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.
FeCl3-catalyzed addition of nitrogen and 1,3-dicarbonyl nucleophiles to olefins
作者:Christophe Dal Zotto、Julien Michaux、Araceli Zarate-Ruiz、Eric Gayon、David Virieux、Jean-Marc Campagne、Vincent Terrasson、Grégory Pieters、Anne Gaucher、Damien Prim
DOI:10.1016/j.jorganchem.2010.09.031
日期:2011.1
A direct intermolecular addition of nitrogen and 1,3-dicarbonyl nucleophiles to stabilized double bonds (styrenes, 1,3-dienes, enol-ethers, sugars..) in the presence of green and inexpensive FeCl3 catalyst is described. (C) 2010 Elsevier B.V. All rights reserved.
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