STEPHAN, Doug - University of Toronto - Department of Chemistry

研究领域

Our research interests span a wide range of inorganic main group and organometallic chemistry. In the more fundamental projects, new reactivity and chemical transformations are targeted with a view to developing new catalysts to either new materials or new processes. In addition, collaborations with industry address the design and development of new catalyst and process technologies for use in commercial applications.

近期论文

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M. Pérez, Z-W. Qu, C.B. Caputo, V. Podgorny, L.J. Hounjet, A. Hansen, S. Grimme, D.W. Stephan, Hydrosiliation of Ketones, Imines and Nitriles Catalyzed by Electrophillic Phosphonium Cations: Functional Group Selectivity and Mechanistic Considerations, Chem. Eur. J., accepted. R. Dobrovetsky, K. Takeuchia, D.W. Stephan, Metal-free Lewis Acid Mediated Dehydrocoupling of Phosphines and Concurrent Hydrogenation, Chem. Comm., accepted. D.W. Stephan, G. Erker, Frustrated Lewis Pair Chemistry: Development and Perspectives, Angew. Chem. Int. Ed., accepted. F. Dahcheh, D.W. Stephan, Bis-Mixed-Carbene Ruthenium-Thiolate-Alkylidene Complexes, Dalton Trans., 44 (4), 1724-1733. D.W. Stephan, Frustrated Lewis Pairs: From Concept to Catalysis, Acct. Chem. Res., DOI:10.1021/ar500375j. B. Bagh, A.M. McKinty, A.J. Lough, D.W. Stephan, 1,2,3-Triazolylidene Ruthenium(II)-Cyclometalated Complexes and Olefin Selective Hydrogenation Catalysis, Dalton Trans., DOI:10.1039/C4DT03156C Z. Zhang, R.M. Edkins, J. Nitsch, K. Fucke, A. Steffen, L.E. Longobardi, D.W. Stephan, C. Lambert, T.B. Marder, Optical and Electronic Properties of Organoboron Compounds with Strongly Electron-Accepting Bis(fluoromesityl)boryl Groups, Chem. Sci., 6 (1), 308-321, DOI:10.1039/C4SC02410A. F.A. Tsao, D.W. Stephan, 1,1-Carboboration to Tellurium-Boron Intramolecular Frustrated Lewis Pairs, Dalton Trans., 44 (1), 71-74, DOI:10.1039/C4DT03241A. F. Dahcheh, D.W. Stephan, G. Bertrand, Oxidative Addition at a Carbene Center: Synthesis of an Iminoboryl-CAAC Adduct, Chem. Eur. J., accepted. M.H. Holthausen, M. Colussi, D.W. Stephan, B(C6F5)3-Mediated Transformations and Hydrogenation of Carbodiimides, Chem. Eur. J., doi.org/10.1002/chem.201405014. T. Mahdi, D.W. Stephan, Enabling Catalytic Ketone Hydrogenation by Frustrated Lewis Pairs, J. Am. Chem. Soc., 136 (45), 15809-15812 L.E. Longobardi, V. Wolter, D.W. Stephan, Frustrated Lewis Pair Activation of N-Sulfinylamines: A Source of Sulfur Monoxide, Angew. Chem. Int. Ed., DOI:10.1002/anie.201409969 L.E. Longobardi, C. Tang, D.W. Stephan, Stoichiometric Reductions of Alkyl-Substituted Ketones and Aldehydes to Borinate Esters, Dalton Trans., 43 (42), 15723-15726, DOI:10.1039/C4DT02648A. R. Dobrovetsky, D.W. Stephan, tBu3P/ZnR2 (R = Et, I) Frustrated Lewis Pairs Catalyzed Functionalization and Reduction of CO2, Israel J. Chem., DOI:10.1002/ijch.201400121 F. Dahche, D. Martin, D.W. Stephan, G. Bertrand, A Room Temperature Stable Organoboron Isoelectronic with Singlet Carbenes, Angew. Chem. Int. Ed., DOI:10.1002/anie.201408371. B. Bagh, D.W. Stephan, Half Sandwich Ruthenium (II) Hydrides: Hydrogenation of Terminal, Internal, Cyclic and Functionalized Olefins, Dalton Trans., 43 (41), 15638-15645, DOI:10.1039/C4DT02407A. M.H. Holthausen, I. Mallov, D.W. Stephan, Phosphinimine-Substituted Boranes and Borenium Ions, Dalton Trans., 43 (40), 15201-15211, DOI:10.1039/C4DT02406K. L.E. Longobardi, C.A. Russell, M. Green, N.S. Townsend, K. Wang, A.J. Holmes, S.B. Duckett, J.E. McGrady, D.W. Stephan, Hydrogen Activation by an Aromatic Triphosphabenzene, J. Am. Chem. Soc., 136, 13453-13457, DOI:10.1021/ja5077525. M.M. Hansmann, F. Rominger, M.P. Boone, D.W. Stephan, A.S.K. Hashmi, Reactivity of Organogold Compounds with B(C6F5)3 - A Gold Boron Transmetalation via δ-B/π -Au Species, Organometallics, 33, 387-393. J.G.M. Morton, H. Al-Shammari, Y. Sun, J. Zhu, D.W. Stephan, 1,1-Olefin-Bridged bis(2-Indenyl) Metallocenes of Titanium and Zirconium, Dalton Trans., 43 (35), 13219-13231, DOI:10.1039/C4DT01583E. M.H. Holthausen, T. Mahdi, C. Schlepphorst, L.J. Hounjet, J.J. Weigand, D.W. Stephan, Frustrated Lewis Pair Mediated C-O or C-H Bond Activations of Esthers, Chem. Commun., 10038-10040, DOI:10.1039/C4CC01922A. O. Ekkert, C.B. Caputo, C. Prankevicius, C.G. Daniliuc, G. Kehr, H. Erker, D.W. Stephan, Reactivity of an Intramolecular Fluorophosphonium-Fluoroborate, Chem. Eur. J., 20, 11287-11290, DOI:10.1002/chem.201403110. M. Pérez, C.B. Caputo, D.W. Stephan, Olefin Transfer Hydrogenation via Electrophilic Phosphonium Catalysis of Heteroatom-Silane Dehydrocoupling, Proc. Nat. Acad. Sci., 111 (30), 10917-10921, doi/10.1079/pnas.1407484111. P. Jochmann, D.W. Stephan, The Synthesis and Structure of Zn(TEMPO)2 and [Zn(ŋ-H)(ŋ-TEMPO)]6, Chem. Commun., 8395-8397, DOI:10.1039/C4CC03256J. B. Bagh, A.M. McKinty, A.J. Lough, D.W. Stephan, Selective Intramolecular C-H Bond Activation of "Click" 1,2,3-Triazolylidene Ligands in Ruthenium(II) (ŋ6-arene) Complexes, Dalton Trans., 43 (34), 12842-12850, DOI:10.1039/c4dt01174k T. Wang, D.W. Stephan, Phosphine Catalyzed Reduction of CO2 with Boranes, Chem. Commun., 50, 7007-7010, DOI:10.1039/C4CC02103G. R.L. Melen, M.M. Hansmann, S.K. Hashmi, D.W. Stephan, Lewis Acid Promoted Cyclisation of Propargyl Esters: Structural Characterization of Dioxolium Compound, Chem. Comm., 50, 7243-7245, DOI:10.1039/C4CC01370K M.H. Holthausen, M. Mehta, D.W. Stephan, The Highly Lewis Acidic Dicationic Phosphonium Salt: [(SIMes)PFPh2][B(C6F5)4]2, Angew. Chem. Int. Ed., 53, 6538-6541, doi.org/10.1002/anie.201403693 and doi.org/10.1002/ange.201403693. P. Jochmann, D.W. Stephan, Zincocene and Dizincocene N-Heterocyclic Carbene Complexes and Catalytic Hydrogenation of Imines and Ketones, Chem.Eur. J., doi.org/10.1002/chem.20102875. D. Winkelhaus, D.W. Stephan, Boron "Distributed" Click Reactions Prompts C-H Activations, Angew. Chem. Int. Ed., 53, 5414-5417, doi.org/10.1002/anie.201402567 and doi.org/10.1002/ange.201402567. P.K. Dornan, L.E. Longobardi, D.W. Stephan, Reversible Frustrated Lewis Pair Addition of N-Heterocycles to Unsaturated C-C Bonds, Synlett, accepted C. Pranckevicius, D.W. Stephan, Ruthenium Complexes of Abnormally Bound, Anionic N-Heterocyclic Carbenes, Chem. Eur. J., 20, 6597-6602, doi.org/10.1002/chem.201402080 D.W. Stephan, G. Erker, Frustrated Lewis Pair Chemistry of Carbon, Nitrogen and Sulfur Oxides, Chem. Sci., 5, 2625-2641 F. Dahcheh, D.W. Stephan, Reactions of Ruthenium Hydrides and Ethyl-Vinyl Sulfides, Dalton Trans., 43, 3501-3507 DOI:10.1039/C3DT53326C. M.J. Sgro, F. Dahcheh, D.W. Stephan, Synthesis and Reactivity of Ruthenium-Hydride Complexes Containing a Tripodal Aminophosphine Ligand, Organometallics, 33, 578-586, DOI:10.1021/om4011388. L.J. Hounjet, D.W. Stephan, Hydrogenations by Frustrated Lewis Pairs: Main Group Alternatives to Transition Metal Catalysts, Organic Process Research & Development, 18, 384-391. D. Voicu, R. Choueiri, M. Abolhasani, G. Lestari, C. Seiler, G. Ménard, J. Greener, A. Guenther, D.W. Stephan, E. Kumacheva, Microfluidic Studies of Co2 Sequestration by Frustrated Lewis Pairs, J. Am. Chem. Soc., 2014, 136, 3875-3880, DOI:10.1021/ja411601a. M.P. Boone, D.W. Stephan, The Ru-ŋ6-Arene Cations [((Ph2PC6H4)2B(ŋ6-Ph))RuX]+ (X = Cl, H) as Lewis Acids, Chem. Eur. J., 20, 3333-3341, DOI:10.1002/chem.20130489 T.Wang, D.W. Stephan, Carbene-9-BBN Ring Expansions as a Route to Intramolecular Frustrated Lewis Pairs for CO2 Reduction, Chem. Eur. J., 20, 3036-3039, DOI:10.1002/chem.201304870. M.M. Hansmann, R.L. Melen, F. Rominger, A.S.K. Hashmi, D.W. Stephan, Boron Allylation Reagents Derived from Propargyl Esters, J. Am. Chem. Soc., 136, 777-782. M.P. Boone, D.W. Stephan, Ancillary Metal Centers in Frustrated Lewis Pair Chemistry: Ruthenium-Acetylide as a Lewis Base in the Activation of CO2, Aldehyde and Alkyne, Organometallics, 33, 387-393, DOI:10.1021/om401118n. A.M. McKinty, D.W. Stephan, A Facile Route to Ru-Alkylidenes, Dalton Trans., 43, 2710-2712, DOI:10.1039/C3DT53525H. J.A. Hatnean, J. Thompson, P.A. Chase, D.W. Stephan, Imine Hydrogenation by Alkylaluminum Catalysts, Chem. Commun., 50, 301-303, DOI:10.1039/C3CC47889K.