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Dissanayake D, Draper A, Liu Z, Jaunnoo N, Haven JJ, Forsyth C, McKay AI, Junkers T, Vidović D. Lewis acid catalysed polymerisation of cyclopentenone. Chem Sci 2024; 15:639-643. [PMID: 38179536 PMCID: PMC10762972 DOI: 10.1039/d3sc05186b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 11/30/2023] [Indexed: 01/06/2024] Open
Abstract
A modest structural change of a β-diketiminate-supported aluminium complex leads to dramatic differences in the reactivity towards cyclopentenone. While the bulkier complex efficiently executes Diels Alder transformations the smaller analogue performs unique polymerisation of this substrate. This observation appears to be unprecedented in the chemistry of Lewis acids and cyclic dienophiles as it represents a unique way to polymerise a functionalised olefin.
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Affiliation(s)
| | - Alysia Draper
- School of Chemistry, Monash University Clayton 3800 Australia
| | - Zhizhou Liu
- School of Chemistry, Monash University Clayton 3800 Australia
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences Suzhou 215163 China
| | | | - Joris J Haven
- School of Chemistry, Monash University Clayton 3800 Australia
| | - Craig Forsyth
- School of Chemistry, Monash University Clayton 3800 Australia
| | | | - Tanja Junkers
- School of Chemistry, Monash University Clayton 3800 Australia
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2
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Dissanayake D, Forsyth C, Vidović D. Synthesis, characterisation and reactivity studies of chiral β-diketiminate-like supported aluminium Lewis acid complexes towards difficult Diels Alder cycloadditions. Dalton Trans 2023; 52:4063-4076. [PMID: 36880570 DOI: 10.1039/d3dt00206c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Synthesis and characterisation of several chiral, oxazoline containing β-diketiminate type ligand supported-aluminium compounds are reported. Together with 1 equiv. of Na(BArCl4) (ArCl = 3,5-Cl2-C6H3), these chiral Lewis acid complexes, which possess an "achiral end" and "chiral end" have been successfully utilised as catalysts in asymmetric Diels-Alder reactions of 1,3-cyclohexadiene and several different chalcones. Systematic increase in the steric demand of the ligand's "achiral end" of these complexes resulted in enhanced enantioinduction for the cyclisation of 1,3-cyclohexadiene and chalcone. Further structural modifications of the "chiral end" clearly established that having a tert-butyl group connected to the stereogenic centre of the oxazoline fragment yielded the highest enantioselectivity value for the examined cyclisation. A substrate scope was then expanded using several different dienophiles (i.e. chalcones) generating an enantiomeric excess range of 24-68%.
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Affiliation(s)
| | - Craig Forsyth
- School of Chemistry, Monash University, Wellington Rd, Clayton VIC 3800, Australia.
| | - Dragoslav Vidović
- School of Chemistry, Monash University, Wellington Rd, Clayton VIC 3800, Australia.
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Zhai S, Forsyth C, Liu Z, Vidović D. Synthesis of Mono- and Acyclic Bis-aminoboranes via Controlled Hydroboration of Imines. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Siyuan Zhai
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
| | - Craig Forsyth
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
| | - Zhizhou Liu
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Dragoslav Vidović
- School of Chemistry, Faculty of Sciences, Monash University, 3800 Clayton, Australia
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Tinnermann H, Sung S, Csókás D, Toh ZH, Fraser C, Young RD. Alkali Metal Adducts of an Iron(0) Complex and Their Synergistic FLP-Type Activation of Aliphatic C-X Bonds. J Am Chem Soc 2021; 143:10700-10708. [PMID: 34251818 DOI: 10.1021/jacs.1c04815] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report the formation and full characterization of weak adducts between Li+ and Na+ cations and a neutral iron(0) complex, [Fe(CO)3(PMe3)2] (1), supported by weakly coordinating [BArF20] anions, [1·M][BArF20] (M = Li, Na). The adducts are found to synergistically activate aliphatic C-X bonds (X = F, Cl, Br, I, OMs, OTf), leading to the formation of iron(II) organyl compounds of the type [FeR(CO)3(PMe3)2][BArF20], of which several were isolated and fully characterized. Stoichiometric reactions with the resulting iron(II) organyl compounds show that this system can be utilized for homocoupling and cross-coupling reactions and the formation of new C-E bonds (E = C, H, O, N, S). Further, we utilize [1·M][BArF20] as a catalyst in a simple hydrodehalogenation reaction under mild conditions to showcase its potential use in catalytic reactions. Finally, the mechanism of activation is probed using DFT and kinetic experiments that reveal that the alkali metal and iron(0) center cooperate to cleave C-X via a mechanism closely related to intramolecular FLP activation.
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Affiliation(s)
- Hendrik Tinnermann
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Simon Sung
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Dániel Csókás
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Zhi Hao Toh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Craig Fraser
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Rowan D Young
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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Young TA, Martí-Centelles V, Wang J, Lusby PJ, Duarte F. Rationalizing the Activity of an “Artificial Diels-Alderase”: Establishing Efficient and Accurate Protocols for Calculating Supramolecular Catalysis. J Am Chem Soc 2019; 142:1300-1310. [DOI: 10.1021/jacs.9b10302] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Tom A. Young
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Vicente Martí-Centelles
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, U.K
| | - Jianzhu Wang
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, U.K
| | - Paul J. Lusby
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, Scotland EH9 3FJ, U.K
| | - Fernanda Duarte
- Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
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Desat ME, Kretschmer R. Dinuclear Aluminum Halide Complexes Based on Bis(β-diketiminate) Ligands: Synthesis, Structures, and Electrochemical Characterization. Inorg Chem 2019; 58:16302-16311. [PMID: 31729867 DOI: 10.1021/acs.inorgchem.9b02868] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Twenty-three dinuclear aluminum halide complexes based on bis(β-diketiminate) ligands with various flexible and rigid bridging groups have been synthesized and fully characterized by NMR and IR spectroscopy, cyclic voltammetry, and elemental analysis. In addition, nine complexes were structurally characterized by means of single-crystal X-ray diffraction. Attempts to reduce the dinuclear species using C8K remained unsuccessful, but the reduction potentials investigated by cyclic voltammetry indicate the principle feasibility.
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Affiliation(s)
- Marcella E Desat
- Inorganic Chemistry of Catalysis, Institute of Inorganic and Analytical Chemistry (IAAC) , Friedrich Schiller University Jena , Humboldtstraße 8 , 07743 Jena , Germany
| | - Robert Kretschmer
- Inorganic Chemistry of Catalysis, Institute of Inorganic and Analytical Chemistry (IAAC) , Friedrich Schiller University Jena , Humboldtstraße 8 , 07743 Jena , Germany.,Jena Center for Soft Matter (JCSM) , Friedrich Schiller University Jena , Philosophenweg 7 , 07743 Jena , Germany
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Dogra A, Gupta N. Aluminum‐Based Catalysts for Cycloaddition Reactions: Moving One Step Ahead in Sustainability. ChemistrySelect 2019. [DOI: 10.1002/slct.201902613] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ashima Dogra
- School of ChemistryShoolini University Bajhol, Solan (HP India
| | - Neeraj Gupta
- School of ChemistryShoolini University Bajhol, Solan (HP India
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Wang C, Lin Y, Tseng H, Lee G, Peng S, Chiu C. N‐Heterocyclic Carbene Complexes of Cp*–Aluminum Triflate. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chen‐Hao Wang
- Department of Chemistry National Taiwan University No. 1, Section 4, Roosevelt Road 10617 Taipei Taiwan
| | - Ya‐Fan Lin
- Department of Fragrance and Cosmetic Science Department of Medicinal and Applied Chemistry Kaohsiung Medical University 100 Shi‐Chuan 1st Rd. 80708 Kaohsiung San‐Ming Dist. Taiwan
| | - Hsi‐Ching Tseng
- Department of Chemistry National Taiwan University No. 1, Section 4, Roosevelt Road 10617 Taipei Taiwan
| | - Gene‐Shiang Lee
- Department of Chemistry National Taiwan University No. 1, Section 4, Roosevelt Road 10617 Taipei Taiwan
| | - Shie‐Ming Peng
- Department of Chemistry National Taiwan University No. 1, Section 4, Roosevelt Road 10617 Taipei Taiwan
| | - Ching‐Wen Chiu
- Department of Chemistry National Taiwan University No. 1, Section 4, Roosevelt Road 10617 Taipei Taiwan
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Liu Z, Vidović D. Michael Additions Catalyzed by a β-Diketiminate-Supported Aluminum Complex. J Org Chem 2018; 83:5295-5300. [DOI: 10.1021/acs.joc.8b00434] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhizhou Liu
- Department of Chemistry, South University of Science and Technology of China, Shenzhen 518055, China
| | - Dragoslav Vidović
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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Liu Z, Ganguly R, Vidović D. Pursuing the active species in an aluminium-based Lewis acid system for catalytic Diels-Alder cycloadditions. Dalton Trans 2017; 46:753-759. [PMID: 27991617 DOI: 10.1039/c6dt04213a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Several Al-based complexes supported by a bis(imino)aryl NCN pincer ligand have been prepared. Systematic structural and experimental evidence identified a cationic species, supported by a THF molecule, as the best Lewis acid precatalyst for a range of Diels-Alder cycloadditions. This highlighted the importance of fully isolating and characterizing the active species in any catalytic process especially when Lewis acids are used due to the presence of hidden Brønsted acids (HBAs). Finally, the control experiments conducted in order to eliminate HBA activity that involve a bulky pyridine base should be performed with caution as the corresponding protonated pyridinium salt could also serve as a proton source.
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Affiliation(s)
- Zhizhou Liu
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, 637371, Singapore.
| | - Rakesh Ganguly
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, 637371, Singapore.
| | - Dragoslav Vidović
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, 637371, Singapore.
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Kingsley NB, Doyon TJ, Shephard LE. Synthesis and characterization of dialkylaluminum arylimine complexes. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2015.10.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Moskalev MV, Lukoyanov AN, Baranov EV, Fedushkin IL. Unexpected reactivity of an alkylaluminum complex of a non-innocent 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene ligand (dpp-bian). Dalton Trans 2016; 45:15872-15878. [DOI: 10.1039/c6dt01750a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The non-innocence of the bis-amido dpp-bian ligand has been documented by the reactions of compound 1 with acidic substrates, e.g. water.
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Affiliation(s)
- M. V. Moskalev
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- 603137 Nizhny Novgorod
- Russian Federation
| | - A. N. Lukoyanov
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- 603137 Nizhny Novgorod
- Russian Federation
| | - E. V. Baranov
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- 603137 Nizhny Novgorod
- Russian Federation
| | - I. L. Fedushkin
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- 603137 Nizhny Novgorod
- Russian Federation
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