Abstract
C–H functionalization represents a promising approach for the synthesis of complex molecules. Instead of relying on modifying the functional groups present in a molecule, the synthetic sequence is achieved by carrying out selective reactions on the C–H bonds, which traditionally would have been considered to be the unreactive components of a molecule. A major challenge is to design catalysts to control both the site- and stereoselectivity of the C–H functionalization. We have been developing dirhodium catalysts with different selectivity profiles in C–H functionalization reactions with donor/acceptor carbenes as reactive intermediates. Here we describe a new dirhodium catalyst capable of the functionalization of non-activated primary C–H bonds with high levels of site selectivity and enantioselectivity.
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Acknowledgements
Financial support was provided by the National Science Foundation (NSF) via the CCI Center for Selective C–H Functionalization (CHE-1700982). D.G.M. acknowledges NSF MRI-R2 grant CHE-0958205 and the use of the resources of the Cherry Emerson Center for Scientific Computation. Funds to purchase the NMR and X-ray spectrometers used in these studies were supported by the NSF (CHE 1531620 and CHE 1626172). The authors thank J. Bacsa for the X-ray structure determinations.
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K.L. and H.M.L.D. designed the synthetic experiments, K.L. performed the synthetic experiments, Y.-F.Y., Y.L., J.S., D.G.M. and K.N.H. conducted the computational studies, and K.L., K.N.H and H.M.L.D. prepared the manuscript.
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H.M.L.D. is a named inventor on a patent entitled ‘Dirhodium catalyst compositions and synthetic processes related thereto’ (US 8,974,428, issued March 10, 2015). The other authors declare no competing interests.
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Supplementary information
Supplementary information
Supplementary experimental and computational details
Crystallographic data
CIF for compound 11; CCDC reference: 1551026
Crystallographic data
Structure factors for compound 11; CCDC reference 1551026
Crystallographic data
CIF for catalyst F; CCDC reference: 1552206
Crystallographic data
Structure factors for catalyst F; CCDC reference 1552206
Computational data
Calculated C2 symmetric structure for catalyst I
Computational data
Calculated C4 symmetric structure for catalyst I
Computational data
Calculated C4a symmetric structure for catalyst I
Computational data
Calculated D2 symmetric structure for catalyst I
Computational data
Calculated C2 symmetric carbene structure
Computational data
Calculated C4 symmetric carbene structure for catalyst
Computational data
Calculated transition state TS1
Computational data
Calculated transition state TS2
Computational data
Calculated transition state TS3
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Liao, K., Yang, YF., Li, Y. et al. Design of catalysts for site-selective and enantioselective functionalization of non-activated primary C–H bonds. Nature Chem 10, 1048–1055 (2018). https://doi.org/10.1038/s41557-018-0087-7
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DOI: https://doi.org/10.1038/s41557-018-0087-7
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