Iron-catalyzed [4 + 2] annulation of α,β-unsaturated ketoxime acetates with enaminones toward functionalized pyridines
- Jindian Duan
- Gaochen Xu
- Binsen Rong
- Huan Yan
- Sai Zhang
- Qinghuan Wu
- Ning Zhu
- Kai Guo
- College of Biotechnology and Pharmaceutical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, 211816, ChinaRead the publication that featured this abstract
The iron-catalyzed [4 + 2] annulation of α,β-unsaturated ketoxime acetates with enaminones has been developed, providing efficient access to highly substituted pyridines in moderate to good yields. Notable features of the present strategy include low-cost catalytic system, simple and mild reaction condition and wide substrate scope. Mechanistic studies reveal that FeCl2 may directly serve as a Lewis acid to activate the α,β-unsaturated ketoxime acetates for the nucleophilic addition.
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