Abstract
A ligand-free, powerful, and practical method for mono and polymethoxylation of unactivated aryl bromides has been developed; CuCl was used as catalyst, HCOOMe as cocatalyst, and methanolic MeONa as both nucleophile and solvent. This eco-friendly procedure is characterized by operational simplicity, inexpensive substrates (unactivated mono to polybromoarenes), full conversion, and direct recovery of pure MeOH.
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Acknowledgments
The authors are grateful to the National Natural Science Foundation of China (project nos 21176074 and 21476074), the Research Fund for the Doctoral Program of Higher Education of China (project no. 20130074110009), and the Shandong Rongyuan Pharmaceutical Co. Ltd. for financial support.
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Guo, Y., Ji, SZ., Chen, C. et al. A ligand-free, powerful, and practical method for methoxylation of unactivated aryl bromides by use of the CuCl/HCOOMe/MeONa/MeOH system. Res Chem Intermed 41, 8651–8664 (2015). https://doi.org/10.1007/s11164-014-1917-x
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DOI: https://doi.org/10.1007/s11164-014-1917-x