期刊
ORGANIC CHEMISTRY FRONTIERS
卷 8, 期 20, 页码 5716-5721出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1qo00921d
关键词
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资金
- Fundamental Research Funds for the Central Universities [KYZ201751]
- National Natural Science Foundation of China [32061143045, 81903498]
The article presents a novel method for synthesizing highly functionalized pyrrole compounds, with the key to success lying in the precise capture of the carbocation intermediate by utilizing enaminones and anilines, allowing the amination reaction to proceed smoothly at specific positions.
Given the importance of pyrroles in pharmaceuticals, agrochemicals and functional materials, the development of efficient strategies for their construction continues to be a hot area. Herein, we present a novel BF3 center dot Et2O mediated four component reaction of 2,3-diketoesters, anilines and enaminones, providing highly functionalized pyrroles and pyrrole-fused piperidin-4-ones in moderate to good yields. The key to success lies in the utilization of enaminone as the substrate and precise capture of the carbocation intermediate by anilines, allowing the amination to occur at the 5-position smoothly. This strategy is potentially applicable to diverse nucleophilic reagents. Moreover, an intramolecular version of this strategy can be utilized to form fused heterocycles.
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