The copper-catalyzed [4 + 2] annulation of α,β-unsaturated ketoximeacetates with 1,3-dicarbonyl compounds for the synthesis of three classes of structurally diverse pyridines has been developed. This method employs 1,3-dicarbonyl compounds as C2 synthons and enables the synthesis of multifunctionalized pyridines with diverse electron-withdrawing groups in moderate to good yields. The mechanistic investigation
Organocatalytic Synthesis of Highly Functionalized Pyridines at Room Temperature
作者:Zugui Shi、Teck-Peng Loh
DOI:10.1002/anie.201301519
日期:2013.8.12
Amines by all means: A unique aza‐Rauhut–Currier/cyclization/desulfonation cascade reaction between allenoates and N‐sulfonyl‐1‐aza‐1,3‐dienes, catalyzed by the readily available diamine TMEDA, has been developed. This strategy provides facile access to a broad range of valuable highlyfunctionalized pyridines in good yields under very mild reaction conditions.