Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 38, Pages 10155-10159Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201403453
Keywords
dipolar cycloaddition; multicomponent reactions; organocatalysis; regioselectivity; triazole
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Funding
- University of Leuven
- FWO-Vlaanderen
- Erasmus Exchange program Experts II
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A metal-free three-component reaction to synthesize 1,4,5-trisubstituted 1,2,3-triazoles from readily available building blocks, such as aldehydes, nitroalkanes, and organic azides, is described. The process is enabled by an organocatalyzed Knoevenagel condensation of the formyl group with the nitro compound, which is followed by the 1,3-dipolar cycloaddition of the azide to the activated alkene. The reaction features an excellent substrate scope, and the products are obtained with high yield and regioselectivity. This method can be utilized for the synthesis of fused triazole heterocycles and materials with several triazole moieties.
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