Nitrones and nucleobase-containing spiro-isoxazolidines derived from isatin and indanone: solvent-free microwave-assisted stereoselective synthesis and theoretical calculations
作者:Loredana Maiuolo、Pedro Merino、Vincenzo Algieri、Monica Nardi、Maria Luisa Di Gioia、Beatrice Russo、Ignacio Delso、Matteo Antonio Tallarida、Antonio De Nino
DOI:10.1039/c7ra09995a
日期:——
because of their antiviral properties. However, in the literature few examples of synthesis of their precursors, oxindole-nitrones, are reported. In this paper, we initially present a rapid and efficient synthetic approach to ketonitrones by solvent-free microwave-assisted reaction between isatin or indanone derivatives and various hydroxylamines. The synthetic protocol is facile, clean, fast, high-yielding
螺-羟吲哚由于其抗病毒特性而被广泛应用。然而,在文献中,很少报道合成其前体羟吲哚-硝酮的实例。在本文中,我们最初提出了一种快速,高效的合成方法,该方法通过Isatin或茚满酮衍生物与各种羟胺之间的无溶剂微波辅助反应来合成酮硝酮。合成协议简便,干净,快速,高产量且具有立体选择性。然后,我们探索了通过无溶剂的MW辅助1,3-偶极环加成合成含核苷的螺-异恶唑烷与靛红和茚满酮核的可能性,获得了良好的收率(74-85%),以及区域和非对映选择性。