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Issue 10, 2017
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Asymmetric SN2′-type C–H functionalization of arenes with propargylic alcohols

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Abstract

Herein we present the first example of transition metal-mediated stereodefined β-OH elimination, an atom economical [Cp*RhCl2]2-catalyzed SN2′-type coupling between easily available arenes and non-terminal tertiary 2-alkynylic alcohols at rt affording fully substituted allenes with H2O as the only by-product. When optically active propargylic alcohols were used, asymmetric allenylation was realized with perfect chirality transfer. It is unveiled that the reversed regioselectivity for the C–C triple bond insertion is induced by the steric effect of the tertiary carbon center as well as the weak coordination nature of the hydroxyl oxygen with Rh, which is also responsible for the stereospecificity of the rather uncommon β-OH elimination forming allenes.

Graphical abstract: Asymmetric SN2′-type C–H functionalization of arenes with propargylic alcohols

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Publication details

The article was received on 16 Jul 2017, accepted on 14 Aug 2017 and first published on 15 Aug 2017


Article type: Research Article
DOI: 10.1039/C7QO00588A
Citation: Org. Chem. Front., 2017,4, 2002-2007
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    Asymmetric SN2′-type C–H functionalization of arenes with propargylic alcohols

    S. Wu, X. Huang, C. Fu and S. Ma, Org. Chem. Front., 2017, 4, 2002
    DOI: 10.1039/C7QO00588A

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