Aryloxide‐Facilitated Catalyst Turnover in Enantioselective α,β‐Unsaturated Acyl Ammonium Catalysis

Abstract: A new general concept for α,β‐unsaturated acyl ammonium catalysis is reported that uses p‐nitrophenoxide release from an α,β‐unsaturated p‐nitrophenyl ester substrate to facilitate catalyst turnover. This method was used for the enantioselective isothiourea‐catalyzed Michael addition of nitroalkanes to α,β‐unsaturated p‐nitrophenyl esters in generally good yield and with excellent enantioselectivity (27 examples, up to 79 % yield, 99:1 er). Mechanistic studies identified rapid and reversible catalyst acylation by the α,β‐unsaturated p‐nitrophenyl ester, and a recently reported variable‐time normalization kinetic analysis method was used to delineate the complex reaction kinetics.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Aryloxide‐Facilitated Catalyst Turnover in Enantioselective α,β‐Unsaturated Acyl Ammonium Catalysis ; volume:129 ; number:40 ; year:2017 ; pages:12450-12455 ; extent:6
Angewandte Chemie ; 129, Heft 40 (2017), 12450-12455 (gesamt 6)

Creator
Matviitsuk, Anastassia
Greenhalgh, Mark
Antúnez, Diego‐Javier Barrios
Slawin, Alexandra M. Z.
Smith, Andrew D.

DOI
10.1002/ange.201706402
URN
urn:nbn:de:101:1-2022091219520113323943
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
15.08.2025, 7:20 AM CEST

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Associated

  • Matviitsuk, Anastassia
  • Greenhalgh, Mark
  • Antúnez, Diego‐Javier Barrios
  • Slawin, Alexandra M. Z.
  • Smith, Andrew D.

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