76
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King CR, Gustafson SJ, Black BR, Butler SK, Konnick MM, Periana RA, Hashiguchi BM, Ess DH. Arene C–H Functionalization by p-Block Metal Tl(III) Occurs at the Borderline of C–H Activation and Electron Transfer. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00475] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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77
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Fuller JT, Butler S, Devarajan D, Jacobs A, Hashiguchi BG, Konnick MM, Goddard WA, Gonzales J, Periana RA, Ess DH. Catalytic Mechanism and Efficiency of Methane Oxidation by Hg(II) in Sulfuric Acid and Comparison to Radical Initiated Conditions. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00226] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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78
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Gao H, Xu QL, Keene C, Yousufuddin M, Ess DH, Kürti L. Practical Organocatalytic Synthesis of Functionalized Non-C2-Symmetrical Atropisomeric Biaryls. Angew Chem Int Ed Engl 2016; 55:566-571. [PMID: 26592491 PMCID: PMC4824624 DOI: 10.1002/anie.201508419] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/20/2015] [Indexed: 11/09/2022]
Abstract
An organic acid catalyzed direct arylation of aromatic C(sp(2))-H bonds in phenols and naphthols for the preparation of 1,1'-linked functionalized biaryls was developed. The products are non-C2-symmetrical, atropoisomeric, and represent previously untapped chemical space. Overall this transformation is operationally simple, does not require an external oxidant, is readily scaled up (up to 98 mmol), and the structurally diverse 2,2'-dihydroxy biaryl (i.e., BINOL-type), as well as 2-amino-2'-hydroxy products (i.e., NOBIN-type) are formed with complete regioselectivity. Density-functional calculations suggest that the quinone and imino-quinone monoacetal coupling partners are exclusively arylated at their α-position by an asynchronous [3,3]-sigmatropic rearrangement of a mixed acetal species which is formed in situ under the reaction conditions.
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79
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Carlsen RW, Ess DH. Allylic amination reactivity of Ni, Pd, and Pt heterobimetallic and monometallic complexes. Dalton Trans 2016; 45:9835-40. [DOI: 10.1039/c6dt00256k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal heterobimetallic complexes with dative metal–metal interactions have the potential for novel fast reactivity.
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80
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Sheng M, Jiang N, Gustafson S, You B, Ess DH, Sun Y. A nickel complex with a biscarbene pincer-type ligand shows high electrocatalytic reduction of CO2 over H2O. Dalton Trans 2015; 44:16247-50. [PMID: 26329146 DOI: 10.1039/c5dt02916c] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a planar nickel complex coordinated with a pincer-type carbene-pyridine-carbene ligand which exhibits high selectivity for electrocatalytic CO2 reduction in the presence of H2O.
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81
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Gao H, Xu QL, Keene C, Yousufuddin M, Ess DH, Kürti L. Practical Organocatalytic Synthesis of Functionalized Non-C
2
-Symmetrical Atropisomeric Biaryls. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508419] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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82
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Gustafson SJ, Fuller JT, Devarajan D, Snyder J, Periana RA, Hashiguchi BG, Konnick MM, Ess DH. Contrasting Mechanisms and Reactivity of Tl(III), Hg(II), and Co(III) for Alkane C–H Functionalization. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00849] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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83
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Fuller JT, Harrison DJ, Leclerc MC, Baker RT, Ess DH, Hughes RP. A New Stepwise Mechanism for Formation of a Metallacyclobutane via a Singlet Diradical Intermediate. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00863] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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84
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Kelly CM, Kwon DH, Ferguson MJ, Bischof SM, Sydora OL, Ess DH, Stradiotto M, Turculet L. Synthesis and Reactivity of a Neutral, Three-Coordinate Platinum(II) Complex Featuring Terminal Amido Ligation. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506871] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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85
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Kelly CM, Kwon D, Ferguson MJ, Bischof SM, Sydora OL, Ess DH, Stradiotto M, Turculet L. Synthesis and Reactivity of a Neutral, Three‐Coordinate Platinum(II) Complex Featuring Terminal Amido Ligation. Angew Chem Int Ed Engl 2015; 54:14498-502. [DOI: 10.1002/anie.201506871] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 09/10/2015] [Indexed: 01/09/2023]
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86
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Brosnahan AM, Talbot A, McKeown BA, Kalman SE, Gunnoe TB, Ess DH, Sabat M. Phosphine and N-heterocyclic carbene ligands on Pt(II) shift selectivity from ethylene hydrophenylation toward benzene vinylation. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.03.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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87
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Walker WK, Kay BM, Michaelis SA, Anderson DL, Smith SJ, Ess DH, Michaelis DJ. Origin of Fast Catalysis in Allylic Amination Reactions Catalyzed by Pd–Ti Heterobimetallic Complexes. J Am Chem Soc 2015; 137:7371-8. [DOI: 10.1021/jacs.5b02428] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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88
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Zhang Y, Roberts SP, Bergman RG, Ess DH. Mechanism and Catalytic Impact of Ir–Ta Heterobimetallic and Ir–P Transition Metal/Main Group Interactions on Alkene Hydrogenation. ACS Catal 2015. [DOI: 10.1021/cs501884j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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89
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Talbot A, Devarajan D, Gustafson SJ, Fernández I, Bickelhaupt FM, Ess DH. Activation-Strain Analysis Reveals Unexpected Origin of Fast Reactivity in Heteroaromatic Azadiene Inverse-Electron-Demand Diels–Alder Cycloadditions. J Org Chem 2014; 80:548-58. [DOI: 10.1021/jo5025514] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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90
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Anderson P, Petit A, Ho J, Mitoraj MP, Coote ML, Danovich D, Shaik S, Braïda B, Ess DH. Protonated alcohols are examples of complete charge-shift bonds. J Org Chem 2014; 79:9998-10001. [PMID: 25317657 DOI: 10.1021/jo501549q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Accurate gas-phase and solution-phase valence bond calculations reveal that protonation of the hydroxyl group of aliphatic alcohols transforms the C-O bond from a principally covalent bond to a complete charge-shift bond with principally "no-bond" character. All bonding in this charge-shift bond is due to resonance between covalent and ionic structures, which is a different bonding mechanism from that of traditional covalent bonds. Until now, charge-shift bonds have been previously identified in inorganic compounds or in exotic organic compounds. This work showcases that charge-shift bonds can occur in common organic species.
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91
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Konnick MM, Hashiguchi BG, Devarajan D, Boaz NC, Gunnoe TB, Groves JT, Gunsalus N, Ess DH, Periana RA. Selective CH Functionalization of Methane, Ethane, and Propane by a Perfluoroarene Iodine(III) Complex. Angew Chem Int Ed Engl 2014; 53:10490-4. [DOI: 10.1002/anie.201406185] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Indexed: 11/10/2022]
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92
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Konnick MM, Hashiguchi BG, Devarajan D, Boaz NC, Gunnoe TB, Groves JT, Gunsalus N, Ess DH, Periana RA. Selective CH Functionalization of Methane, Ethane, and Propane by a Perfluoroarene Iodine(III) Complex. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406185] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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93
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Ma Z, Jiang J, Luo S, Cai Y, Cardon JM, Kay BM, Ess DH, Castle SL. Selective Access to E- and Z-ΔIle-Containing Peptides via a Stereospecific E2 Dehydration and an O → N Acyl Transfer. Org Lett 2014; 16:4044-7. [DOI: 10.1021/ol5018933] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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94
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Konnick MM, Bischof SM, Yousufuddin M, Hashiguchi BG, Ess DH, Periana RA. A Mechanistic Change Results in 100 Times Faster CH Functionalization for Ethane versus Methane by a Homogeneous Pt Catalyst. J Am Chem Soc 2014; 136:10085-94. [DOI: 10.1021/ja504368r] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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95
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Parent AA, Ess DH, Katzenellenbogen JA. π-π interaction energies as determinants of the photodimerization of mono-, di-, and triazastilbenes. J Org Chem 2014; 79:5448-62. [PMID: 24837276 PMCID: PMC4076016 DOI: 10.1021/jo500457n] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
![]()
We describe the quantitative [2 +
2] photocycloaddition of crystalline trans-2,4-dichloro-6-styrylpyrimidine
to produce the corresponding
htt r-ctt cyclobutane dimer, and we present 1H NMR analysis of the photolysis of this and six other mono-,
di-, and triazastilbenes in solid and solution states. Density functional
(M06-2X) and correlated ab initio (MP2) calculations were used to
obtain interaction energies between two monomers of each azastilbene.
These energies mirror the relative polarization of the stilbene moieties
and can be quantitatively correlated with the rate of reaction and
selective formation of the htt r-ctt dimers. In the
solid state, poor correlation is observed between interaction energy
and reactivity/selectivity. This lack of correlation is explained
through X-ray analysis of the azastilbene monomers and is shown to
be in accordance with the principles of Schmidt’s topochemical
postulate. Conversely, in solution there is a strong positive correlation
(R2 = 0.96) between interaction energies
and formation of the htt r-ctt dimer. These results
are the first to show this correlation and to demonstrate the utility
of calculated interaction energies as a tool for the prediction of
stereo- and regioselectivity in solution-state stilbene-type photocycloadditions.
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96
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Burgess SA, Devarajan D, Bolaño T, Ess DH, Gunnoe TB, Sabat M, Myers WH. 1,2-Addition of Dihydrogen across Rhodium(III)–OMe Bonds. Inorg Chem 2014; 53:5328-40. [DOI: 10.1021/ic500636m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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97
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Hashiguchi BG, Konnick MM, Bischof SM, Gustafson SJ, Devarajan D, Gunsalus N, Ess DH, Periana RA. Main-group compounds selectively oxidize mixtures of methane, ethane, and propane to alcohol esters. Science 2014; 343:1232-7. [PMID: 24626925 DOI: 10.1126/science.1249357] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Much of the recent research on homogeneous alkane oxidation has focused on the use of transition metal catalysts. Here, we report that the electrophilic main-group cations thallium(III) and lead(IV) stoichiometrically oxidize methane, ethane, and propane, separately or as a one-pot mixture, to corresponding alcohol esters in trifluoroacetic acid solvent. Esters of methanol, ethanol, ethylene glycol, isopropanol, and propylene glycol are obtained with greater than 95% selectivity in concentrations up to 1.48 molar within 3 hours at 180°C. Experiment and theory support a mechanism involving electrophilic carbon-hydrogen bond activation to generate metal alkyl intermediates. We posit that the comparatively high reactivity of these d(10) main-group cations relative to transition metals stems from facile alkane coordination at vacant sites, enabled by the overall lability of the ligand sphere and the absence of ligand field stabilization energies in systems with filled d-orbitals.
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98
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McCarthy SM, Lin YC, Devarajan D, Chang JW, Yennawar HP, Rioux RM, Ess DH, Radosevich AT. Intermolecular N–H Oxidative Addition of Ammonia, Alkylamines, and Arylamines to a Planar σ3-Phosphorus Compound via an Entropy-Controlled Electrophilic Mechanism. J Am Chem Soc 2014; 136:4640-50. [DOI: 10.1021/ja412469e] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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99
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Burford RJ, Piers WE, Ess DH, Parvez M. Reversible Interconversion Between a Monomeric Iridium Hydroxo and a Dinuclear Iridium μ-Oxo Complex. J Am Chem Soc 2014; 136:3256-63. [DOI: 10.1021/ja412650s] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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100
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Konnick MM, Bischof SM, Ess DH, Periana RA, Hashiguchi BG. Base accelerated generation of N2 and NH3 from an osmium nitride. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2013.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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