A new diastereoselective intramolecular electroreductive coupling of unsaturated β-ketoesters and β-ketoamides in ionic liquids at a tin cathode
作者:Ashok K. Yadav、Meera Manju、Manoj Kumar、Tripti Yadav、Renuka Jain
DOI:10.1016/j.tetlet.2008.07.076
日期:2008.9
The diastereoselective intramolecular electroreductive coupling of several beta-ketoesters and beta-ketoamides has been accomplished at a tin cathode in ionic liquids and isopropanol (9:1). The ionic liquids used are 1-butyl-3-methylimidazolium bromide [BMIM]Br, 1-butyl-3-methylimidazolium tetrafluoroborate [BMIM]BF4, 1-methoxyethyl-3-methylimidazolium trifluoroacetate [MOEMIM]CF3COO and 1-methoxyethyl-3-methylimidazolium mesylate [MOEMIM]Ms. This methodology offers a clean and green process for the synthesis of functionalized carbocycles in good yields with excellent stereochemical control at three stereogenic centres. (C) 2008 Elsevier Ltd. All rights reserved.
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