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Affiliation(s)
- Radim Hrdina
- Institute of Organic Chemistry Justus-Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
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Cressy D, Zavala C, Abshire A, Sheffield W, Darko A. Tuning Rh(II)-catalysed cyclopropanation with tethered thioether ligands. Dalton Trans 2020; 49:15779-15787. [PMID: 33146649 DOI: 10.1039/d0dt03019h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Dirhodium(ii) paddlewheel complexes have high utility in diazo-mediated cyclopropanation reactions and ethyl diazoacetate is one of the most commonly used diazo compounds in this reaction. In this study, we report our efforts to use tethered thioether ligands to tune the reactivity of RhII-carbene mediated cyclopropanation of olefins with ethyl diazoacetate. Microwave methods enabled the synthesis of a family of RhII complexes in which tethered thioether moieties were coordinated to axial sites of the complex. Different tether lengths and thioether substituents were screened to optimise cyclopropane yields and minimise side product formation. Furthermore, good yields were obtained when equimolar diazo and olefin were used. Structural and spectroscopic investigation revealed that tethered thioethers changed the electronic structure of the rhodium core, which was instrumental in the performance of the catalysts. Computational modelling of the catalysts provided further support that the tethered thioethers were responsible for increased yields.
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Affiliation(s)
- Derek Cressy
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
| | - Cristian Zavala
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
| | - Anthony Abshire
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
| | - William Sheffield
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
| | - Ampofo Darko
- Department of Chemistry, University of Tennessee, Knoxville, TN 37796-1600, USA.
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Sunderland TL, Berry JF. Expanding the family of heterobimetallic Bi-Rh paddlewheel carboxylate complexes via equatorial carboxylate exchange. Dalton Trans 2016; 45:50-5. [PMID: 26599620 PMCID: PMC6779122 DOI: 10.1039/c5dt03740a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five novel homoleptic heterobimetallic bismuth(II)-rhodium(II) carboxylate complexes--BiRh(TPA)4 (1), BiRh(but)4 (2), BiRh(piv)4 (3), BiRh(esp)2 (4), and BiRh(OAc)4 (5)--were synthesized in good yields by equatorial ligand substitution starting from BiRh(TFA)4 (TPA = triphenylacetate, but = butyrate, piv = pivalate, esp = α,α,α',α'-tetramethyl-1,3-benzenedipropionate, OAc = acetate, and TFA = trifluoroacetate). We report here (1)H and (13)C{(1)H} NMR spectra and cyclic voltammograms for complexes , and IR spectra for all complexes. Irreversible redox waves appear between -1.4 to -1.5 V for [BiRh](3+/4+) couples and 1.3 to 1.5 V vs. Fc/Fc(+) for [BiRh](4+/5+) couples for complexes indicating a wide range of stability for the compounds. The X-ray crystal structure of reveals a Bi-Rh distance of 2.53 Å.
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Affiliation(s)
- Travis L Sunderland
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA.
| | - John F Berry
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA.
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Dunham SU, Remaley TS, Moore BS, Evans DL, Dunham SU. Isolation, Characterization, and DNA Binding Kinetics of Three Dirhodium(II,II) Carboxyamidate Complexes: Rh2(μ-L)(HNOCCF3)3 where L= [OOCCH3]−, [OOCCF3]−, or [HNOCCF3]−. Inorg Chem 2011; 50:3458-63. [DOI: 10.1021/ic1023532] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shari U Dunham
- Department of Chemistry, Moravian College, 1200 Main Street, Bethlehem, Pennsylvania 18018, USA.
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Doyle MP, Duffy R, Ratnikov M, Zhou L. Catalytic Carbene Insertion into C−H Bonds. Chem Rev 2009; 110:704-24. [DOI: 10.1021/cr900239n] [Citation(s) in RCA: 1392] [Impact Index Per Article: 92.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael P. Doyle
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Richard Duffy
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Maxim Ratnikov
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
| | - Lei Zhou
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742
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Nichols JM, Liu Y, Zavalij P, Isaacs L, Doyle MP. Diphenylglycoluril as a novel ligand architecture for dirhodium(II) carboxamidates. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.12.001] [Citation(s) in RCA: 9] [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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Schäffler L, Buck S, Maas G. 6-Halogenopyridin-2-olato complexes with the diruthenium(2+) core: Equilibria between head-to-head and head-to-tail structures. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.06.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Doyle MP, Ren T. The Influence of Ligands on Dirhodium(II) on Reactivity and Selectivity in Metal Carbene Reactions. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/9780470166512.ch2] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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Welch C, Tu Q, Wang T, Raab C, Wang P, Jia X, Bu X, Bykowski D, Hohenstaufen B, Doyle M. Observations of Rhodium-Containing Reaction Intermediates using HPLC with ICP-MS and ESI-MS Detection. Adv Synth Catal 2006. [DOI: 10.1002/adsc.200505438] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tu Q, Wang T, Welch CJ, Wang P, Jia X, Raab C, Bu X, Bykowski D, Hohenstaufen B, Doyle MP. Identification and Characterization of Isomeric Intermediates in a Catalyst Formation Reaction by Means of Speciation Analysis Using HPLC−ICPMS and HPLC−ESI-MS. Anal Chem 2006; 78:1282-9. [PMID: 16478123 DOI: 10.1021/ac051679y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Information on chemical speciation is much needed in mechanistic and kinetic studies on catalyst formation processes in pharmaceutical research. Speciation analysis was applied to the identification and quantification of various rhodium species involved in a ligand exchange process leading to formation of catalyst dirhodium(II) tetrakis[methyl 2-oxopyrrolidin-5(S)-carboxylate]. Inductively coupled plasma mass spectrometry (ICPMS) was used as an element-specific detector following species separation by reversed-phase high-performance liquid chromatography (RP-HPLC), and electrospray ionization mass spectrometry (ESI-MS) was used for species identification and confirmation. A novel interface between the HPLC and ICPMS, which consisted of an eluent splitter, a desolvation unit, and the ICPMS built-in peristaltic pump, enabled the use of RP-HPLC with gradient elution and up to 100% organic components in the LC eluent without organic loading in the plasma. A variety of reaction intermediates were identified and quantified along the pathway to formation of the desired product, including isomeric di-, tri-, and tetrasubstituted species previously believed to be absent. This has provided new insights into the mechanism and kinetics of the reaction. The combination of HPLC-ICPMS and HPLC-ESI-MS has proven to be a valuable tool for the investigation of species evolution in catalyst formation process.
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Affiliation(s)
- Qiang Tu
- Merck Research Laboratories, Merck & Co., Inc., P.O. Box 2000, Rahway, NJ 07065, USA.
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Doyle MP, Colyer JT. Synthesis of dirhodium(II) tetrakis[methyl 1-(3-phenylpropanoyl)-2-oxaimidazolidine-4(S)-carboxylate], Rh2(4S-MPPIM)4. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/j.tetasy.2003.08.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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cis-Enhanced cyclopropanation catalysts: reaction chemistry of three isomers of Rh2[N(C6H5)COCH3]4. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00222-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Doyle MP, Timmons DJ, Tumonis JS, Gau HM, Blossey EC. Preparation and Catalytic Properties of Immobilized Chiral Dirhodium(II) Carboxamidates. Organometallics 2002. [DOI: 10.1021/om011082i] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael P. Doyle
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721, and Department of Chemistry, Rollins College, Winter Park, Florida 32789
| | - Daren J. Timmons
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721, and Department of Chemistry, Rollins College, Winter Park, Florida 32789
| | - Jennifer S. Tumonis
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721, and Department of Chemistry, Rollins College, Winter Park, Florida 32789
| | - Han-Mou Gau
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721, and Department of Chemistry, Rollins College, Winter Park, Florida 32789
| | - Erich C. Blossey
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721, and Department of Chemistry, Rollins College, Winter Park, Florida 32789
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Barberis M, Estevan F, Lahuerta P, Pérez-Prieto J, Sanaú M. New dinuclear catalysts Rh(2)(N-O)(2)[(C6H4)P(C6H5)2]2 with imidate ligands: synthesis and isomerization from head-to-tail to head-to-head configuration of the imidate ligands. Inorg Chem 2001; 40:4226-9. [PMID: 11487326 DOI: 10.1021/ic010257d] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two new dirhodium(II) catalysts of general formula Rh(2)(N-O)(2)[(C(6)H(4))P(C(6)H(5))(2)](2) (N-O = C(4)H(4)NO(2)) are prepared, starting from Rh(2)(O(2)CCH(3))(2)(PC)(2)L(2) [PC = (C(6)H(4))P(C(6)H(5))(2) (head-to-tail arrangement); L = HO(2)CCH(3)]. The thermal reaction of Rh(2)(O(2)CCH(3))(2)(PC)(2).L(2) with the neutral succinimide stereoselectively gives one compound that according to the X-ray structure determination has the formula Rh(2)(C(4)H(4)NO(2))(2)[(C(6)H(4))P(C(6)H(5))(2)](2) (1). It corresponds to the polar isomer with two bridging imidate ligands in a head-to-head configuration. However, stepwise reaction of Rh(2)(O(2)CCH(3))(2)(PC)(2).L(2) with (CH(3))(3)SiCl and potassium succinimidate yields a mixture of 1 and one of the two possible isomers (structure B) with a head-to-tail configuration of the imidate ligands, Rh(2)(C(4)H(4)NO(2))(2)[(C(6)H(4))P(C(6)H(5))(2)](2) (2), also characterized by X-ray methods. In solution, compound 2 undergoes slow isomerization to 1; the rate of this process is enhanced by the presence of acetonitrile. Compounds 1 and 2 are obtained as pure enantiomers starting from (M)- and (P)-Rh(2)(O(2)CCH(3))(2)(PC)(2).L(2) rather than from the racemic mixture. Their enantioselectivities in cyclopropanation of 1-diazo-5-penten-2-one are similar to those reported for the dirhodium amidate catalysts.
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Affiliation(s)
- M Barberis
- Departamento de Química Inorgánica, Facultat de Química, Universitat de Valencia, Dr. Moliner, 50, 46100 Burjassot-Valencia, Spain
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Eagle CT, Farrar DG, Holder GN, Pennington WT, Bailey RD. Structural and electronic properties of (2,2-trans)-dirhodium(II) tetrakis(N-phenylacetamidate). J Organomet Chem 2000. [DOI: 10.1016/s0022-328x(99)00556-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Müller P, Imogaı̈ H. Rh(II)-catalyzed asymmetric cyclopropenation of propargyl derivatives; synthesis of cyclopropene- and cis-cyclopropane-amino acids. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0957-4166(98)00469-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Doyle MP, Forbes DC. Recent Advances in Asymmetric Catalytic Metal Carbene Transformations. Chem Rev 1998; 98:911-936. [PMID: 11848918 DOI: 10.1021/cr940066a] [Citation(s) in RCA: 1071] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael P. Doyle
- Department of Chemistry, University of Arizona, Tucson, Arizona 85721
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