A novel reaction of the ‘Huisgen zwitterion’ with benzofuran-2,3-diones: an efficient strategy for the synthesis of spirocyclic benzofuran-2-one derivatives
作者:Ze-Dong Wang、Nan Dong、Feng Wang、Xin Li、Jin-Pei Cheng
DOI:10.1016/j.tetlet.2013.07.129
日期:2013.10
nitrogen-based nucleophile generated from azodicarboxylate and triphenylphosphine displayed good reactivity toward benzofuran-2,3-diones to generate a variety of spirocyclic benzofuran-2-one derivatives. The reactions accommodate a number of benzofuran-2,3-diones and different dialkylazodicarboxylates to give the enriched functionalized 3-spirooxadiazole benzofuran-2-ones with moderate to good yields (up
由偶氮二羧酸盐和三苯基膦生成的氮基亲核试剂对苯并呋喃-2,3-二酮显示出良好的反应活性,可生成多种螺环苯并呋喃-2-酮衍生物。该反应容纳许多苯并呋喃-2,3-二酮和不同的二烷基偶氮二羧酸酯,以中等至良好的产率(高达93%)得到富集的官能化的3-螺并恶二唑苯并呋喃-2-酮。