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Dienamine catalysis: organocatalytic asymmetric gamma-amination of alpha,beta-unsaturated aldehydes
Center for Catalysis, Department of Chemistry, Aarhus University.
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2006 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 128, no 39, 12973-12980 p.Article in journal (Refereed) Published
Abstract [en]

A new concept in organocatalysis is presented, the direct asymmetric gamma-functionalization of alpha,beta-unsaturated aldehydes. We disclose that secondary amines can invert the usual reactivity of alpha,beta-unsaturated aldehydes, enabling a direct gamma-amination of the carbonyl compound using azodicarboxylates as the electrophilic nitrogen-source. The scope of the reaction is demonstrated for the enantioselective gamma-amination of different alpha,beta-unsaturated aldehydes, giving the products in moderate to good yields and with high enantioselectivities up to 93% ee. Experimental investigations and DFT calculations indicate that the reaction might proceed as a hetero-Diels-Alder cycloaddition reaction. Such a mechanism can explain the "unexpected" stereochemical outcome of the reaction.

Place, publisher, year, edition, pages
2006. Vol. 128, no 39, 12973-12980 p.
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Chemical Sciences
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URN: urn:nbn:se:uu:diva-121906DOI: 10.1021/ja064637fPubMedID: 17002394OAI: oai:DiVA.org:uu-121906DiVA: diva2:306910
Available from: 2010-03-31 Created: 2010-03-31 Last updated: 2017-12-12

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Dinér, Peter

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