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Transition metal-free stereospecific access to (E)-(1-fluoro-2-arylvinyl)phosphine borane complexes

Abstract : This work describes the first transition metal-free stereospecific synthesis of (E)-(1-fluoro-2-arylvinyl)phosphine boranes through the addition of diarylphosphine-boranes to gem-bromofluoroalkenes in the presence of a base at room temperature. The reaction proceeds well under very mild conditions and tolerates a variety of functionalities. Scope and limitations of the reaction are discussed. Mechanistic investigations have been undertaken and revealed that the reaction takes place through an SRN1 mechanism. The formation of the fluorinated vinyl radical has been evidenced by electron paramagnetic resonance (EPR) experiment.
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Contributor : Jocelyne Levillain Connect in order to contact the contributor
Submitted on : Thursday, July 19, 2018 - 11:11:31 AM
Last modification on : Wednesday, December 1, 2021 - 3:32:14 PM



Kevin Rousée, Xavier Pannecoucke, A.-C. Gaumont, J.-F. Lohier, F. Morlet-Savary, et al.. Transition metal-free stereospecific access to (E)-(1-fluoro-2-arylvinyl)phosphine borane complexes. Chemical Communications, Royal Society of Chemistry, 2017, 53 (12), pp.2048-2051. ⟨10.1039/C6CC09673E⟩. ⟨hal-01844270⟩



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