1. ChemInform Abstract: Highly Enantioselective Nucleophilic Dearomatization of Pyridines by Anion-Binding Catalysis
- Author
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Mercedes Zurro, Theresa Fischer, Olga García Mancheño, and Soeren Asmus
- Subjects
chemistry.chemical_compound ,Nucleophile ,Chemistry ,Organocatalysis ,Triazole ,Enantioselective synthesis ,Regioselectivity ,General Medicine ,Pyridinium ,Anion binding ,Combinatorial chemistry ,Catalysis - Abstract
The asymmetric dearomatization of N-heterocycles is an important synthetic method to gain bioactive and synthetically valuable chiral heterocycles. However, the catalytic enantio- and regioselective dearomatization of the simplest six-membered-ring N-heteroarenes, the pyridines, is still very challenging. The first anion-binding-catalyzed, highly enantioselective nucleophilic dearomatization of pyridines with triazole-based H-bond donor catalysts is presented. Contrary to other more common NH-based H-bond donors, this type of organocatalyst shows a prominent higher C2-regioselectivity and is able to promote high enantioinductions via formation of a close chiral anion-pair complex with a preformed N-acyl pyridinium ionic intermediate. This method offers a straightforward and useful synthetic approach to chiral N-heterocycles from abundant and readily available pyridines.
- Published
- 2015
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