Organocatalytic Enantioselective Protonation of Silyl Enolates Mediated by Cinchona Alkaloids and a Latent Source of HF
Identifieur interne : 000B34 ( France/Analysis ); précédent : 000B33; suivant : 000B35Organocatalytic Enantioselective Protonation of Silyl Enolates Mediated by Cinchona Alkaloids and a Latent Source of HF
Auteurs : Thomas Poisson ; Vincent Dalla [France] ; Francis Marsais ; Georges Dupas ; Sylvain Oudeyer ; Vincent Levacher [France]Source :
- Angewandte Chemie [ 0044-8249 ] ; 2007-09-17.
English descriptors
Abstract
„Nach eigenem Ermessen“ liefert eine latente HF‐Quelle das aktive katalytische Wasserstofffluorid‐Salz 1‐HF für die enantioselektive organokatalytische Protonierung von Silylenolaten mithilfe leicht verfügbarer Cinchona‐Alkaloid‐Katalysatoren (1). Dieser metallfreie Ansatz führt zum hoch enantioselektiven Protonentransfer (bis 92 % ee) unter milden, neutralen Bedingungen (siehe Schema, TMS=Trimethylsilyl).
Url:
DOI: 10.1002/ange.200701683
Affiliations:
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<front><div type="abstract">„Nach eigenem Ermessen“ liefert eine latente HF‐Quelle das aktive katalytische Wasserstofffluorid‐Salz 1‐HF für die enantioselektive organokatalytische Protonierung von Silylenolaten mithilfe leicht verfügbarer Cinchona‐Alkaloid‐Katalysatoren (1). Dieser metallfreie Ansatz führt zum hoch enantioselektiven Protonentransfer (bis 92 % ee) unter milden, neutralen Bedingungen (siehe Schema, TMS=Trimethylsilyl).</div>
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