Abstract
A novel palladium-catalyzed oxidative cyclopropanation of enamides and norbornenes has been developed. The reaction proceeded through palladium-catalyzed vinyl C–H bond activation of enamides followed by two migratory insertions, β-(N)H elimination and hydrolyzation cascade steps. The reaction tolerates a range of functional groups and provides an effective method for the synthesis of cyclopropane-fused norbornanes in good yields under mild conditions.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (NSFC-21622203, 21472147, 21702161), the China Postdoctoral Science Foundation Funded Project (2017M610644), and Fund of Northwest University (334100036).
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Chen, M., Zhao, MN., Zhang, YD. et al. Palladium-catalyzed oxidative cyclopropanation of enamides and norbornenes initiated by C–H activation. Sci. China Chem. 61, 695–701 (2018). https://doi.org/10.1007/s11426-017-9150-x
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DOI: https://doi.org/10.1007/s11426-017-9150-x