Volume 126, Issue 14 pp. 3780-3784
Zuschrift

Copper-Catalyzed Site-Selective Intramolecular Amidation of Unactivated C(sp3)H Bonds

Dr. Xuesong Wu

Dr. Xuesong Wu

Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202 (USA)

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Yan Zhao

Yan Zhao

Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202 (USA)

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Dr. Guangwu Zhang

Dr. Guangwu Zhang

Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202 (USA)

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Prof. Dr. Haibo Ge

Corresponding Author

Prof. Dr. Haibo Ge

Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202 (USA)

Institute of Chemistry and BioMedical Sciences and School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093 (P.R. China)

Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202 (USA)Search for more papers by this author
First published: 03 March 2014
Citations: 50

We gratefully acknowledge Indiana University Purdue University Indianapolis for financial support. The Bruker 500 MHz NMR was purchased using funds from an NSF-MRI award (CHE-0619254).

Abstract

The intramolecular dehydrogenative amidation of aliphatic amides, directed by a bidentate ligand, was developed using a copper-catalyzed sp3 CH bond functionalization process. The reaction favors predominantly the CH bonds of β-methyl groups over the unactivated methylene CH bonds. Moreover, a preference for activating sp3 CH bonds of β-methyl groups, via a five-membered ring intermediate, over the aromatic sp2 CH bonds was also observed in the cyclometalation step. Additionally, sp3 CH bonds of unactivated secondary sp3 CH bonds could be functionalized by favoring the ring carbon atoms over the linear carbon atoms.

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