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- W2039795114 abstract "Abstract Preliminary results on the mechanism of the asymmetricphosphination involving an achiral alkenyl triflate (cyclohexenyl triflate) and a secondary phosphane–borane, (methyl)phenylphosphane–borane ( 1 ) are reported. A catalytic cycle is proposed based on the variable‐temperature 31 P NMR characterization of the individual steps (oxidative addition, transmetallation and reductive elimination). Each likely intermediate involved in this asymmetric C–P coupling reaction has been identified and characterized. Hence, cationic oxidative addition complex 3 has been readily synthesized and engaged in the stoichiometric reaction with highly enantio‐enriched secondary phosphane–borane ( S P )‐ 1 enabling to isolate the corresponding diastereomerically pure transmetallation adduct ( S , S , R P )‐ 5 . Its structure has been confirmed by X‐ray crystallography. Its decomposition by reductive elimination affords the highly enantio‐enriched coupling product ( S P )‐ 2 . This study also provides information on the origin of the enantioselectivity." @default.
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- W2039795114 date "2011-01-12" @default.
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- W2039795114 title "Mechanistic Insights into the Palladium‐Catalysed Asymmetric Phosphination of Cyclohexenyl Triflate" @default.
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- W2039795114 doi "https://doi.org/10.1002/ejic.201000987" @default.
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