Abstract
The amide C-N cleavage has drawn a broad interest in synthetic chemistry, biological process and pharmaceutical industry. Transition-metal, luxury ligand or excess base were always vital to the transformation. Here, we developed a transition-metal-free hydrogen-bond-assisted esterification of amides with only catalytic amount of base. The proposed crucial role of hydrogen bonding for assisting esterification was supported by control experiments, density functional theory (DFT) calculations and kinetic studies. Besides broad substrate scopes and excellent functional groups tolerance, this base-catalyzed protocol complements the conventional transition-metal-catalyzed esterification of amides and provides a new pathway to catalytic cleavage of amide C-N bonds for organic synthesis and pharmaceutical industry.
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Acknowledgements
This work was supported by the National Key R&D Program of China (2016YFA0202902), the National Natural Science Foundation of China (21572036, 21871059, 21861132002), and the Department of Chemistry at Fudan University.
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Huang, C., Li, J., Wang, J. et al. Hydrogen-bond-assisted transition-metal-free catalytic transformation of amides to esters. Sci. China Chem. 64, 66–71 (2021). https://doi.org/10.1007/s11426-020-9883-3
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DOI: https://doi.org/10.1007/s11426-020-9883-3