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In-Depth Assessment of the Palladium-Catalyzed Fluorination of Five-Membered Heteroaryl Bromides

Author(s)
Milner, Phillip John; Yang, Yang; Buchwald, Stephen Leffler
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Abstract
A thorough investigation of the challenging Pd-catalyzed fluorination of five-membered heteroaryl bromides is presented. Crystallographic studies and density functional theory (DFT) calculations suggest that the challenging step of this transformation is C–F reductive elimination of five-membered heteroaryl fluorides from Pd(II) complexes. On the basis of these studies, we have found that various heteroaryl bromides bearing phenyl groups in the ortho position can be effectively fluorinated under catalytic conditions. Highly activated 2-bromoazoles, such as 8-bromocaffeine, are also viable substrates for this reaction.
Date issued
2015-08
URI
http://hdl.handle.net/1721.1/110461
Department
Massachusetts Institute of Technology. Department of Chemistry
Journal
Organometallics
Publisher
American Chemical Society (ACS)
Citation
Milner, Phillip J., Yang Yang, and Stephen L. Buchwald. “In-Depth Assessment of the Palladium-Catalyzed Fluorination of Five-Membered Heteroaryl Bromides.” Organometallics 34.19 (2015): 4775–4780. © 2015 American Chemical Society
Version: Final published version
ISSN
0276-7333
1520-6041

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