Synthesis 2016; 48(19): 3317-3330
DOI: 10.1055/s-0035-1561487
paper
© Georg Thieme Verlag Stuttgart · New York

Stereodivergent Hydrosilylation, Hydrostannylation, and Hydrogermylation of α-Trifluoromethylated Alkynes and Their Synthetic Applications

Cédric Tresse
a   Laboratoire de Chimie Organique et Bioorganique, Université de Haute-Alsace, Institut Donnet, 3bis rue Alfred Werner, 68093 Mulhouse, France
,
Stéphane Schweizer
a   Laboratoire de Chimie Organique et Bioorganique, Université de Haute-Alsace, Institut Donnet, 3bis rue Alfred Werner, 68093 Mulhouse, France
,
Philippe Bisseret
b   Laboratoire de Chimie Moléculaire, Université de Strasbourg, CNRS UMR 7509, ECPM, 25 rue Becquerel, 67087 Strasbourg, France   Email: n.blanchard@unistra.fr
,
Jacques Lalevée
c   Institut de Science des Matériaux de Mulhouse, Université de Haute-Alsace, CNRS UMR 7361, 15 rue Jean Starcky, 68057 Mulhouse, France
,
Gwilherm Evano
d   Laboratoire de Chimie Organique, Service de Chimie et PhysicoChimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06, 1050 Bruxelles, Belgium
,
Nicolas Blanchard*
b   Laboratoire de Chimie Moléculaire, Université de Strasbourg, CNRS UMR 7509, ECPM, 25 rue Becquerel, 67087 Strasbourg, France   Email: n.blanchard@unistra.fr
› Author Affiliations
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Publication History

Received: 20 May 2016

Accepted after revision: 08 June 2016

Publication Date:
22 July 2016 (online)


Dedicated to the memory of Jean-François Normant, an outstanding scientist and artist

Abstract

Stereoselective hydrometalation reactions of aryl- and alkyl-substituted trifluoromethylated alkynes with triethylsilane, tributylstannane, and triphenylgermane have been investigated. (E)-α-CF3-Vinylsilanes, -stannanes, and -germanes were obtained under palladium-catalyzed conditions whereas the corresponding (Z)-α-CF3-vinylgermanes were obtained under radical conditions. These reactions proceed in good to excellent yields and possess a broad functional group tolerance. Applications of the (Z)- and (E)-α-CF3-vinylgermanes in palladium-catalyzed cross-coupling reactions with aryl halides having diverse electronic requirements were also investigated. The corresponding (Z)- and (E)-α-CF3-styrenes were obtained as single isomers, thus demonstrating the utility of these versatile synthons for the synthesis of stereodefined trifluoromethylated alkenes.

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