N‐Heterocyclic Carbenes as Efficient Organocatalysts for CO2 Fixation Reactions
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- 19 May 2009
- journal article
- research article
- Published by Wiley in Angewandte Chemie International Edition in English
- Vol. 48 (23) , 4194-4197
- https://doi.org/10.1002/anie.200901399
Abstract
Getting a fix: N‐heterocyclic carbenes (NHCs) and NHC–CO2 adducts serve as potent organocatalysts for carbonate synthesis by the addition of a CO2 unit to propargylic alcohols or epoxides under mild and solvent‐free reaction conditions (see scheme). The enhanced Lewis basicity of imidazol‐2‐ylidenes bearing electron‐donating alkyl groups on the nitrogen atoms leads to utilizing CO2 as a nucleophilic fragment in the chemical fixation processes.Keywords
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