A one-pot, two-step approach to prepare 2-tetrahydrofuran and -pyran substituted 1,3-dicarbonyl compounds by PhI=NTs-mediated amination/Brønsted base-catalyzed cross dehydrogenative coupling (CDC) reaction of the cyclic ether and 1,3-dicarbonyl derivative under mild conditions is reported. The reaction is compatible with a variety of cyclic ethers and 1,3-dicarbonyl compounds, affording the corresponding coupled products in moderate to good yields of up to 80% over two steps.
Iron‐Catalyzed CC Bond Formation by Direct Functionalization of CH Bonds Adjacent to Heteroatoms
作者:Zhiping Li、Rong Yu、Haijun Li
DOI:10.1002/anie.200802215
日期:2008.9.15
Addition of carbon nucleophiles to cyclic N-acyliminium and oxocarbenium ions under solvent-free conditions
作者:Luiz Antonio F. de Godoy、Nilton Soares Camilo、Ronaldo Aloise Pilli
DOI:10.1016/j.tetlet.2006.09.023
日期:2006.11
The InCl3-catalyzed addition of carbon nucleophiles to cyclic N-acyliminium and oxocarbenium ions under solvent-free conditions at room temperature is described. The corresponding-substituted heterocycles were obtained in moderate to excellent yields. (c) 2006 Elsevier Ltd. All rights reserved.
Oxonium ions in organic synthesis: condensation of 2,3-dihydrofuran and 3,4-dihydro-2H-pyran with 1,3-dicarbonyl compounds