1
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Wang H. Synthesis, structure and reactivity of iminoborane radicals. Chem Commun (Camb) 2024; 60:3806-3809. [PMID: 38487988 DOI: 10.1039/d4cc00720d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The synthesis, characterization and reactivities of iminoborane radicals were reported. Both X-ray analysis and density functional theory calculations revealed that the unpaired electron delocalizes over the N(1)-C(1)-B(1)-N(2) moiety. Radical trap reactions showed that this radical species acts as a boron radical. These reactions also serve as methods for the synthesis of Lewis base-stabilized oxyl-terminated iminoboranes.
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Affiliation(s)
- Hanqiang Wang
- Department of Chemistry and Dongguan Key Laboratory for Data Science and Intelligent Medicine, Great Bay University, Dongguan 523000, China.
- Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen, Guangdong 518055, China
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2
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Gupta D, Einholz R, Bettinger HF. Strain induced reactivity of cyclic iminoboranes: the (2 + 2) cycloaddition of a 1 H-1,3,2-diazaborepine with ethene. Chem Sci 2024; 15:666-674. [PMID: 38179531 PMCID: PMC10763563 DOI: 10.1039/d3sc04901a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 11/19/2023] [Indexed: 01/06/2024] Open
Abstract
Iminoboranes have gathered immense attention due to their reactivity and potential applications as isoelectronic and isosteric alkynes. While cyclic alkynes are well investigated and useful reagents, cyclic iminoboranes are underexplored and their existence was inferred only via trapping experiments. We report the first direct spectroscopic evidence of a cyclic seven-membered iminoborane, 1-(tert-butyldimethylsilyl)-1H-1,3,2-diazaborepine 2, under cryogenic matrix isolation conditions. The amino-iminoborane 2 was photochemically generated in solid argon at 4 K from 2-azido-1-(tert-butyldimethylsilyl)-1,2-dihydro-1,2-azaborinine (3) and was characterized using FT-IR, UV-vis spectroscopy, and computational chemistry. The characteristic BN stretching vibration (1751 cm-1) is shifted by about 240 cm-1 compared to linear amino-iminoboranes indicating a significant weakening of the bond. The Lewis acidity value determined computationally (LAB = 9.1 ± 2.6) is similar to that of boron trichloride, and twelve orders of magnitude lower than that of 1,2-azaborinine (BN-aryne, LAB = 21.5 ± 2.6), a six-membered cyclic iminoborane. In contrast to the latter, the reduced ring strain of 2 precludes nitrogen fixation, but it unexpectedly allows facile (2 + 2) cycloaddition reaction with C2H4 under matrix isolation conditions at 30 K.
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Affiliation(s)
- Divanshu Gupta
- Institut für Organische Chemie, Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Ralf Einholz
- Institut für Organische Chemie, Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Holger F Bettinger
- Institut für Organische Chemie, Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
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3
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Braese J, Lehnfeld F, Annibale VT, Oswald T, Beckhaus R, Manners I, Scheer M. Titanium-Catalyzed Polymerization of a Lewis Base-Stabilized Phosphinoborane. Chemistry 2023; 29:e202301741. [PMID: 37498679 DOI: 10.1002/chem.202301741] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/21/2023] [Accepted: 07/27/2023] [Indexed: 07/29/2023]
Abstract
The reaction of the Lewis base-stabilized phosphinoborane monomer tBuHPBH2 NMe3 (2 a) with catalytic amounts of bis(η5 :η1 -adamantylidenepentafulvene)titanium (1) provides a convenient new route to the polyphosphinoborane [tBuPH-BH2 ]n (3 a). This method offers access to high molar mass materials under mild conditions and with short reaction times (20 °C, 1 h in toluene). It represents an unprecedented example of a transition metal-mediated polymerization of a Lewis base-stabilized Group 13/15 compound. Preliminary studies of the substrate scope and a potential mechanism are reported.
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Affiliation(s)
- Jens Braese
- Universität Regensburg, Institut für Anorganische Chemie, 94053, Regensburg, Germany
| | - Felix Lehnfeld
- Universität Regensburg, Institut für Anorganische Chemie, 94053, Regensburg, Germany
| | - Vincent T Annibale
- University of Victoria, Department of Chemistry, 3800 Finnerty Road, Victoria, BC V8P 5C2, Canada
| | - Tim Oswald
- Carl von Ossietzky Universität Oldenburg, Institut für Chemie Carl-von-Ossietzky, Straße 9-11, 26129, Oldenburg, Germany
| | - Rüdiger Beckhaus
- Carl von Ossietzky Universität Oldenburg, Institut für Chemie Carl-von-Ossietzky, Straße 9-11, 26129, Oldenburg, Germany
| | - Ian Manners
- University of Victoria, Department of Chemistry, 3800 Finnerty Road, Victoria, BC V8P 5C2, Canada
| | - Manfred Scheer
- Universität Regensburg, Institut für Anorganische Chemie, 94053, Regensburg, Germany
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4
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Ju MY, Fan ZH, Ma Y, Jing Y, Chen XM, Chen X. Syntheses, Structures, and Reactivities of N-Heterocyclic Carbene-Coordinated Aminoborane Complexes. Inorg Chem 2023. [PMID: 37224452 DOI: 10.1021/acs.inorgchem.3c00930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Recent research has attracted considerable attention toward N-heterocyclic carbene-coordinated boranes (NHC-borane) and their B-substituted derivatives because of their unique characteristics. In the present work, we focused on the syntheses, structures, and reactivities of such types of amine complexes, [NHC·BH2NH3]X ((NHC = IPr (1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) and IMe (1,3-dimethylimidazol-2-ylidene); X = Cl, I, OTf). We have developed a synthetic method to access NHC·BH2NH2 through the reaction of NaH with [IPr·BH2NH3]I, which was synthesized by the reaction of IPr·BH2I with NH3. As a Lewis base, NHC·BH2NH2 could further react with HCl or HOTf to produce the corresponding salts of [IPr·BH2NH3]+. IPr·BH2NH2BH2X (X = Cl, I) were synthesized by the reaction of HCl/I2 with IPr·BH2NH2BH3 and then converted to [IPr·BH2NH2BH2·IPr]X (X = Cl, I) by reacting with IPr. The IMe-coordinated boranes reacted quite similarly. The preliminary results revealed that the introduction of the NHC molecule has a considerable impact on the solubility and reactivities of aminoboranes.
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Affiliation(s)
- Ming-Yue Ju
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zi-Heng Fan
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yubin Ma
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yi Jing
- College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xi-Meng Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuenian Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
- College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
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5
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Wang J, Jia P, Sun W, Wei Y, Lin Z, Ye Q. Synthesis of Iminoboryl o-Carboranes by Lewis Base Promoted Aminoborirane-to-Iminoborane Isomerization. Inorg Chem 2022; 61:8879-8886. [PMID: 35649271 DOI: 10.1021/acs.inorgchem.2c00944] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The iminoboryl o-carboranes (Me3Si)-Cb-B≡N-R (Cb = B10C2H10, 3a, R = SiMe3; 3b, R = tBu) have been successfully synthesized by tetrahydrofuran (THF)-promoted isomerization from the corresponding o-carborane-fused aminoboriranes Cb{BN(SiMe3)R} (2). The synthetic protocol of the previously reported borirane 2a was optimized. The borirane Cb{BN(SiMe3)tBu} (2b) and the iminoboranes 3a and 3b were fully characterized by NMR, IR, and single-crystal X-ray diffraction analyses. The borirane 2a isomerizes more readily than 2b. The kinetics study revealed a bimolecular mechanism between borirane and THF, which is in good agreement with the computationally proposed reaction pathway. The title compounds are thermally robust, but compound 3a dimerized in the presence of a catalytic amount of tBuNC to give the cyclodimer 4. Quick equilibrium between 4 and the isonitrile adduct 4·tBuNC was observed in solution.
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Affiliation(s)
- Junyi Wang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, P. R. China.,Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong
| | - Penghui Jia
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Weicheng Sun
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Yuxiang Wei
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong
| | - Qing Ye
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, P. R. China.,Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, Würzburg 97074, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, Würzburg 97074, Germany
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6
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Guo R, Zhang X, Li T, Li Q, Ruiz DA, Liu LL, Tung CH, Kong L. Unraveling the reactivity of a cationic iminoborane: avenues to unusual boron cations. Chem Sci 2022; 13:2303-2309. [PMID: 35310477 PMCID: PMC8864711 DOI: 10.1039/d2sc00002d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Accepted: 01/26/2022] [Indexed: 11/21/2022] Open
Abstract
A cationic terminal iminoborane [Mes*N
Created by potrace 1.16, written by Peter Selinger 2001-2019
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B ← IPr2Me2][AlBr4] (3+[AlBr4]−) (Mes* = 2,4,6-tri-tert-butylphenyl and IPr2Me2 = 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene) has been synthesized and characterized. The employment of an aryl group and N-heterocyclic carbene (NHC) ligand enables 3+[AlBr4]− to exhibit both B-centered Lewis acidity and BN multiple bond reactivities, thus allowing for the construction of tri-coordinate boron cations 5+–12+. More importantly, initial reactions involving coordination, addition, and [2 + 3] cycloadditions have been observed for the cationic iminoborane, demonstrating the potential to build numerous organoboron species via several synthetic routes. An NHC-stabilized aryliminoboryl cation exhibits both boron-centered Lewis acidity and multiple bond reactivity and could be utilized as an effective synthon for unusual cationic boron species.![]()
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Affiliation(s)
- Rui Guo
- School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 P. R. China
| | - Xin Zhang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Tong Li
- School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 P. R. China
| | - Qianli Li
- School of Chemistry and Chemical Engineering, Liaocheng University Liaocheng 252059 P. R. China
| | - David A Ruiz
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Liu Leo Liu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology Shenzhen 518055 P. R. China
| | - Chen-Ho Tung
- School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 P. R. China
| | - Lingbing Kong
- School of Chemistry and Chemical Engineering, Shandong University Jinan 250100 P. R. China .,State Key Laboratory of Elemento-Organic Chemistry, Nankai University Tianjin 300071 P. R. China
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7
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Guo Q, Chen J, Shen G, Lu G, Yang X, Tang Y, Zhu Y, Wu S, Fan B. Tetrabutylammonium Bromide-Catalyzed Transfer Hydrogenation of Quinoxaline with HBpin as a Hydrogen Source. J Org Chem 2021; 87:540-546. [PMID: 34905381 DOI: 10.1021/acs.joc.1c02537] [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
A metal-free environmentally benign, simple, and efficient transfer hydrogenation process of quinoxaline has been developed using the HBpin reagent as a hydrogen source. This reaction is compatible with a variety of quinoxalines offering the desired tetrahydroquinoxalines in moderate-to-excellent yields with Bu4NBr as a noncorrosive and low-cost catalyst.
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Affiliation(s)
- Qi Guo
- Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University), State Ethnic Affairs Commission, Kunming 650500, China
| | - Jingchao Chen
- Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University), State Ethnic Affairs Commission, Kunming 650500, China.,Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, Yunnan University, Kunming 600091, China
| | - Guoli Shen
- Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University), State Ethnic Affairs Commission, Kunming 650500, China
| | - Guangfu Lu
- Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University), State Ethnic Affairs Commission, Kunming 650500, China
| | - Xuemei Yang
- Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University), State Ethnic Affairs Commission, Kunming 650500, China
| | - Yan Tang
- Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University), State Ethnic Affairs Commission, Kunming 650500, China
| | - Yuanbin Zhu
- Yunnan Tiefeng High Tech Mining Chemicals Co. Ltd., Qingfeng Industrial Park, Lufeng 651200, Yunnan, China
| | - Shiyuan Wu
- Yunnan Tiefeng High Tech Mining Chemicals Co. Ltd., Qingfeng Industrial Park, Lufeng 651200, Yunnan, China
| | - Baomin Fan
- Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University), State Ethnic Affairs Commission, Kunming 650500, China
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8
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Turani‐I‐Belloto K, Valero‐Pedraza M, Chiriac R, Toche F, Granier D, Cot D, Petit E, Yot PG, Alauzun JG, Demirci UB. A Series of Primary Alkylamine Borane Adducts C
x
H
2x+1
NH
2
BH
3
: Synthesis and Properties. ChemistrySelect 2021. [DOI: 10.1002/slct.202103126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kevin Turani‐I‐Belloto
- Institut Europeen des Membranes, IEM – UMR 5635 Universite de Montpellier, ENSCM, CNRS 34090 Montpellier France
| | - María‐José Valero‐Pedraza
- Institut Europeen des Membranes, IEM – UMR 5635 Universite de Montpellier, ENSCM, CNRS 34090 Montpellier France
| | - Rodica Chiriac
- Laboratoire des Multimateriaux et Interfaces UMR CNRS 5615 Univ Lyon 1 Université Claude Bernard Lyon 1 F-69622 Villeurbanne France
| | - François Toche
- Laboratoire des Multimateriaux et Interfaces UMR CNRS 5615 Univ Lyon 1 Université Claude Bernard Lyon 1 F-69622 Villeurbanne France
| | | | - Didier Cot
- Institut Europeen des Membranes, IEM – UMR 5635 Universite de Montpellier, ENSCM, CNRS 34090 Montpellier France
| | - Eddy Petit
- Institut Europeen des Membranes, IEM – UMR 5635 Universite de Montpellier, ENSCM, CNRS 34090 Montpellier France
| | - Pascal G. Yot
- ICGM Univ. Montpellier, CNRS, ENSCM Montpellier France
| | | | - Umit B. Demirci
- Institut Europeen des Membranes, IEM – UMR 5635 Universite de Montpellier, ENSCM, CNRS 34090 Montpellier France
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9
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Guo R, Li T, Wei R, Zhang X, Li Q, Liu LL, Tung CH, Kong L. Boraiminolithium: An Iminoborane-Transfer Reagent. J Am Chem Soc 2021; 143:13483-13488. [PMID: 34427439 DOI: 10.1021/jacs.1c06152] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BN/CC isosterism can give rise to attractive molecules with unique physical or chemical properties. We report here the synthesis, characterization, and reactivities of the boraiminolithium species 2, a room-temperature-stable crystalline solid accessible through a facile dehydrohalogenation/deprotonation reaction. This species, bearing a polarized B≡N triple bond and an anionic N center, is the first example of a BN analogue to the well-known alkynyllithium molecules (lithium acetylides). It has demonstrated a remarkable ability for iminoborane-transfer reactions, which allows for the isolation of a series of unprecedented N-functionalized iminoboranes as well as novel main-group heterocycles. Stable boraiminolithium reagents may become powerful tools in the exploration of new BN-containing building blocks for synthetic chemistry and materials science.
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Affiliation(s)
- Rui Guo
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Tong Li
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Rui Wei
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Xin Zhang
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Qianli Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China
| | - Liu Leo Liu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Chen-Ho Tung
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Lingbing Kong
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People's Republic of China
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10
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Lau S, Gasperini D, Webster RL. Amine-Boranes as Transfer Hydrogenation and Hydrogenation Reagents: A Mechanistic Perspective. Angew Chem Int Ed Engl 2021; 60:14272-14294. [PMID: 32935898 PMCID: PMC8248159 DOI: 10.1002/anie.202010835] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Indexed: 11/10/2022]
Abstract
Transfer hydrogenation (TH) has historically been dominated by Meerwein-Ponndorf-Verley (MPV) reactions. However, with growing interest in amine-boranes, not least ammonia-borane (H3 N⋅BH3 ), as potential hydrogen storage materials, these compounds have also started to emerge as an alternative reagent in TH reactions. In this Review we discuss TH chemistry using H3 N⋅BH3 and their analogues (amine-boranes and metal amidoboranes) as sacrificial hydrogen donors. Three distinct pathways were considered: 1) classical TH, 2) nonclassical TH, and 3) hydrogenation. Simple experimental mechanistic probes can be employed to distinguish which pathway is operating and computational analysis can corroborate or discount mechanisms. We find that the pathway in operation can be perturbed by changing the temperature, solvent, amine-borane, or even the substrate used in the system, and subsequently assignment of the mechanism can become nontrivial.
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Affiliation(s)
- Samantha Lau
- Department of ChemistryUniversity of BathClaverton DownBathUK
| | | | - Ruth L. Webster
- Department of ChemistryUniversity of BathClaverton DownBathUK
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11
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Zhang G, Morrison D, Bao G, Yu H, Yoon CW, Song T, Lee J, Ung AT, Huang Z. An Amine–Borane System Featuring Room‐Temperature Dehydrogenation and Regeneration. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Guojin Zhang
- School of Civil & Environmental Engineering University of Technology Sydney Ultimo New South Wales 2007 Australia
| | - Daniel Morrison
- School of Civil & Environmental Engineering University of Technology Sydney Ultimo New South Wales 2007 Australia
| | - Guochen Bao
- School of Civil & Environmental Engineering University of Technology Sydney Ultimo New South Wales 2007 Australia
| | - Haibo Yu
- Molecular Horizons and School of Chemistry & Molecular Bioscience Faculty of Science, Medicine & Health University of Wollongong Northfields Ave Wollongong NSW 2522 Australia
| | - Chang Won Yoon
- Center for Hydrogen and Fuel Cell Research Korea Institute of Science and Technology Seoul 02792 Republic of Korea
| | - Taekyong Song
- Hydrogen Research Center KOGAS Research Institute Incheon 21993 Republic of Korea
| | - Jihye Lee
- Hydrogen Research Center KOGAS Research Institute Incheon 21993 Republic of Korea
| | - Alison T. Ung
- School of Mathematical and Physical Sciences University of Technology Sydney Ultimo NSW 2007 Australia
| | - Zhenguo Huang
- School of Civil & Environmental Engineering University of Technology Sydney Ultimo New South Wales 2007 Australia
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12
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Zhang G, Morrison D, Bao G, Yu H, Yoon CW, Song T, Lee J, Ung AT, Huang Z. An Amine-Borane System Featuring Room-Temperature Dehydrogenation and Regeneration. Angew Chem Int Ed Engl 2021; 60:11725-11729. [PMID: 33844369 DOI: 10.1002/anie.202017302] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/15/2021] [Indexed: 11/07/2022]
Abstract
Amine-borane complexes have been extensively studied as hydrogen storage materials. Herein, we report a new amine-borane system featuring a reversible dehydrogenation and regeneration at room temperature. In addition to high purity H2 , the reaction between ethylenediamine bisborane (EDAB) and ethylenediamine (ED) leads to unique boron-carbon-nitrogen 5-membered rings in the dehydrogenation product where one boron is tricoordinated by three nitrogen atoms. Owing to the unique cyclic structure, the dehydrogenation product can be efficiently converted back to EDAB by NaBH4 and H2 O at room temperature. This finding could lead to the discovery of new amine boranes with potential usage as hydrogen storage materials.
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Affiliation(s)
- Guojin Zhang
- School of Civil & Environmental Engineering, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia
| | - Daniel Morrison
- School of Civil & Environmental Engineering, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia
| | - Guochen Bao
- School of Civil & Environmental Engineering, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia
| | - Haibo Yu
- Molecular Horizons and School of Chemistry & Molecular Bioscience, Faculty of Science, Medicine & Health, University of Wollongong, Northfields Ave, Wollongong, NSW, 2522, Australia
| | - Chang Won Yoon
- Center for Hydrogen and Fuel Cell Research, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Taekyong Song
- Hydrogen Research Center, KOGAS Research Institute, Incheon, 21993, Republic of Korea
| | - Jihye Lee
- Hydrogen Research Center, KOGAS Research Institute, Incheon, 21993, Republic of Korea
| | - Alison T Ung
- School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Zhenguo Huang
- School of Civil & Environmental Engineering, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia
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13
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Lau S, Gasperini D, Webster RL. Amine–Boranes as Transfer Hydrogenation and Hydrogenation Reagents: A Mechanistic Perspective. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010835] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Samantha Lau
- Department of Chemistry University of Bath Claverton Down Bath UK
| | - Danila Gasperini
- Department of Chemistry University of Bath Claverton Down Bath UK
| | - Ruth L. Webster
- Department of Chemistry University of Bath Claverton Down Bath UK
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14
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Zhai X, Pang M, Feng L, Jia J, Tung CH, Wang W. Dehydrogenation of iron amido-borane and resaturation of the imino-borane complex. Chem Sci 2021; 12:2885-2889. [PMID: 34164054 PMCID: PMC8179412 DOI: 10.1039/d0sc06787c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We report on the first isolation and structural characterization of an iron phosphinoimino-borane complex Cp*Fe(η2-H2B
Created by potrace 1.16, written by Peter Selinger 2001-2019
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NC6H4PPh2) by dehydrogenation of iron amido-borane precursor Cp*Fe(η1-H3B–NHC6H4PPh2). Significantly, regeneration of the amido-borane complex has been realized by protonation of the iron(ii) imino-borane to the amino-borane intermediate [Cp*Fe(η2-H2B–NHC6H4PPh2)]+ followed by hydride transfer. These new iron species are efficient catalysts for 1,2-selective transfer hydrogenation of quinolines with ammonia borane. Dehydrogenation of an amido-borane iron complex provides an imino-borane complex. Regeneration of the amido-borane precursor was achieved by protonation of the imino-borane followed by hydride transfer to the amino-borane intermediate.![]()
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Affiliation(s)
- Xiaofang Zhai
- School of Chemistry and Chemical Engineering, Shandong University No. 27 South Shanda Road Jinan 250100 China
| | - Maofu Pang
- School of Chemistry and Chemical Engineering, Shandong University No. 27 South Shanda Road Jinan 250100 China
| | - Lei Feng
- School of Chemistry and Chemical Engineering, Shandong University No. 27 South Shanda Road Jinan 250100 China
| | - Jiong Jia
- School of Chemistry and Chemical Engineering, Shandong University No. 27 South Shanda Road Jinan 250100 China
| | - Chen-Ho Tung
- School of Chemistry and Chemical Engineering, Shandong University No. 27 South Shanda Road Jinan 250100 China
| | - Wenguang Wang
- School of Chemistry and Chemical Engineering, Shandong University No. 27 South Shanda Road Jinan 250100 China .,College of Chemistry, Beijing Normal University No. 19 Xinjiekouwai St Beijing 100875 China
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15
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Li H, Ju M, Kang J, Zhou AJ, Guan HY, Austin DJ, Yue Y. Facile cyclization of sodium aminodiboranate to construct a boron-nitrogen-hydrogen ring. Dalton Trans 2020; 49:16662-16666. [PMID: 33196721 DOI: 10.1039/d0dt03398g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile and efficient cyclization of sodium aminodiboranate to construct a boron-nitrogen-hydrogen ring is presented. This new strategy can be developed into a general method to prepare aminodiborane and its derivatives. Theoretical calculations show that a one-step cyclization mechanism is favored, where the dihydrogen bond plays an important role.
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Affiliation(s)
- Huizhen Li
- School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, Guangdong 510006, China.
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16
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Gelis C, Heusler A, Nairoukh Z, Glorius F. Catalytic Transfer Hydrogenation of Arenes and Heteroarenes. Chemistry 2020; 26:14090-14094. [PMID: 32519788 PMCID: PMC7702167 DOI: 10.1002/chem.202002777] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Indexed: 01/19/2023]
Abstract
Transfer hydrogenation reactions are of great interest to reduce diverse molecules under mild reaction conditions. To date, this type of reaction has only been successfully applied to alkenes, alkynes and polarized unsaturated compounds such as ketones, imines, pyridines, etc. The reduction of benzene derivatives by transfer hydrogenation has never been described, which is likely due to the high energy barrier required to dearomatize these compounds. In this context, we have developed a catalytic transfer hydrogenation reaction for the reduction of benzene derivatives and heteroarenes to form complex 3-dimensional scaffolds bearing various functional groups at room temperature without needing compressed hydrogen gas.
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Affiliation(s)
- Coralie Gelis
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Arne Heusler
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Zackaria Nairoukh
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
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17
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Wang Y, Cao X, Zhao L, Pi C, Ji J, Cui X, Wu Y. Generalized Chemoselective Transfer Hydrogenation/Hydrodeuteration. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000759] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yong Wang
- Henan Key Laboratory of Chemical Biology and Organic Chemistry Key Laboratory of Applied Chemistry of Henan Universities Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Xinyi Cao
- International College Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Leyao Zhao
- International College Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Chao Pi
- Henan Key Laboratory of Chemical Biology and Organic Chemistry Key Laboratory of Applied Chemistry of Henan Universities Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Jingfei Ji
- International College Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Xiuling Cui
- Henan Key Laboratory of Chemical Biology and Organic Chemistry Key Laboratory of Applied Chemistry of Henan Universities Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450052 People's Republic of China
| | - Yangjie Wu
- Henan Key Laboratory of Chemical Biology and Organic Chemistry Key Laboratory of Applied Chemistry of Henan Universities Green Catalysis Center and College of Chemistry Zhengzhou University Zhengzhou 450052 People's Republic of China
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18
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Şen B, Aygün A, Şavk A, Gülbağça F, Gülbay SK, Çalımlı MH, Şen F. Binary Palladium–Nickel/Vulcan carbon-based nanoparticles as highly efficient catalyst for hydrogen evolution reaction at room temperature. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.04.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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19
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Boom DHA, Jupp AR, Slootweg JC. Dehydrogenation of Amine-Boranes Using p-Block Compounds. Chemistry 2019; 25:9133-9152. [PMID: 30964220 PMCID: PMC6771515 DOI: 10.1002/chem.201900679] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Indexed: 01/11/2023]
Abstract
Amine-boranes have gained a lot of attention due to their potential as hydrogen storage materials and their capacity to act as precursors for transfer hydrogenation. Therefore, a lot of effort has gone into the development of suitable transition- and main-group metal catalysts for the dehydrogenation of amine-boranes. During the past decade, new systems started to emerge solely based on p-block elements that promote the dehydrogenation of amine-boranes through hydrogen-transfer reactions, polymerization initiation, and main-group catalysis. In this review, we highlight the development of these p-block based systems for stoichiometric and catalytic amine-borane dehydrogenation and discuss the underlying mechanisms.
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Affiliation(s)
- Devin H. A. Boom
- Van 't Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041090 GDAmsterdamThe Netherlands
| | - Andrew R. Jupp
- Van 't Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041090 GDAmsterdamThe Netherlands
| | - J. Chris Slootweg
- Van 't Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041090 GDAmsterdamThe Netherlands
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20
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Dömling M, Arrowsmith M, Schmidt U, Werner L, Castro AC, Jiménez-Halla JOC, Bertermann R, Müssig J, Prieschl D, Braunschweig H. Spontaneous trans-Selective Transfer Hydrogenation of Apolar Boron-Boron Double Bonds. Angew Chem Int Ed Engl 2019; 58:9782-9786. [PMID: 31062910 DOI: 10.1002/anie.201902656] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/20/2019] [Indexed: 01/13/2023]
Abstract
The transfer hydrogenation of N-heterocyclic carbene (NHC)-supported diborenes with dimethylamine borane proceeds with high selectivity for the trans-1,2-dihydrodiboranes. DFT calculations, supported by kinetic studies and deuteration experiments, suggest a stepwise proton-first-hydride-second reaction mechanism via an intermediate μ-hydrodiboronium dimethylaminoborate ion pair.
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Affiliation(s)
- Michael Dömling
- Institut für Anorganische Chemie & the Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Merle Arrowsmith
- Institut für Anorganische Chemie & the Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Uwe Schmidt
- Institut für Anorganische Chemie & the Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Luis Werner
- Institut für Anorganische Chemie & the Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Abril C Castro
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta S/N, 36050, Guanajuato, Mexico
| | - J Oscar C Jiménez-Halla
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta S/N, 36050, Guanajuato, Mexico
| | - Rüdiger Bertermann
- Institut für Anorganische Chemie & the Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jonas Müssig
- Institut für Anorganische Chemie & the Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Dominic Prieschl
- Institut für Anorganische Chemie & the Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie & the Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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21
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Dömling M, Arrowsmith M, Schmidt U, Werner L, Castro AC, Jiménez‐Halla JOC, Bertermann R, Müssig J, Prieschl D, Braunschweig H. Spontane
trans
‐selektive Transferhydrierung von unpolaren B=B‐Doppelbindungen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902656] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Michael Dömling
- Institut für Anorganische Chemie &, the Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Merle Arrowsmith
- Institut für Anorganische Chemie &, the Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Uwe Schmidt
- Institut für Anorganische Chemie &, the Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Luis Werner
- Institut für Anorganische Chemie &, the Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Abril C. Castro
- Departamento de QuímicaDivisión de Ciencias Naturales y ExactasUniversidad de Guanajuato Noria Alta S/N 36050 Guanajuato Mexiko
| | - J. Oscar C. Jiménez‐Halla
- Departamento de QuímicaDivisión de Ciencias Naturales y ExactasUniversidad de Guanajuato Noria Alta S/N 36050 Guanajuato Mexiko
| | - Rüdiger Bertermann
- Institut für Anorganische Chemie &, the Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Jonas Müssig
- Institut für Anorganische Chemie &, the Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Dominic Prieschl
- Institut für Anorganische Chemie &, the Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Holger Braunschweig
- Institut für Anorganische Chemie &, the Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
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22
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Espinal-Viguri M, Neale SE, Coles NT, Macgregor SA, Webster RL. Room Temperature Iron-Catalyzed Transfer Hydrogenation and Regioselective Deuteration of Carbon-Carbon Double Bonds. J Am Chem Soc 2018; 141:572-582. [PMID: 30518206 DOI: 10.1021/jacs.8b11553] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An iron catalyst has been developed for the transfer hydrogenation of carbon-carbon multiple bonds. Using a well-defined β-diketiminate iron(II) precatalyst, a sacrificial amine and a borane, even simple, unactivated alkenes such as 1-hexene undergo hydrogenation within 1 h at room temperature. Tuning the reagent stoichiometry allows for semi- and complete hydrogenation of terminal alkynes. It is also possible to hydrogenate aminoalkenes and aminoalkynes without poisoning the catalyst through competitive amine ligation. Furthermore, by exploiting the separate protic and hydridic nature of the reagents, it is possible to regioselectively prepare monoisotopically labeled products. DFT calculations define a mechanism for the transfer hydrogenation of propene with nBuNH2 and HBpin that involves the initial formation of an iron(II)-hydride active species, 1,2-insertion of propene, and rate-limiting protonolysis of the resultant alkyl by the amine N-H bond. This mechanism is fully consistent with the selective deuteration studies, although the calculations also highlight alkene hydroboration and amine-borane dehydrocoupling as competitive processes. This was resolved by reassessing the nature of the active transfer hydrogenation agent: experimentally, a gel is observed in catalysis, and calculations suggest this can be formulated as an oligomeric species comprising H-bonded amine-borane adducts. Gel formation serves to reduce the effective concentrations of free HBpin and nBuNH2 and so disfavors both hydroboration and dehydrocoupling while allowing alkene migratory insertion (and hence transfer hydrogenation) to dominate.
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Affiliation(s)
- Maialen Espinal-Viguri
- Department of Chemistry , University of Bath , Claverton Down, Bath BA2 7AY , United Kingdom
| | - Samuel E Neale
- Institute of Chemical Sciences , Heriot-Watt University , Edinburgh EH14 4AS , United Kingdom
| | - Nathan T Coles
- Department of Chemistry , University of Bath , Claverton Down, Bath BA2 7AY , United Kingdom
| | - Stuart A Macgregor
- Institute of Chemical Sciences , Heriot-Watt University , Edinburgh EH14 4AS , United Kingdom
| | - Ruth L Webster
- Department of Chemistry , University of Bath , Claverton Down, Bath BA2 7AY , United Kingdom
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