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Chiral Concave Imidazolinium Salts as Precursors to Chiral Concave N-Heterocyclic Carbenes

✍ Scribed by Ole Winkelmann; David Linder; Jérôme Lacour; Christian Näther; Ulrich Lüning

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
234 KB
Volume
2007
Category
Article
ISSN
1434-193X

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Concave Imidazolinium Salts as Precursor
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## Abstract Concave bimacrocyclic imidazolinium ions **8** have been synthesized as precursors for N‐heterocyclic carbenes **9** (NHC) in 13 to 29 % overall yields based on 2‐nitroresorcinol (**1**). As bridgeheads, 2,6‐bis(ω‐alkenyloxy)anilines **3** have been synthesized from **1**. Reaction of *

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## Abstract The behavior of new enantiopure imidazolinium salts bearing two hydroxy‐containing substituents as chiral shift reagents and as carbene precursors for diethylzinc addition to aldehydes is presented. The new hydroxy‐containing imidazolinium salts can be prepared in a few steps from amino