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Metal-Free,Site-Selective C-H Fluorination of Heteroarenes Under Visible Light
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作者 Cheng Huang Chang-Ming You +7 位作者 yu-shu qin Rui-Nan Ci Peng Xiao Sheng Tang Bin Liu Zhenhong Wei Li-Zhu Wu Hu Cai 《CCS Chemistry》 CSCD 2024年第7期1681-1688,共8页
The site-selective C-H fluorination of heteroarenes is a straightforward approach to accessing valuable heteroaryl fluorides but remains a formidable challenge.Herein,we report a general strategy for visible-light-ind... The site-selective C-H fluorination of heteroarenes is a straightforward approach to accessing valuable heteroaryl fluorides but remains a formidable challenge.Herein,we report a general strategy for visible-light-induced C-H fluorination of heteroarenes via the merger of N-F fluorinating reagents and silane.Electron paramagnetic resonance experiments provide evidence for the homolytic cleavage of the N-F bond under blue light-emitting diode irradiation,which is the key step in the process.This transformation is metal-free,photocatalysts-free,and site-selective under mild reaction conditions(ambient temperature,visible-light irradiation,tolerant to H2O).The robustness of this protocol has also been highlighted by late-stage modification of complex and medicinally relevant molecules. 展开更多
关键词 selective C-H fluorination heteroaryl fluorides C(sp^(2))-F bond formation PHOTOCHEMISTRY radical chemistry
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