Effect of Lewis acids on the Diels–Alder reaction in ionic liquids with different activation modes |
| |
Authors: | Ana Vidiš Ernst Küsters Gottfried Sedelmeier Paul J Dyson |
| |
Institution: | 1. Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne, (EPFL), CH–1015 Lausanne, Switzerland;2. Novartis Pharma AG, WSJ‐145.6.54, CH‐4002 Basel, Switzerland |
| |
Abstract: | The Diels–Alder reaction has been examined in room temperature ionic liquids with high molar concentrations of Lewis acids under various conditions. A molar ratio of 10% catalyst gave a large increase in the selectivity and the yield of the reaction. The effect of catalysts on reaction rates was also examined under 100 MPa of pressure which leads to modest improvements in reaction rates. Ultrasound and microwave dielectric heating were also shown to improve the rate and, to a minor extent, selectivity of the examined reactions. Copyright © 2008 John Wiley & Sons, Ltd. |
| |
Keywords: | ionic liquids Diels– Alder reaction Lewis acid catalysts high pressure infrared spectroscopy ultrasound microwave dielectric heating |
|
|