Synthesis of 2,3-bis-organochalcogenyl-benzo[<i>b</i>]chalcogenophenes promoted by Oxone®
作者:Gelson Perin、Liane K. Soares、Paola S. Hellwig、Marcio S. Silva、José S. S. Neto、Juliano A. Roehrs、Thiago Barcellos、Eder J. Lenardão
DOI:10.1039/c9nj00526a
日期:——
We report here an alternative and tunable metal-free synthesis of benzo[b]chalcogenophenes via the electrophilic cyclization of 2-functionalized chalcogenoalkynes promoted by Oxone®. The use of mild reaction conditions, efficiency and generality are characteristics of this new approach, which was suitable to convert different diselenides and 2-functionalized chalcogenoalkynes into a total of twenty-two
我们在这里报告苯并[的替代和可调不含金属的合成b ] chalcogenophenes经由通过提升的冰冷的2-官能chalcogenoalkynes亲电环化反应。该新方法的特点是使用温和的反应条件,效率和通用性,适用于将不同的二硒化物和2-官能化硫属炔烃转化为总共22种2,3,3-双-有机och基-苯并[ b ]硫属oph烯,其中十八个是第一次合成。在Pd催化的与苯乙炔的反应中,将新型化合物2-(丁基硒基)-3-(苯基硒基)苯并呋喃用作底物,以高收率获得Sonogashira的偶联衍生物。