Journal
TETRAHEDRON LETTERS
Volume 45, Issue 18, Pages 3677-3680Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2004.02.160
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The reactivity of ethyl 3-bromodifluoromethyl-3-benzyloxyacrylate as a novel gem-difluoromethylene synthon was investigated. F-19 NMR spectra of its zinc reagent in THF and DMF indicate unambiguously that the active species exists as the gamma-carbon metallated form. Moreover, promoted by zinc or TDAE, a complete control of the addition reaction mode (alpha or gamma) of this acrylate with aldehydes can be accomplished. (C) 2004 Elsevier Ltd. All rights reserved.
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