The N,N-diethylpropylamine supported on amorphous silica (KG-60-NEt2) catalyses the formation of carbon-carbon bonds by nitroalkanes through both the nitroaldol (Henry) and Michael reactions. The catalyst shows general utility with a variety of electrophilic acceptors. Moreover, the catalyst can be reused for two further cycles without loss of the activity. (C) 2003 Published by Elsevier Science Ltd.
Cetyltrimethylammonium hydroxide (CTAOH) as a general, ecofriendly catalyst for the formation of carbon–carbon bond through nitroalkanes
作者:Roberto Ballini、Dennis Fiorini、Maria Victoria Gil、Alessandro Palmieri
DOI:10.1016/j.tet.2004.01.067
日期:2004.3
Nitroalkanes have been found to give good yields in Michael and nitroaldol (Henry) reactions by the use of a catalytic amount (10 mol%) of CTAOH. at room temperature and under solvent free conditions and in very short reaction times. The methods do not need a large excess of the nitroalkanes and show good chemoselectivity toward further functionalities. (C) 2004 Elsevier Ltd. All rights reserved.
Ionic Liquids Made with Dimethyl Carbonate: Solvents as well as Boosted Basic Catalysts for the Michael Reaction
introduces neat NMR spectroscopy of the ionicliquids as a probe for solute–solvent interactions as well as a tool for characterisation. Our studies show that high catalytic efficacy of functional ionicliquids can be achieved by integrating their greensynthesis, along with a fine‐tuning of their structure. Demonstrating that ionicliquid solvents can be made by a truly green procedure, and that their properties