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Iron(I) in Negishi cross-coupling reactions

Adams, Christopher John, Bedford, Robin B., Carter, Emma, Gower, Nicholas J., Haddow, Mairi F., Harvey, Jeremy N., Huwe, Michael, Cartes, M. Angeles, Mansell, Stephen M., Mendoza, Carla, Murphy, Damien Martin, Neeve, Emily C. and Nunn, Joshua 2012. Iron(I) in Negishi cross-coupling reactions. Journal of the American Chemical Society 134 (25) , pp. 10333-10336. 10.1021/ja303250t

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Herein we demonstrate both the importance of Fe(I) in Negishi cross-coupling reactions with arylzinc reagents and the isolation of catalytically competent Fe(I) intermediates. These complexes, [FeX(dpbz)2] [X = 4-tolyl (7), Cl (8a), Br (8b); dpbz = 1,2-bis(diphenylphosphino)benzene], were characterized by crystallography and tested for activity in representative reactions. The complexes are low-spin with no significant spin density on the ligands. While complex 8b shows performance consistent with an on-cycle intermediate, it seems that 7 is an off-cycle species.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: American Chemical Society
ISSN: 0002-7863
Funders: EPSRC
Last Modified: 10 Jul 2020 14:01

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