期刊
ORGANIC LETTERS
卷 19, 期 8, 页码 1958-1961出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.7b00292
关键词
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资金
- National Natural Science Foundation of China [21572078, 21372095, 21402061]
- Young Talent Key Project of Anhui Province [gxyqZD2016411]
- Natural Science Foundation of Anhui [1708085MB45]
A highly regioselective [2 + 2 + 2] cyclization of aromatic alkynes with nitriles is developed for the preparation of 2,3,6-trisubstituted pyridines under visible-light irradiation using a pyrylium salt as the photoredox catalyst. This cycloaddition is achieved through a photooxidative single-electron-transfer process at room temperature and under metal-free conditions. A variety of aromatic alkynes and nitriles are employed to furnish the annulation products in good yields.
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