Efficient Synthesis of Nitroflavones by Cyclodehydrogenation of 2′-Hydroxychalcones and by the Baker-Venkataraman Method |
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| Authors: | Ana I R N A Barros Artur M S Silva |
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| Institution: | (1) Chemistry Department, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal;(2) Chemistry Department, University of Aveiro, Aveiro, Portugal |
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| Abstract: | Summary. Several nitroflavone derivatives were synthesized by cyclodehydrogenation of 2′-hydroxychalcones and by the Baker-Venkataraman approach, starting from 2′-hydroxyacetophenones and benzoic acid derivatives. Nitroflavones synthesised by the first synthetic
approach were obtained in better global yields than those obtained by the later method. The structures of all new compounds
were elucidated by microanalyses, 1D and 2D NMR, IR, and mass spectroscopic measurements. |
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| Keywords: | , Nitroflavones, Cyclodehydrogenation, 2′,-Hydroxychalcones, Baker-Venkataraman method, NMR spectroscopy, |
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