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Synthesis 2008(16): 2636-2644
DOI: 10.1055/s-2008-1067194
DOI: 10.1055/s-2008-1067194
SPECIALTOPIC
© Georg Thieme Verlag
Stuttgart ˙ New York
Iron-Catalyzed Alkenylation of Grignard Reagents by Enol Phosphates
Further Information
Received
20 March 2008
Publication Date:
24 July 2008 (online)
Publication History
Publication Date:
24 July 2008 (online)
Abstract
Stereoselective preparation of trisubstituted olefins can be easily performed from an Z/E-mixture of enol phosphates by reacting only the E-isomer with a Grignard reagent in the presence of Fe(acac)3. This procedure combines a kinetic differentiation and a stereoselective reaction. The coupling is very chemoselective in the presence of an alkyl chloride, an ester, a ketone or a nitrile.
Key words
cross-coupling - Grignard reactions - iron - alkenes - stereoselectivity
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