Palladium catalyzed annulation of benzylamines and arynes via C–H activation to construct 5,6-dihydrophenanthridine derivatives
作者:Manjoorahmed Asamdi、Prakashsingh M. Chauhan、Janki J. Patel、Kishor H. Chikhalia
DOI:10.1016/j.tet.2019.05.011
日期:2019.6
and versatile strategy employing palladium catalyst to synthesize 5,6-dihydrophenanthridine derivatives by annulation of benzylamines and arynes through C–Hactivation has been reported. This is promising one pot methodology which includes the use of Kobayashi's aryne precursor to construct plethora of 5,6-dihydrophenanthridine derivatives in moderate to good yield.
Selective access to dihydrophenanthridines and phenanthridinones <i>via</i> cyclisation of aryl amines onto <i>N</i>-tethered arynes
作者:Weitao Sun、Maria Uttendorfer、Fahima I. M. Idiris、A. Yannic R. Werling、Khushal Siddiq、Christopher R. Jones
DOI:10.1039/d3cc03027j
日期:——
5,6-Dihydrophenanthridines are prepared from aryl amines via intramolecular addition to N-tethered arynes under mild conditions. A new o-silylaryl triflate precursor was developed to increase reactivity and enable electron-rich and electron-poor aryl amines to undergo cyclisation. A complete switch in product selectivity occurs when the reaction is conducted in air, affording the corresponding phe
5,6-二氢菲啶是由芳基胺在温和条件下通过分子内加成至N-束缚芳烃制备的。开发了一种新的邻甲硅烷基芳基三氟甲磺酸酯前体,以提高反应性并使富电子和缺电子芳胺能够进行环化。当反应在空气中进行时,产物选择性发生完全转变,在其他相同的反应条件下提供相应的菲啶-6(5 H )-酮作为唯一产物。