Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 20, Issue 8, Pages 2145-2148Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201304666
Keywords
asymmetric catalysis; cycloaddition; organocatalysis; trienamines; vinylogy
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Funding
- Spanish MICINN [CTQ2011-22790]
- Spanish MICINN (Juan de la Cierva contract)
- Basque Government [Grupos IT328-10]
- UPV/EHU [EHUA12/09, UFI QOSYC11/22]
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Unconjugated 2,5-dienals are more reactive substrates than the corresponding fully conjugated ,,,-unsaturated aldehydes towards organocatalytic activation through trienamine intermediates. This difference in reactivity has been demonstrated in the Diels-Alder reaction with nitroalkenes, a reaction that proceeds with clean ,epsilon-selectivity to afford the final products in high yields and stereoselectivities, the related polyconjugated 2,4-dienals being completely unreactive.
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