Intramolecular reductive coupling reactions promoted by samarium diiodide
作者:Gary A. Molander、Caryn Kenny
DOI:10.1021/ja00203a027
日期:1989.10
Samariumdiiodide is a useful reagent for promoting intramolecular reductive coupling reactions, generating functionalized carbocycles. Ketone-olefin coupling, pinacolic coupling, and other related reductive coupling reactions are accomplished under mild conditions with samariumdiiodide. Products are accessed in high yield, and in many cases excellent stereochemical control is achieved at three contiguous
Stereocontrolled intramolecular ketone-olefin reductive coupling reactions promoted by samarium diiodide
作者:Gary A. Molander、Caryn Kenny
DOI:10.1016/s0040-4039(00)96511-0
日期:1987.1
The stereocontrolled intramolecular coupling of unsaturated β-ketoesters and β-ketoamides is reported. Good yields of highly substituted β-hydroxycyclopentanecarboxylates are generated in the process, with substantial and predictable stereochemical control at three contiguous stereocenters.
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.
MOLANDER, GARY A.;KENNY, CARYN, J. AMER. CHEM. SOC., 111,(1989) N1, C. 8236-8246