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Karimi B, Jafari E, Mansouri F, Tavakolian M. Catalytic asymmetric Friedel-Crafts alkylation of unprotected indoles with nitroalkenes using a novel chiral Yb(OTf) 3-pybox complex. Sci Rep 2023; 13:14736. [PMID: 37679477 PMCID: PMC10484919 DOI: 10.1038/s41598-023-41921-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 09/04/2023] [Indexed: 09/09/2023] Open
Abstract
Chiral chloro-indeno pybox has served as a new ligand for the Yb(OTf)3-catalyzed asymmetric Friedel-Crafts alkylation reaction of indoles with nitroalkenes. The tunable nature of pybox ligands enables the rational design of catalysts for optimal performance in terms of both activity and stereoselectivity in a Friedel-Crafts-type reaction. Good to excellent yields and enantioselectivities were obtained for a relatively wide range of substrates, including sterically hindered compounds, under optimized reaction conditions.
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Affiliation(s)
- Babak Karimi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO-Box 45195-1159, Zanjan, 45137-66731, Iran.
- Research Center for Basic Sciences & Modern Technologies (RBST), Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, Zanjan, 45137-66731, Iran.
| | - Ehsan Jafari
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO-Box 45195-1159, Zanjan, 45137-66731, Iran
| | - Fariborz Mansouri
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO-Box 45195-1159, Zanjan, 45137-66731, Iran
| | - Mina Tavakolian
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, PO-Box 45195-1159, Zanjan, 45137-66731, Iran
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2
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Wegener AR, Ghosh SK, Bhuvanesh N, Reibenspies J, Gladysz JA. Rhodium(III) Werner Complexes with 1,2‐Diphenylethylenediamine Ligands: Syntheses, Structures, and Applications as Chiral Hydrogen Bond Donor Catalysts and Agents for Enantiomer Purity Determinations. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Aaron R Wegener
- Texas A&M University Chemistry P.O. Box 30012 77843 College Station UNITED STATES
| | - Subrata K. Ghosh
- Texas A&M University Chemistry P.O. Box 30012 77843 College Station UNITED STATES
| | - Nattamai Bhuvanesh
- Texas A&M University Chemistry P.O. Box 30012 77843 College Station UNITED STATES
| | - Joseph Reibenspies
- Texas A&M University Chemistry P.O. Box 30012 77843 College Station UNITED STATES
| | - John A. Gladysz
- Texas A&M University Department of Chemistry PO Box 30012 77842-3012 College Station UNITED STATES
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3
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Larionov VA, Feringa BL, Belokon YN. Enantioselective "organocatalysis in disguise" by the ligand sphere of chiral metal-templated complexes. Chem Soc Rev 2021; 50:9715-9740. [PMID: 34259242 DOI: 10.1039/d0cs00806k] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Asymmetric catalysis holds a prominent position among the important developments in chemistry during the 20th century. This was acknowledged by the 2001 Nobel Prize in chemistry awarded to Knowles, Noyori, and Sharpless for their development of chiral metal catalysts for organic transformations. The key feature of the catalysts was the crucial role of the chiral ligand and the nature of the metal ions, which promoted the catalytic conversions of the substrates via direct coordination. Subsequently the development of asymmetric organic catalysis opened new avenues to the synthesis of enantiopure compounds, avoiding any use of metal ions. Recently, an alternative approach to asymmetric catalysis emerged that relied on the catalytic functions of the ligands themselves boosted by coordination to metal ions. In other words, in these hybrid chiral catalysts the substrates are activated not by the metal ions but by the ligands. The activation and enantioselective control occurred via well-orchestrated and custom-tailored non-covalent interactions of the substrates with the ligand sphere of chiral metal complexes. In these metal-templated catalysts, the metal served either as a template (a purely structural role), or it constituted the exclusive source of chirality (metal-centred chirality due to the spatial arrangement of achiral or chiral bi-/tridentate ligands around an octahedral metal centre), and/or it increased the Brønsted acidity of the ligands. Although the field is still in its infancy, it represents an inspiring combination of both metal and organic catalysis and holds major unexplored potential to push the frontiers of asymmetric catalysis. Here we present an overview of this emerging field discussing the principles, applications and perspectives on the catalytic use of chiral metal complexes that operate as "organocatalysts in disguise". It has been demonstrated that these chiral metal complexes are efficient and provide high stereoselective control in asymmetric hydrogen bonding catalysis, phase-transfer catalysis, Brønsted acid/base catalysis, enamine catalysis, nucleophilic catalysis, and photocatalysis as well as bifunctional catalysis. Also, many of the catalysts have been identified as highly effective catalysts at remarkably low catalyst loadings. These hybrid systems offer many opportunities in the synthesis of chiral compounds and represent promising alternatives to metal-based and organocatalytic asymmetric transformations.
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Affiliation(s)
- Vladimir A Larionov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russian Federation.
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Parker A, Lamata P, Viguri F, Rodríguez R, López JA, Lahoz FJ, García-Orduña P, Carmona D. Half-sandwich complexes of osmium containing guanidine-derived ligands. Dalton Trans 2020; 49:13601-13617. [PMID: 32975256 DOI: 10.1039/d0dt02713h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Pyridinyl- and phosphano-guanidino complexes of formula [(η6-p-cymene)OsCl(H2L)][SbF6] (cymene = MeC6H4iPr; H2L = N,N'-bis(p-Tolyl)-N''-(2-pyridinylmethyl)guanidine, H2L1 (1) and N,N'-bis(p-Tolyl)-N''-(2-diphenylphosphanoethyl)guanidine, H2L2 (2)) have been prepared from the dimer [{(η6-p-cymene)OsCl}2(μ-Cl)2] and H2L in the presence of NaSbF6. Treatment of complex 2 with HCl renders the phosphano-guanidinium complex [(η6-p-cymene)OsCl2(H3L2)][SbF6] (3). Compounds 1 and 2 react with AgSbF6 rendering the cationic aqua complexes [(η6-p-cymene)Os(H2L)(OH2)][SbF6]2 (H2L = H2L1 (4), H2L2 (5)). Addition of monodentate ligands L to compound 4 affords complexes of formula [(η6-p-cymene)Os(H2L1)L][SbF6]2 (L = py (6), 4-(NHMe)py (7), CO (8), P(OMe)3 (9)). Treatment of complexes 4 and 5 with NaHCO3 renders the monocationic complexes [(η6-p-cymene)Os(κ3N,N',N''-HL1)][SbF6] (10) and [(η6-p-cymene)Os(κ3N,N',P-HL2)][SbF6] (11), respectively, in which the HL ligand adopts a fac-κ3 coordination mode. The new complexes have been characterised by analytical and spectroscopic means, including the determination of the crystal structures of the compounds 1-4, 6, 8, and 11, by X-ray diffractometric methods. The phosphano-guanidino complexes 2 and 5 exhibit a temperature dependent fluxional process in solution. The new 18 electron complexes 1, 2, 6, and 8-10 are active catalysts for the Friedel-Crafts reaction between trans-β-nitrostyrene and N-methyl-2-methylindole. Conversions greater than 90% were obtained. Proton NMR studies support a mechanism involving the Brønsted-acid activation of trans-β-nitrostyrene through the NH functionalities of the coordinated guanidine ligands.
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Affiliation(s)
- Amie Parker
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
| | - Pilar Lamata
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
| | - Fernando Viguri
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
| | - Ricardo Rodríguez
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
| | - José A López
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
| | - Fernando J Lahoz
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
| | - Pilar García-Orduña
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
| | - Daniel Carmona
- Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), CSIC - Universidad de Zaragoza, Departamento de Química Inorgánica, Pedro Cerbuna 12, 50009 Zaragoza, Spain.
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5
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Nährig F, Gemmecker G, Chung JY, Hütchen P, Lauk S, Klein MP, Sun Y, Niedner-Schatteburg G, Sitzmann H, Thiel WR. Complexes of Platinum Group Elements Containing the Intrinsically Chiral Cyclopentadienide Ligand (CpC)−1. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00138] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Florian Nährig
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Gerd Gemmecker
- Technische Universität München, BNMRZ, Fakultät für Chemie, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Jae-Yeon Chung
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Patrick Hütchen
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Sergej Lauk
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Matthias P. Klein
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Yu Sun
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
- Research Center OPTIMAS, Erwin-Schrödinger Str. 46, 67663 Kaiserslautern, Germany
| | - Helmut Sitzmann
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
| | - Werner R. Thiel
- Technische Universität Kaiserslautern, Fachbereich Chemie, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany
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6
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Mukherjee T, Ghosh SK, Wititsuwannakul T, Bhuvanesh N, Gladysz JA. Chiral-at-Metal Ruthenium Complexes with Guanidinobenzimidazole and Pentaphenylcyclopentadienyl Ligands: Synthesis, Resolution, and Preliminary Screening as Enantioselective Second Coordination Sphere Hydrogen Bond Donor Catalysts. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00073] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tathagata Mukherjee
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
| | - Subrata K. Ghosh
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
| | - Taveechai Wititsuwannakul
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
| | - John A. Gladysz
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77843-3012, United States
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7
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Gimeno MC, Herrera RP. Hydrogen Bonding and Internal or External Lewis or Brønsted Acid Assisted (Thio)urea Catalysts. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901344] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- M. Concepción Gimeno
- Departamento de Química Inorgánica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) CSIC-Universidad de Zaragoza; C/ Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Raquel P. Herrera
- Departamento de Química Orgánica. Laboratorio de Organocatálisis Asimétrica; Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) CSIC-Universidad de Zaragoza; C/ Pedro Cerbuna 12 50009 Zaragoza Spain
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8
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Biancalana L, Ciancaleoni G, Zacchini S, Monti A, Marchetti F, Pampaloni G. Solvent-Dependent Hemilability of (2-Diphenylphosphino)Phenol in a Ru(II) para-Cymene System. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00071] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lorenzo Biancalana
- Università di Pisa, Dipartimento di Chimica e Chimica Industriale, Via Moruzzi 13, I-56124 Pisa, Italy
- CIRCC, via Celso Ulpiani 27, I-70126 Bari, Italy
| | - Gianluca Ciancaleoni
- Università di Pisa, Dipartimento di Chimica e Chimica Industriale, Via Moruzzi 13, I-56124 Pisa, Italy
- CIRCC, via Celso Ulpiani 27, I-70126 Bari, Italy
| | - Stefano Zacchini
- CIRCC, via Celso Ulpiani 27, I-70126 Bari, Italy
- Università di Bologna, Dipartimento di Chimica Industriale “Toso Montanari”, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Andrea Monti
- Università di Pisa, Dipartimento di Chimica e Chimica Industriale, Via Moruzzi 13, I-56124 Pisa, Italy
| | - Fabio Marchetti
- Università di Pisa, Dipartimento di Chimica e Chimica Industriale, Via Moruzzi 13, I-56124 Pisa, Italy
- CIRCC, via Celso Ulpiani 27, I-70126 Bari, Italy
| | - Guido Pampaloni
- Università di Pisa, Dipartimento di Chimica e Chimica Industriale, Via Moruzzi 13, I-56124 Pisa, Italy
- CIRCC, via Celso Ulpiani 27, I-70126 Bari, Italy
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9
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Cationic ruthenium complex of the formula [RuCl(2,6-diacetylpyridine)(PPh3)2]BArF and its catalytic activity in the formation of enol esters. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Tawde TS, Wagh SJ, Sapre JV, Khose VN, Badani PM, Karnik AV. Reversal of enantioselectivity induced by the achiral part of an organocatalyst in a Diels–Alder reaction. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Díaz-Álvarez AE, Vidal C, Suárez FJ, Díez J, Cadierno V, Crochet P. C–H versus O–H Bond Activation in Phosphino-alcohol Ligands: Synthesis of the α-Hydroxy-alkyl Ruthenium(II) Derivatives [RuCl{κ2(P,C)-Ph2PC6H4C(R)OH}(η6-arene)]. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alba E. Díaz-Álvarez
- Laboratorio
de Compuestos
Organometálicos y Catálisis (Unidad Asociada al CSIC),
Centro de Innovación en Química Avanzada (ORFEO−CINQA),
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería 8, E-33006 Oviedo, Spain
| | - Cristian Vidal
- Laboratorio
de Compuestos
Organometálicos y Catálisis (Unidad Asociada al CSIC),
Centro de Innovación en Química Avanzada (ORFEO−CINQA),
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería 8, E-33006 Oviedo, Spain
| | - Francisco J. Suárez
- Laboratorio
de Compuestos
Organometálicos y Catálisis (Unidad Asociada al CSIC),
Centro de Innovación en Química Avanzada (ORFEO−CINQA),
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería 8, E-33006 Oviedo, Spain
| | - Josefina Díez
- Laboratorio
de Compuestos
Organometálicos y Catálisis (Unidad Asociada al CSIC),
Centro de Innovación en Química Avanzada (ORFEO−CINQA),
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería 8, E-33006 Oviedo, Spain
| | - Victorio Cadierno
- Laboratorio
de Compuestos
Organometálicos y Catálisis (Unidad Asociada al CSIC),
Centro de Innovación en Química Avanzada (ORFEO−CINQA),
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería 8, E-33006 Oviedo, Spain
| | - Pascale Crochet
- Laboratorio
de Compuestos
Organometálicos y Catálisis (Unidad Asociada al CSIC),
Centro de Innovación en Química Avanzada (ORFEO−CINQA),
Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, C/Julián Clavería 8, E-33006 Oviedo, Spain
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12
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Lewis KG, Ghosh S, Bhuvanesh N, Gladysz JA. Cobalt(III) Werner Complexes with 1,2-Diphenylethylenediamine Ligands: Readily Available, Inexpensive, and Modular Chiral Hydrogen Bond Donor Catalysts for Enantioselective Organic Synthesis. ACS CENTRAL SCIENCE 2015; 1:50-56. [PMID: 27162946 PMCID: PMC4827665 DOI: 10.1021/acscentsci.5b00035] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Indexed: 06/05/2023]
Abstract
In the quest for new catalysts that can deliver single enantiomer pharmaceuticals and agricultural chemicals, chemists have extensively mined the "chiral pool", with little in the way of inexpensive, readily available building blocks now remaining. It is found that Werner complexes based upon the D3 symmetric chiral trication [Co(en)3](3+) (en = 1,2-ethylenediamine), which features an earth abundant metal and cheap ligand type, and was among the first inorganic compounds resolved into enantiomers 103 years ago, catalyze a valuable carbon-carbon bond forming reaction, the Michael addition of malonate esters to nitroalkenes, in high enantioselectivities and without requiring inert atmosphere conditions. The title catalysts, [Co((S,S)-dpen)3](3+) ((S,S)-3 (3+)) 3X(-), employ a commercially available chiral ligand, (S,S)-1,2-diphenylethylenediamine. The rates and ee values are functions of the configuration of the cobalt center (Λ/Δ) and the counteranions, which must be lipophilic to solubilize the trication in nonaqueous media. The highest enantioselectivities are obtained with Λ and 2Cl(-)BArf (-), 2BF4 (-)BArf (-), or 3BF4 (-) salts (BArf (-) = B(3,5-C6H3(CF3)2)4 (-)). The substrates are not activated by metal coordination, but rather by second coordination sphere hydrogen bonding involving the ligating NH2 groups. Crystal structures and NMR data indicate enthalpically stronger interactions with the NH moieties related by the C3 symmetry axis, as opposed to those related by the C2 symmetry axes; rate trends and other observations suggest this to be the catalytically active site. Both Λ- and Δ-(S,S)-3 (3+) 2Cl(-)BArf (-) are effective catalysts for additions of β-ketoesters to RO2CN=NCO2R species (99-86% yields, 81-76% ee), which provide carbon-nitrogen bonds and valuable precursors to α-amino acids.
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13
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Pardo P, Carmona D, Lamata P, Rodrı́guez R, Lahoz FJ, Garcı́a-Orduña P, Oro LA. Reactivity of the Chiral Metallic Brønsted Acid [(η6-p-MeC6H4iPr)Ru(κ3P,O,O′-POH)][SbF6]2 (POH = (SC1,RC2)-Ph2PC(Ph)HC(OH)HCH2OMe) toward Aldimines. Organometallics 2014. [DOI: 10.1021/om501018r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Pilar Pardo
- Departamento de Quı́mica
Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Daniel Carmona
- Departamento de Quı́mica
Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Pilar Lamata
- Departamento de Quı́mica
Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Ricardo Rodrı́guez
- Departamento de Quı́mica
Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Fernando J. Lahoz
- Departamento de Quı́mica
Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Pilar Garcı́a-Orduña
- Departamento de Quı́mica
Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Luis A. Oro
- Departamento de Quı́mica
Inorgánica, Instituto de Sı́ntesis Quı́mica y Catálisis Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
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14
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Alkorta I, Cancedda C, Cocinero EJ, Dávalos JZ, Ecija P, Elguero J, González J, Lesarri A, Ramos R, Reviriego F, Roussel C, Uriarte I, Vanthuyne N. Static and dynamic properties of 1,1'-bi-2-naphthol and its conjugated acids and bases. Chemistry 2014; 20:14816-25. [PMID: 25234135 DOI: 10.1002/chem.201402686] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 07/10/2014] [Indexed: 11/10/2022]
Abstract
Several convergent techniques were used to characterize 1,1'-bi-2-naphthol (BINOL) and some of its properties. Its acidity in the gas-phase, from neutral species to monoanion, was measured by mass spectrometry. The conformation and structure of BINOL in the gas phase was determined by microwave rotational spectroscopy. NMR experiments in fluorosulfonic acid established that BINOL was monoprotonated on one of the hydroxyl oxygen atoms. The enantiomerization barriers reported in the literature for BINOL under neutral, basic, and acid conditions were analyzed with regard to the species involved. Finally, DFT calculations allowed all of these results to be gathered in a coherent picture of the BINOL structure.
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Affiliation(s)
- Ibon Alkorta
- Instituto de Química Médica, CSIC, Juan de la Cierva, 3, 28006 Madrid (Spain), Fax: (+34) 91-5644853.
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Carmona D, Lamata P, Sánchez A, Pardo P, Rodríguez R, Ramírez P, Lahoz FJ, García-Orduña P, Oro LA. Hydroxymethylpyridine containing half-sandwich complexes of Rh(iii), Ir(iii) or Ru(ii). Dalton Trans 2014; 43:15546-59. [DOI: 10.1039/c4dt02171a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Carmona D, Lamata P, Sánchez A, Pardo P, Rodríguez R, Ramírez P, Lahoz FJ, García-Orduña P, Oro LA. Chiral Brønsted Acid Catalysts. Activation of Methyl 3,3,3-Trifluoropyruvate by Hydroxymethylpyridine-Containing Half-Sandwich Complexes. Organometallics 2014. [DOI: 10.1021/om5005463] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daniel Carmona
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Pilar Lamata
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Antonio Sánchez
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Pilar Pardo
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Ricardo Rodríguez
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Paola Ramírez
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Fernando J. Lahoz
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Pilar García-Orduña
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Luis A. Oro
- Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Departamento de Química
Inorgánica, CSIC−Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
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Curvey N, Widaman AK, Rath NP, Bauer EB. Ruthenium complexes of the general formula [RuCl2(PHOX)2] and their catalytic activity in the Mukaiyama aldol reaction. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.03.111] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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