Laboratorium für Organische Chemie, ETH-Zürich, Zürich 8093, Switzerland.
Org Lett. 2011 Oct 7;13(19):5378-81. doi: 10.1021/ol202272t. Epub 2011 Sep 9.
N-Heterocyclic carbene catalyzed aza-Claisen annulations of enals or their α'-hydroxyenone surrogates with vinylogous amides afford dihydropyridinones. The reaction proceeds with a broad range of substrates, and no nitrogen protecting group is required.
N-杂环卡宾催化烯醛或其α'-羟基烯酮类似物与烯酰胺的aza-Claisen 环合反应,得到二氢吡啶酮。该反应具有广泛的底物适用性,并且不需要氮保护基团。