期刊
CHEMISTRY-AN ASIAN JOURNAL
卷 17, 期 9, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.202200042
关键词
1; 6-hydroarylation; bronsted-acid catalysis; green media; indoles; para-quinone methides
资金
- National Natural Science Foundation of China [21606080, 21908050]
- Natural Science Foundation of Hunan Province [2019JJ50203]
- Scientific Research Fund of Hunan Provincial Education Department [19A197]
- Innovation research group project of Natural Science Foundation of Hunan Province [2020JJ1004]
- National College Students Innovation and Entrepreneurship Training Program [202110543028]
- CAS-Croucher Funding Scheme for Joint Laboratories, ITC Guangdong-Hong Kong Technology Cooperation Funding Scheme (TCFS) [GHP/038/19GD]
- Hong Kong Polytechnic University [1-ZE1C]
- Endowed Professorship in Energy from Miss Clarea Au [847S]
An efficient, cheap and green protocol has been established for the highly regioselective 1,6-hydroarylation of para-quinone methides (p-QMs) with indoles at the C-3 position using phosphoric acid catalysis in water under transition-metal-free reaction conditions. A wide range of indole derivatives and p-QMs are compatible, providing good to excellent yields of the corresponding 1,6-hydroarylation products. The possible mechanism of the reaction has been explored through step-by-step control experiments, making this protocol a convenient, safe, green and feasible way for the formation of C-3 diarylmethyl functionalized indole derivatives.
An efficient, cheap and green protocol for the highly regioselective 1,6-hydroarylation of para-quinone methides (p-QMs) with indoles at the C-3 position has been established by phosphoric acid catalysis in water under transition-metal-free reaction conditions. A wide range of indole derivatives and para-quinone methides (p-QMs) are compatible for the reaction, affording the corresponding 1,6-hydroarylation products with good to excellent yields. The possible mechanism of the reaction has been explored through step-by-step control experiments. The protocol is convenient for practical applications, leading to a safe, green and feasible way for the formation of C-3 diarylmethyl functionalized indole derivatives.
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