A Convenient Approach to 2-Aminobenzo[<Emphasis Type="Italic">b</Emphasis>]chalcogenophenes Based on Copper-Catalyzed Transformation of 4-(2-Bromophenyl)-1,2,3-chalcogenodiazoles in the Presence of a Base and Amines |
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| Authors: | E A Popova A G Lyapunova M L Petrov T L Panikorovskii D A Androsov |
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| Institution: | 1.St. Petersburg State Institute of Technology (Technical University),St. Petersburg,Russia;2.St. Petersburg State University,St. Petersburg,Russia |
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| Abstract: | The reactions of 4-(2-bromophenyl)-1,2,3-thia-and -selenadiazoles with amines in the presence of potassium carbonate and copper(I) iodide afforded 2-aminobenzob]chalcogenophenes. The corresponding thiaand selenamides, prepared by interaction of 4-(2-bromophenyl)-1,2,3-thia- and -selenadiazoles with amines in the absence of copper salt, were transformed into 2-aminobenzob]chalcogenophenes by the action of potassium carbonate and copper(I) iodide in DMF in different yields. |
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