期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 134, 期 25, 页码 10333-10336出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja303250t
关键词
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资金
- EPSRC
- Pfizer
- CSIC
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.
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