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Current literature
Andrey Kuzovlev
02.03.2017
Iron Catalysis in Organic Synthesis
Multitasking Champion
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Readily available, cheap, relatively nontoxic, 1.300 ppm residual iron is
acceptable in drug substances. It is < 10 ppm for other metals.
Located in center of the d-block, just above Ru, iron is hence “early” and
“late” transition metal in the same time.
Iron spans formal oxidation states ranging from – II to + VI.
Lewis acidity varies from fairly modest to very high.
Iron cations binds well to many N- or O-based ligands, N-heterocyclic
carbenes.
Iron-dependent enzymes are vital for all forms of life.
2
Introduction
Alois Furstner ACS Cent. Sci.2016, 2, 778 – 789.
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Heterogenic iron catalysis:
Heber-Bosch process (Fe3O4)
Fischer-Tropsch process (Fe)
Conversion of methane to ethylene, aromatics and hydrogen
Homogeneous catalysis:
Reduction of imines and aldehydes
Oxidation with peroxides
Coupling reactions
Cycloaddition
Aldol reaction
Radical reactions
O-H bond insertion
Hydrofluorination
Hydromethylation
3
Catalytic abilities
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Weak and strong ligands (d6). Fe2+
Geoffrey A. Lawrance Introduction to Coordination Chemistry; John Wiley and Sons Ltd: Chichester, 2010.
I− < Br− < S2− < SCN− < Cl− < NO3− < N3
− < F− < OH− < C2O42− < H2O < NCS− <
CH3CN < py < NH3 < en < 2,2'-bipyridine < phen < NO2− < PPh3 < CN− < CO
Δ < P → high spin
Δ > P → low spin
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Metal/Ligand Cooperativity. “Non-innocent” Ligands
Alois Furstner ACS Cent. Sci.2016, 2, 778 – 789.
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Intermolecular [2+2] cycloaddition
J. M. Hoyt, V. A. Schmidt, A. M. Tondreau, P. J. Chirik Science 2015, 349, 960 – 963.
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Iron-catalyzed Formation of 2-Aminopyridines
L2
T. K. Lane, B. R. D’Souza, J. Louie J. Org. Chem. 2012, 77, 7555 – 7563.
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Iron-catalyzed Formation of 2-Aminopyridines
T. K. Lane, B. R. D’Souza, J. Louie J. Org. Chem. 2012, 77, 7555 – 7563.
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Iron-catalyzed 1,4-Functionalization of 1,3-Dienes
E. McNeill, T. Ritter Acc. Chem. Res. 2015, 48, 2330 – 2343.
Fe Rh and Pd
Linear Branched
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Iron-catalyzed 1,4-Hydrovinylation of 1,3-Dienes
E. McNeill, T. Ritter Acc. Chem. Res. 2015, 48, 2330 – 2343.
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Iron-catalyzed 1,4-Hydroboration of 1,3-Dienes
E. McNeill, T. Ritter Acc. Chem. Res. 2015, 48, 2330 – 2343.
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12 R. Langer, G. Leitus, Y. Ben-David, D. Milstein Angew. Chem. Int. Ed. 2011, 50, 2120 – 2124.
Carbonyl reduction. Pincer complexes
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Carbonyl reduction. Pincer complexes
Alois Furstner ACS Cent. Sci.2016, 2, 778 – 789.
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14 C. P. Casey, H. Guan J. Am. Chem. Soc. 2007, 129, 5816 – 5817.
Carbonyl Reduction. Knolker’s Catalyst
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Carbonyl Reduction. Knolker’s Catalyst
A. Quintard, J. Rodriguez Ang. Chem. Int. Ed. 2014, 53, 4044 – 4055.
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16 S. Zhou, S. Fleischer, K. Junge, M. Beller Angew. Chem. Int. Ed. 2011, 50, 5120 – 5124.
Enantioselective Hydrogenation of Imines
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Amine(imine)diphosphine Iron Catalysts
W. Zuo, A. J. Lough, Y. F. Li, R. H. Morris Science 2013, 342, 1080 – 1083.
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Amine(imine)diphosphine Iron Catalysts
W. Zuo, A. J. Lough, Y. F. Li, R. H. Morris Science 2013, 342, 1080 – 1083.
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Nobel Metal Reactivity and Selectivity
Hydrosilylation of Ketones
T. Bleith, H. Wadepohl, L. H. Gade J. Am. Chem. Soc. 2015, 137, 2456 – 2459.
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Nobel Metal Reactivity and Selectivity
Hydrosilylation of Ketones
T. Bleith, H. Wadepohl, L. H. Gade J. Am. Chem. Soc. 2015, 137, 2456 – 2459.
T. Vergote et al. Organometallics 2014, 33, 1953 – 1963.
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Metal/Metal Cooperativity
T. J. Mazzacano, N. P. Mankad J. Am. Chem. Soc. 2013, 135, 17258 – 17261.
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Metal/Metal Cooperativity
Alois Furstner ACS Cent. Sci.2016, 2, 778 – 789.
Alois Furstner et al. J. Am. Chem. Soc. 2008, 130, 1992 – 2004.
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Asymetric Aqueous Mukaiyama Aldol Addition
J. Jankowska, J. Paradowska, B. Rakiel, J. Mlinarski J. Org. Chem. 2007, 72, 2228-2231.
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O-H bond insertion
Zhu, S.-F.; Cai, Y.; Mao, H.-X.; Xie, J.-H.; Zhou, Q.-L. Nat. Chem. 2010, 2, 546-551.
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Three-Coordinate Iron Complexes
P. L. Holland Acc. Chem. Res. 2008, 41, 905-914.
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C-H Functionalization
Paul E. Gormisky and M. Christina White J. Am. Chem. Soc. 2013, 135, 14052 – 14055.
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Cross-Coupling reactions
A. Furstner, A. Leitner, M. Mendez, H. Krause J. Am. Chem. Soc. 2002, 124, 13856 – 13863.
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Cross-Coupling reactions
A. Furstner, A. Leitner, M. Mendez, H. Krause J. Am. Chem. Soc. 2002, 124, 13856 – 13863.
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29 S. B. Munoz III, S.L. Daifuku, W. W. Brennesel, M. L. Neidig J. Am. Chem. Soc. 2016, 138, 7492 – 7495.
Cross-Coupling reactions
[MgCl(THF)5][Fe8Me12]
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Iron-Catalyzed Enantioselective Cross-Coupling
M. Jin, L. Adak, M. Nakamura J. Am. Chem. Soc. 2015, 137, 7128 – 7134.
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Iron-Catalyzed Enantioselective Cross-Coupling
M. Jin, L. Adak, M. Nakamura J. Am. Chem. Soc. 2015, 137, 7128 – 7134.
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Redox-Active Esters in Fe-catalyzed C-C Coupling
Phil S. Baran and co-workers J. Am. Chem. Soc. 2016, 138, 11132 – 11135.
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Redox-Active Esters in Fe-catalyzed C-C Coupling
Phil S. Baran and co-workers J. Am. Chem. Soc. 2016, 138, 11132 – 11135.
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34 Phil S. Baran and co-workers J. Am. Chem. Soc. 2017, DOI: 10.1021/jacs.6b13155.
C-C Bond Construction from Olefins via Radicals
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35 Phil S. Baran and co-workers J. Am. Chem. Soc. 2017, DOI: 10.1021/jacs.6b13155.
C-C Bond Construction from Olefins via Radicals
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Baran’s method in Minisci-type reactions (Specially for Sam)
Phil S. Baran and co-workers J. Am. Chem. Soc. 2017, DOI: 10.1021/jacs.6b13155.
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Hydromethylation of Unactivated Olefins (Specially for Camilo)
Phil S. Baran and co-workers J. Am. Chem. Soc. 2015, 137, 8046-8049.
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Free Radical Hydrofluorination (Specially for Daniel)
T. J. Barker, D. L. Boger J. Am. Chem. Soc. 2012, 134, 13588-13591.
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Role of Spin State
Alois Furstner ACS Cent. Sci.2016, 2, 778 – 789.
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Impurities in Iron Metal as the Actual Catalyst?
10 ppm of Cu2O is enough for
Sufficient catalysis
S.L. Buchwald, C. Bolm Angew. Chem. Int. Ed. 2009, 548, 5586– 5587.
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Impurities in Iron Metal as the Actual Catalyst?
R. B. Bedford, S. L. Welch Chem. Commun. 2001, 129– 130.
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Thank you for your attention!
Iron – Multitasking Champion