Sodium Perborate Tetrahydrate–Mediated Transformations of 2′-Hydroxychalcones to Flavanones, Flavones, and 3′, 5′-Diiodoflavone Under Mild, Environmentally Friendly Conditions
作者:Nemai C. Ganguly、Sumanta Chandra、Sujoy Kumar Barik
DOI:10.1080/00397911.2011.633734
日期:2013.5.15
aqueous acetonitrile, and then these chalcones, upon oxidative cyclization in warm acetic acid with an excess of the same reagent, afforded flavones in acceptable yields. One-pot synthesis of 3′,5′-diiodoflavone has been accomplished by diacetoxyiodobenzene-catalyzed iodination of 2′-hydroxychalcone with tetra-n-butylammonium iodide in acetic acid in the presence of sodium perborate as a terminal oxidant
摘要 过硼酸钠四水合物已被用作亲核催化剂,用于在温水乙腈中将 2'-羟基查耳酮轻松转化为黄烷酮,然后这些查耳酮在温乙酸中用过量的相同试剂氧化环化,得到可接受的黄酮。产量。3',5'-二碘黄酮的一锅合成是通过二乙酰氧基碘苯催化 2'-羟基查尔酮与四正丁基碘化铵在乙酸中在过硼酸钠作为末端氧化剂存在下碘化来完成的。图形概要