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Cruz TFC, Loupy V, Veiros LF. Zinc-Catalyzed Hydroboration of Carbon Dioxide Amplified by Borane-Tethered Heteroscorpionate Bis(Pyrazolyl)methane Ligands. Inorg Chem 2024; 63:8244-8256. [PMID: 38656156 PMCID: PMC11080050 DOI: 10.1021/acs.inorgchem.4c00500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 04/09/2024] [Accepted: 04/11/2024] [Indexed: 04/26/2024]
Abstract
The borane-functionalized (BR2) bis(3,5-dimethylpyrazolyl)methane (LH) ligands 1a (BR2: 9-borabicyclo[3.3.1]nonane or 9-BBN), 1b (BR2: BCy2), and 1c (BR2: B(C6F5)2) were synthesized by the allylation-hydroboration of LH. Metalation of 1a,b with ZnCl2 yielded the heteroscorpionate dichloride complexes [(1a,b)ZnCl2] 3a,b. The reaction of 1a with ZnEt2 led to the formation of the zwitterionic complex [Et(1a)ZnEt(THF)] 5. The reaction of complex 3a with two equivalents of KHBEt3 under a carbon dioxide (CO2) atmosphere gave rise to the formation of the dimeric bis(formate) complex [(1a)Zn(OCHO)2]2 8, in which its borane moieties intermolecularly stabilize the formate ligands of opposite metal centers. The allylated precursor Lallyl and its zinc dichloride, diethyl and bis(formate) complexes [(Lallyl)ZnCl2] 2, [(Lallyl)ZnEt2] 4, and [(Lallyl)Zn(OCHO)2] 7 were also isolated. The catalyst systems composed of 1 mol % of 3a or 3b and two equivalents of KHBEt3 hydroborated CO2 at 1 bar with pinacolborane (HBPin) to the methanol-level product H3COBPin (and PinBOBPin) in yields of 42 or 86%, respectively. The catalyst systems using the unfunctionalized complex [(LH)ZnCl2] 6 and KHBEt3 or KHBEt3/nOctBR2 (BR2: 9-BBN or BCy2) hydroborated CO2 to H3COBPin but in 2.5- to 6-fold lower activities than those exhibited by 3a,b/KHBEt3. The hydroboration of CO2 using 8 as a catalyst led to yields of 39-43%, comparable to those obtained with 3a/KHBEt3. The results confirmed that the catalytic intermediates benefit from the incorporated boranes' intra- or intermolecular stabilizations.
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Affiliation(s)
- Tiago F. C. Cruz
- Centro de Química
Estrutural, Institute of Molecular Sciences, Departamento de Engenharia
Química, Instituto Superior Técnico,
Universidade de Lisboa, Av. Rovisco Pais, 1049 001 Lisboa, Portugal
| | - Valentin Loupy
- Centro de Química
Estrutural, Institute of Molecular Sciences, Departamento de Engenharia
Química, Instituto Superior Técnico,
Universidade de Lisboa, Av. Rovisco Pais, 1049 001 Lisboa, Portugal
| | - Luís F. Veiros
- Centro de Química
Estrutural, Institute of Molecular Sciences, Departamento de Engenharia
Química, Instituto Superior Técnico,
Universidade de Lisboa, Av. Rovisco Pais, 1049 001 Lisboa, Portugal
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Barber T. Altogether changed, and yet the same. Nat Chem 2023; 15:1495-1496. [PMID: 37907607 DOI: 10.1038/s41557-023-01355-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Affiliation(s)
- Thomas Barber
- School of Chemistry, University of Nottingham, Nottingham, UK.
- GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Nottingham, UK.
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Ni C, Pang Z, Qiao Y, Guo P, Ma X, Yang Z. Organoaluminum derived from Schiff bases: Synthesis, characterization and catalytic performance in hydroboration. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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van IJzendoorn B, Albawardi SF, Vitorica-Yrezabal IJ, Whitehead GFS, McGrady JE, Mehta M. A Zintl Cluster for Transition Metal-Free Catalysis: C═O Bond Reductions. J Am Chem Soc 2022; 144:21213-21223. [DOI: 10.1021/jacs.2c08559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Bono van IJzendoorn
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Saad F. Albawardi
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3QR, U.K
| | | | - George F. S. Whitehead
- X-ray Diffraction Facility, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - John E. McGrady
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3QR, U.K
| | - Meera Mehta
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
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Luo J, Cui C, Xiao Z, Zhong W, Lu C, Jiang X, Li X, Liu X. Iron(0) tricarbonyl η 4-1-azadiene complexes and their catalytic performance in the hydroboration of ketones, aldehydes and aldimines via a non-iron hydride pathway. Dalton Trans 2022; 51:11558-11566. [PMID: 35848404 DOI: 10.1039/d2dt01673g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Six iron(0) tricarbonyl complexes (1a-f) with a η4-1-azadiene moiety were prepared and their performance in the hydroboration of unsaturated organic compounds was investigated. All the complexes exhibit catalytic activity towards hydroboration of ketones, aldehydes and aldimines with pinacolborane (HBpin) as a hydride source to lead to secondary alcohols, primary alcohols, and secondary amines, respectively, after hydrolysis of the hydroboration products. Of the iron(0) tricarbonyl complexes, complex 1e is the most robust one and was employed throughout the catalytic investigation. Its preference towards the three types of substrates is as follows: aldimines > aldehydes ≫ ketones. In total, 24 substrates were examined for the catalytic hydroboration reactivity and generally, isolation yields ranging from 40% to 95% were achieved. Mechanistic investigation suggests that the catalytic hydroboration of the substrates proceeds via intramolecular hydride transfer without going through an Fe-H intermediate. As indicated by 1H NMR spectroscopic monitoring, the substrates and the borane agent bind to the iron centre and the imine N atom, respectively, which facilitates the hydride transfer by activating the B-H bond and polarizing the double bond of the substrates.
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Affiliation(s)
- Jiabin Luo
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541006, China. .,College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Chuanguo Cui
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541006, China. .,College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Zhiyin Xiao
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Wei Zhong
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Chunxin Lu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Xiujuan Jiang
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Xueming Li
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541006, China.
| | - Xiaoming Liu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
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Li Z, Huo S, Meng L, Li X. Roles of CO 2 in Controlling the Chemoselectivity of [LCu-Fp] Heterobimetallic-Catalyzed CO 2 Hydroboration Reduction: A Computational Study. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00104] [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)
- Zhendong Li
- College of Chemistry and Material Science, Hebei Key Laboratory of Inorganic and Nano-Materials, National Demonstration Center for Experimental Chemistry, Hebei Normal University, Shijiazhuang 050024, P. R. China
| | - Suhong Huo
- School of Safety Supervision, North China Institute of Science and Technology, No. 467 Academy Street, Sanhe Yanjiao Development Zone, Langfang 065201, China
| | - Lingpeng Meng
- College of Chemistry and Material Science, Hebei Key Laboratory of Inorganic and Nano-Materials, National Demonstration Center for Experimental Chemistry, Hebei Normal University, Shijiazhuang 050024, P. R. China
| | - Xiaoyan Li
- College of Chemistry and Material Science, Hebei Key Laboratory of Inorganic and Nano-Materials, National Demonstration Center for Experimental Chemistry, Hebei Normal University, Shijiazhuang 050024, P. R. China
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Geier SJ, Vogels CM, Melanson JA, Westcott SA. The transition metal-catalysed hydroboration reaction. Chem Soc Rev 2022; 51:8877-8922. [DOI: 10.1039/d2cs00344a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review covers the development of the transition metal-catalysed hydroboration reaction, from its beginnings in the 1980s to more recent developments including earth-abundant catalysts and an ever-expanding array of substrates.
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Affiliation(s)
- Stephen J. Geier
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Christopher M. Vogels
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Jennifer A. Melanson
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Stephen A. Westcott
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
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Li CQ, Leng G, Li W. Hydroboration of carbon dioxide with pinacolborane catalyzed by various aluminum hydrides: A comparative mechanistic study. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01024k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, density functional theory (DFT) calculations was performed to probe the catalytic viability of various neutral, cationic and anionic aluminum hydrides (AlH) in the hydroboration of CO2 with...
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