethoxythiophene-4 acetate (4) with selected o-hydroxyaldehydes (5a-5j) in the presence of piperidine. The key intermediate, ethyl 2-acetamido-3, 5-dicarbethoxythiophene-4-acetate (4) was synthesized by cyclocondensation of diethyl acetonedicarboxylate (1), sulfur and ethyl cyanoacetate (2) by a Gewald synthesis followed by acetylation. 4-(Coumarin-3-yl)thiophenes (6a-6j) were applied on polyester fibers as fluorescent disperse dyes and their fluorescence and dyeing properties were studied.Keywords
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