Rhodium-Catalyzed Sequential Allylic Amination and Olefin Hydroacylation Reactions: Enantioselective Synthesis of Seven-Membered Nitrogen Heterocycles
作者:Jeffrey S. Arnold、Edward T. Mwenda、Hien M. Nguyen
DOI:10.1002/anie.201310354
日期:2014.4.1
Dynamic kinetic asymmetric amination of branched allylic acetimidates has been applied to the synthesis of 2‐alkyl‐dihydrobenzoazepin‐5‐ones. These seven‐membered‐ring aza ketones are prepared in good yield with high enantiomeric excess by rhodium‐catalyzed allylic substitution with 2‐amino aryl aldehydes followed by intramolecularolefin hydroacylation of the resulting alkenals. This two‐step procedure