Abstract
Since the first report of sodium trifluoromethanesulfinate (CF3SO2Na) as an electrophilic trifluoromethylthiolation reagent in 2015, there has been no breakthrough in research in this field. Herein, we disclose an unprecedented usage of CF3SO2Na as a radical trifluoromethylthiolation reagent. A photocatalyzed ditrifluoromethylthiolation of alkenes with CF3SO2Na in the presence of PPh3 and catalytic copper has been developed. Interestingly, either Ir[(p-Fppy)2(bpy)]PF6 or Ir(ppy)3 could facilitate this transformation. Mechanistic studies indicate that initiation of the radical chain proceeded via two different photocatalytic quenching mechanisms. This protocol provides a practical method for the construction of diverse vicinal ditrifluoromethylthiolated compounds.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (22078161, 22108124), the Postdoctoral Science Foundation Funded Project (2019M661848), the Fundamental Research Funds for the Central Universities (30922010403), the Priority Academic Program Development of Jiangsu Higher Education Institutions, and the Center for Advanced Materials and Technology in Nanjing University of Science and Technology.
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Chen, F., Jiang, L., Hu, C. et al. Photocatalyzed ditrifluoromethylthiolation of alkenes with CF3SO2Na. Sci. China Chem. 67, 587–594 (2024). https://doi.org/10.1007/s11426-023-1781-6
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DOI: https://doi.org/10.1007/s11426-023-1781-6