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Eaton MC, Knight BJ, Brahmi R, Ferreira RB, Catalano VJ, Rheingold AL, Ghiviriga I, Murray LJ. Synthetic Factors Governing Access to Tris(β-diketimine) Cyclophanes versus Tripodal Tri-β-aminoenones. J Org Chem 2020; 85:13579-13588. [PMID: 33107735 DOI: 10.1021/acs.joc.0c01708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tris(β-diketimine) cyclophanes are an important ligand class for investigating cooperative multimetallic interactions of bioinorganic clusters. Discussed herein are the synthetic factors governing access to tris(β-diketimine) cyclophanes versus tripodal tri-β-aminoenones. Cyclophanes bearing Me, Et, and MeO cap substituents and β-Me, Et, or Ph arm substituents are obtained, and a modified condensation method produced α-Me β-Me cyclophane. These operationally simple procedures produce the ligands in gram quantities and in 22-94% yields.
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Affiliation(s)
- Mary C Eaton
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, 214 Leigh Hall, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Brian J Knight
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, 214 Leigh Hall, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Robin Brahmi
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, 214 Leigh Hall, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Ricardo B Ferreira
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, 214 Leigh Hall, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Vincent J Catalano
- Department of Chemistry, University of Nevada, Reno, Nevada 89557, United States
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, San Diego, California 92093, United States
| | - Ion Ghiviriga
- Department of Chemistry, University of Florida, 214 Leigh Hall, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Leslie J Murray
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, 214 Leigh Hall, P.O. Box 117200, Gainesville, Florida 32611, United States
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2
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Martin J, Langer J, Wiesinger M, Elsen H, Harder S. Dibenzotropylidene Substituted Ligands for Early Main Group Metal‐Alkene Bonding. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000524] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Johannes Martin
- Inorganic and Organometallic Chemistry Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Egerlandstraße 1 91058 Erlangen Germany
| | - Jens Langer
- Inorganic and Organometallic Chemistry Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Egerlandstraße 1 91058 Erlangen Germany
| | - Michael Wiesinger
- Inorganic and Organometallic Chemistry Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Egerlandstraße 1 91058 Erlangen Germany
| | - Holger Elsen
- Inorganic and Organometallic Chemistry Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Egerlandstraße 1 91058 Erlangen Germany
| | - Sjoerd Harder
- Inorganic and Organometallic Chemistry Friedrich‐Alexander‐Universität Erlangen‐Nürnberg Egerlandstraße 1 91058 Erlangen Germany
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3
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Kretschmer R. Ligands with Two Monoanionic N,N-Binding Sites: Synthesis and Coordination Chemistry. Chemistry 2020; 26:2099-2119. [PMID: 31755598 PMCID: PMC7064907 DOI: 10.1002/chem.201903442] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/19/2019] [Indexed: 11/07/2022]
Abstract
Polytopic ligands have become ubiquitous in coordination chemistry because they grant access to a variety of mono- and polynuclear complexes of transition metals as well as rare-earth and main-group elements. Nitrogen-based ditopic ligands, in which two monoanionic N,N-binding sites are framed within one molecule, are of particular importance and are therefore the primary focus of this review. In detail, bis(amidine)s, bis(guanidine)s, bis(β-diimine)s, bis(aminotroponimine)s, bis(pyrrolimine)s, and miscellaneous bis(N,N-chelating) ligands are reviewed. In addition to the general synthetic protocols, the application of these ligands is discussed along with their coordination chemistry, the multifarious binding modes, and the ability of these ligands to bridge two (or more) metal(loids).
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Affiliation(s)
- Robert Kretschmer
- Junior Professorship Inorganic Chemistry of Catalysis, Institute of Inorganic and Analytical ChemistryFriedrich Schiller University JenaHumboldtstrasse 807743JenaGermany
- Jena Center for Soft Matter (JCSM)Friedrich Schiller University JenaPhilosophenweg 707743JenaGermany
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4
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Gohil H, Chatterjee S, Yadav S, Suresh E, Paital AR. An Ionophore for High Lithium Loading and Selective Capture from Brine. Inorg Chem 2019; 58:7209-7219. [DOI: 10.1021/acs.inorgchem.9b00135] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Hardipsinh Gohil
- Salt and Marine Chemicals Division & Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364002, Gujarat, India
| | - Sobhan Chatterjee
- Salt and Marine Chemicals Division & Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364002, Gujarat, India
| | - Sanjay Yadav
- Salt and Marine Chemicals Division & Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364002, Gujarat, India
| | - Eringathodi Suresh
- Analytical and Environmental Science Division and Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364002, Gujarat, India
| | - Alok Ranjan Paital
- Salt and Marine Chemicals Division & Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar-364002, Gujarat, India
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5
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Binuclear aluminum complexes supported by linked bis(β-diketiminate) ligands for ring-opening polymerization of cyclic esters. CHINESE JOURNAL OF POLYMER SCIENCE 2017. [DOI: 10.1007/s10118-018-2053-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Beattie JW, SantaLucia DJ, White DS, Groysman S. Oxalate-templated synthesis of di-zinc macrocycles. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.02.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Lu N, Jiang Z, Pei H, Liu W, Li Y, Dong Y. Ring‐Opening Polymerization of ε‐Caprolactone Initiated by Aluminium Complexes Based on Pyridine‐Substituted Asymmetric β‐Diketiminate Ligands. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601375] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ning Lu
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Zhilei Jiang
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Hao Pei
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Wei Liu
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Yahong Li
- College of Chemistry Chemical Engineering and Materials Science Soochow University 215123 Suzhou P. R. China
| | - Yaping Dong
- Key Laboratory of Salt Lake Resources and Chemistry Qinghai Institute of Salt Lakes Chinese Academy of Sciences 810008 Xining P. R. China
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Phanopoulos A, Leung AHM, Yow S, Palomas D, White AJP, Hellgardt K, Horton A, Crimmin MR. Binuclear β-diketiminate complexes of copper(i). Dalton Trans 2017; 46:2081-2090. [DOI: 10.1039/c6dt04246e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The reaction of a series of dinucleating bis(β-diketiminate) pro-ligands with mesitylcopper in the presence and absence of mono and diphosphines has allowed the isolation of a new series of dicopper(i) complexes.
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Affiliation(s)
| | | | - Shuhui Yow
- Department of Chemistry
- Imperial College London
- London
- UK
| | - David Palomas
- Department of Chemistry
- Imperial College London
- London
- UK
| | | | - Klaus Hellgardt
- Department of Chemical Engineering
- Imperial College London
- London
- UK
| | - Andrew Horton
- PTI/DX Emerging Technologies
- Shell Global Solutions International B.V
- 1030 BN Amsterdam
- The Netherlands
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Ermert DM, Gordon JB, Abboud KA, Murray LJ. Synthesis of Trinuclear Tin(II), Germanium(II), and Aluminum(III) Cyclophane Complexes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00354] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David M. Ermert
- Center
for Catalysis, Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Jesse B. Gordon
- Center
for Catalysis, Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Khalil A. Abboud
- Center
for Catalysis, Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Leslie J. Murray
- Center
for Catalysis, Department
of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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Sarish SP, Samuel PP, Roesky HW, Schulzke C, Nijesh K, De S, Parameswaran P. Multiple Cycloaddition Reactions of Ketones with a β-Diketiminate Al Compound. Chemistry 2015; 21:19041-7. [PMID: 26593152 DOI: 10.1002/chem.201503137] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Indexed: 11/09/2022]
Abstract
A β-diketiminate Al compound (1) with an exocyclic double bond reacts with two equivalents each of benzophenone and 2-benzoylpyridine in a [4+2] cycloaddition to generate bicyclic and tricyclic compounds 2 and 3, respectively. Compound 2 consists of six- and eight-membered aluminium rings, whereas 3 has two five- and one eight-membered ring. Compounds 2 and 3 were characterized by a number of analytical tools including single-crystal X-ray diffraction. The quantum mechanical calculations suggest that the dissociation of the solvent molecule from 1 would lead to an active species 1A having two 1,4-dipolar 4π electron moieties, in which the electrophilic site is the Al atom and the nucleophilic positions are polarized exocyclic and endocyclic C=C π bonds. The detailed mechanistic study shows that the dipolarophiles, benzophenone, and 2-benzoylpyridine undergo double cycloaddition with two 1,4-dipolar 4π electron moieties of 1A. Herein, the addition of one molecule of the dipolarophile promotes the addition of the second one.
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Affiliation(s)
| | - Prinson P Samuel
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany)
| | - Herbert W Roesky
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstrasse 4, 37077 Göttingen (Germany).
| | - Carola Schulzke
- Ernst-Moritz-Arndt-Universität, Institut für Biochemie, Arbeitskreis Bioanorganische Chemie, Felix-Hausdorff-Strasse 4, 17487 Greifswald (Germany).
| | - Karikkeeriyil Nijesh
- Department of Chemistry, National Institute of Technology Calicut, NIT Campus P.O., Kozhikhode 673 601 Kerala (India)
| | - Susmita De
- Department of Chemistry, National Institute of Technology Calicut, NIT Campus P.O., Kozhikhode 673 601 Kerala (India)
| | - Pattiyil Parameswaran
- Department of Chemistry, National Institute of Technology Calicut, NIT Campus P.O., Kozhikhode 673 601 Kerala (India).
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Altaf CT, Wang H, Keram M, Yang Y, Ma H. Aluminum methyl and isopropoxide complexes with ketiminate ligands: Synthesis, structural characterization and ring-opening polymerization of cyclic esters. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.05.055] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Whitehorne TJJ, Vabre B, Schaper F. Lactide polymerization catalyzed by Mg and Zn diketiminate complexes with flexible ligand frameworks. Dalton Trans 2014; 43:6339-52. [PMID: 24599488 DOI: 10.1039/c3dt53278j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Diketimine ligands bearing N-benzyl, N-9-anthrylmethyl and N-mesitylmethyl substituents (nacnac(Bn)H, nacnac(An)H, and nacnac(Mes)H) were prepared from condensation of the amine with either acetyl acetone or its ethylene glycol monoketal. Chlorination with N-chlorosuccinimide in the 3-position yielded Clnacnac(Bn)H and Clnacnac(An)H. The ligands were reacted with Zn(TMSA)2 (TMSA = N(SiMe3)2) to yield nacnac(An)Zn(TMSA) and Clnacnac(Bn)Zn(TMSA). Protonation with isopropanol afforded nacnac(An)ZnOiPr and Clnacnac(Bn)ZnOiPr. Reaction of the diketimines with Mg(TMSA)2 afforded nacnac(An)Mg(TMSA), nacnac(Mes)Mg(TMSA), Clnacnac(Bn)Mg(TMSA) and Clnacnac(An)Mg(TMSA). Subsequent protonation with tert-butanol produced nacnac(Mes)MgOtBu and Clnacnac(Bn)MgOtBu, but only decomposition was observed with N-anthrylmethyl substituents. Most complexes were characterized by X-ray diffraction studies. TMSA complexes were monomeric and alkoxide complexes dimeric in the solid state. All alkoxide complexes, as well as nacnac(An)Mg(TMSA)/BnOH and Clnacnac(An)Mg(TMSA)/BnOH were moderately to highly active in rac-lactide polymerization (90% conversion in 30 s to 3 h). nacnac(An)ZnOiPr produced highly heterotactic polymers (P(r) = 0.90), Clnacnac(Bn)MgOtBu/BnOH produced slightly isotactic polymers at -30 °C (P(r) = 0.43), and all other catalysts produced atactic polymers with a slight heterotactic bias.
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Affiliation(s)
- Todd J J Whitehorne
- Centre in Green Chemistry and Catalysis (CGCC), Département de chimie, Université de Montréal, 2900 Boul. E.-Montpetit, Montréal, QC, H3T 1J4, Canada.
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Guillet GL, Sloane FT, Ermert DM, Calkins MW, Peprah MK, Knowles ES, Čižmár E, Abboud KA, Meisel MW, Murray LJ. Preorganized assembly of three iron(ii) or manganese(ii) β-diketiminate complexes using a cyclophane ligand. Chem Commun (Camb) 2013; 49:6635-7. [DOI: 10.1039/c3cc43395a] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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14
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Su Y, Zhao Y, Gao J, Dong Q, Wu B, Yang XJ. Alkali Metal and Zinc Complexes of a Bridging 2,5-Diamino-1,4-Benzoquinonediimine Ligand. Inorg Chem 2012; 51:5889-96. [DOI: 10.1021/ic3004867] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yuanting Su
- State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China
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15
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Wilson DJD, Beavers CM, Richards AF. Di-, Tetra-, Penta- and Polynuclear Zinc Complexes Supported by a Flexible Tetradentate Schiff Base Ligand. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101202] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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16
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Falkenhagen JP, Haack P, Limberg C, Braun B. Organoelement Complexes of a Dinucleating Double β-Diiminato Ligand - Precedent Cases from Groups 1, 2, and 13. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.201100352] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Nawrat CC, Lewis W, Moody CJ. Synthesis of Amino-1,4-benzoquinones and Their Use in Diels–Alder Approaches to the Aminonaphthoquinone Antibiotics. J Org Chem 2011; 76:7872-81. [PMID: 21866924 DOI: 10.1021/jo201320g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christopher C. Nawrat
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - William Lewis
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Christopher J. Moody
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
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Minkin VI, Tsukanov AV, Dubonosov AD, Bren VA. Tautomeric Schiff bases: Iono-, solvato-, thermo- and photochromism. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.05.029] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Li Y, Wang JG, Duan T, Chen Q, Zhang QF. Silver(I) and mercury(II) complexes with N,N′-bis(acetylacetone)-1R,2R-diaminocyclohexane ligands exhibiting three different coordination modes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.12.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Haack P, Limberg C, Ray K, Braun B, Kuhlmann U, Hildebrandt P, Herwig C. Dinuclear Copper Complexes Based on Parallel β-Diiminato Binding Sites and their Reactions with O2: Evidence for a Cu−O−Cu Entity. Inorg Chem 2011; 50:2133-42. [DOI: 10.1021/ic101249k] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peter Haack
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | - Christian Limberg
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | - Kallol Ray
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | - Beatrice Braun
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | - Uwe Kuhlmann
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17 Juni 135, D-10623 Berlin, Germany
| | - Peter Hildebrandt
- Technische Universität Berlin, Institut für Chemie, Sekr. PC14, Strasse des 17 Juni 135, D-10623 Berlin, Germany
| | - Christian Herwig
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489 Berlin, Germany
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Vitanova DV, Hampel F, Hultzsch KC. Linked bis(β-diketiminato) yttrium and lanthanum complexes as catalysts in asymmetric hydroamination/cyclization of aminoalkenes (AHA). J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.09.051] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hart JS, Parsons S, Love JB. Chlorometallate and palladium cluster complexes of wide-span diimine and diamine ligands. Dalton Trans 2011; 40:12025-7. [DOI: 10.1039/c1dt10861a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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23
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El-Zoghbi I, Ased A, Oguadinma PO, Tchirioua E, Schaper F. One-pot synthesis of β-diketimine ligands. CAN J CHEM 2010. [DOI: 10.1139/v10-109] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Symmetric N,N′-dialkyl-2-amino-4-imino-pent-2-enes (nacnacRH) can be prepared in high yields in a simple one-pot reaction from acetylacetone and 2 equiv. of amine. Optimized conditions require the azeotropic removal of water, use of a minimum amount of solvent, and of 1 equiv. of acid. Either para-toluenesulfonic acid, hydrochloric acid, or a mixture of both can be employed, with the latter being most advantageous. Symmetric nacnacRH are thus obtained in higher than 95% purity and with 65% yield for R = Me and 80%–95% yields for R = n-Pr, i-Pr, i-Bu, Bn, Cy, and (+)-CH(Me)Ph.
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Affiliation(s)
- Ibrahim El-Zoghbi
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Aysha Ased
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Paul O. Oguadinma
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Ekou Tchirioua
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
| | - Frank Schaper
- Département de chimie, Université de Montréal, Montréal, QC H3C 3J7, Canada
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Oguadinma PO, Schaper F. π Back-Bonding in Dibenzyl-β-diketiminato Copper Olefin Complexes. Organometallics 2009. [DOI: 10.1021/om900840f] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul O. Oguadinma
- Département de Chimie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
| | - Frank Schaper
- Département de Chimie, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
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26
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Gong S, Ma H, Huang J. Zirconium and hafnium complexes supported by linked bis(β-diketiminate) ligands: synthesis, characterization and catalytic application in ethylene polymerization. Dalton Trans 2009:8237-47. [DOI: 10.1039/b905392a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Gong S, Ma H, Huang J. Zirconium complexes with versatile β-diketiminate ligands: Synthesis, structure, and ethylene polymerization. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.08.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Lesikar LA, Gushwa AF, Richards AF. Synthesis, characterization, and steric hindrance comparisons of selected transition and main group metal β-ketoiminato complexes. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.07.021] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Huang C, Hsueh L, Kuo P, Lee HM, Uno C, Huang J, Tu C, Hu C, Lee G, Hung C. Aluminum Complexes Containing Cyclohexane‐1,2‐diyl Linked Bis(ketiminato) Ligands and Proton‐Promoted Demethylation. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800057] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Synthesis and structures of some sterically hindered zinc complexes containing 6-membered and rings. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.02.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Pilz MF, Limberg C, Demeshko S, Meyer F, Ziemer B. Dinuclear iron complexes based on parallel β-diiminato binding sites: syntheses, structures and reaction with O2. Dalton Trans 2008:1917-23. [DOI: 10.1039/b715376g] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wei XH, Farwell JD, Hitchcock PB, Lappert MF. Synthesis and structures of some new types of lithium β-diketiminates. Dalton Trans 2008:1073-80. [DOI: 10.1039/b716888h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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