Rapid Access to 3-Substituted Pyridines and Carbolines via a Domino, Copper-free, Palladium-Catalyzed Sonogashira Cross-Coupling/6π-Aza Cyclization Sequence
作者:Dilipkumar Uredi、Amarender Goud Burra、E. Blake Watkins
DOI:10.1021/acs.joc.1c02034
日期:2021.12.17
Herein, we report a one-pot, three-component method for the preparation of 3-substituted pyridines and carbolines via copper-free, palladium-catalyzed Sonogashira cross-coupling with aryl iodides, followed by 6π-aza cyclization. This arylation cross-coupling/annulation cascade provides easy access to substituted, fused pyridines from readily available substrates in good yields (67–92%) with complete
在此,我们报道了一种一锅三组分方法,通过无铜、钯催化的 Sonogashira 与芳基碘化物交叉偶联,然后进行 6π-氮杂环化,制备 3-取代的吡啶和咔啉。这种芳基化交叉偶联/环化级联提供了从容易获得的底物以良好的收率 (67–92%) 和完全的选择性轻松获得取代的稠合吡啶。