Synthesis 2022; 54(07): 1745-1752
DOI: 10.1055/s-0037-1610788
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Quaternary Phosphonium Carboxylates: Structure, Dynamics and Intriguing Olefination Mechanism

a   Department of Chemical Biology, Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124 Braunschweig, Germany
b   School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
,
Helge Müller-Bunz
b   School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
,
b   School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
,
b   School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
› Institutsangaben


Abstract

We have earlier shown how the Wittig chemistry can be done using novel Eigenbase phosphonium carboxylate reagents. Here we discuss the phenomenon of ion pairing, their solution tautomerism, solid-state structure, and mechanistic aspects of olefination. The results point to a complex process involving unfamiliar H-bond-driven ion-pair equilibria followed by standard Wittig reaction steps.

Supporting Information



Publikationsverlauf

Eingereicht: 09. August 2021

Angenommen nach Revision: 05. November 2021

Artikel online veröffentlicht:
21. Dezember 2021

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      Kinetics techniques lead to lower pK a values:
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