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Guo FK, Lu YL, Huang MY, Yang JM, Guo JL, Wan ZY, Zhu SF. Wittig/B─H insertion reaction: A unique access to trisubstituted Z-alkenes. SCIENCE ADVANCES 2023; 9:eadj2486. [PMID: 37703379 PMCID: PMC10499320 DOI: 10.1126/sciadv.adj2486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/11/2023] [Indexed: 09/15/2023]
Abstract
The Wittig reaction, which is one of the most effective methods for synthesizing alkenes from carbonyl compounds, generally gives thermodynamically stable E-alkenes, and synthesis of trisubstituted Z-alkenes from ketones presents notable challenges. Here, we report what we refer to as Wittig/B─H insertion reactions, which innovatively combine a Wittig reaction with carbene insertion into a B─H bond and constitute a promising method for the synthesis of thermodynamically unstable trisubstituted Z-boryl alkenes. Combined with the easy transformations of boryl group, this methodology provides efficient access to a variety of previously unavailable trisubstituted Z-alkenes and thus provides a platform for discovery of pharmaceuticals. The unique Z-selectivity of the reaction is determined by the maximum overlap of the orbitals between the B─H bond of the borane adduct and the alkylidene carbene intermediate in the transition state.
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Affiliation(s)
- Feng-Kai Guo
- Frontiers Science Center for New Organic Matter, the State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yi-Lin Lu
- Frontiers Science Center for New Organic Matter, the State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ming-Yao Huang
- Frontiers Science Center for New Organic Matter, the State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ji-Min Yang
- Frontiers Science Center for New Organic Matter, the State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jia-Lei Guo
- Frontiers Science Center for New Organic Matter, the State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zi-Yi Wan
- Frontiers Science Center for New Organic Matter, the State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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2
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Lu H, Li B. Transition Metal Catalyzed Asymmetric Hydroboration of Internal Alkenes. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202207040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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3
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Deis T, Medici F, Poussard-Schulz A, Lemière G, Fensterbank L. Synthesis and reactivity of an anionic NHC-borane featuring a weakly coordinating silicate anion. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Wang Q, Meng W, Feng X, Du H. B(
C
6
F
5
)
3
‐Catalyzed
Hydroboration of Alkenes with
N
‐Heterocyclic
Carbene Boranes
via
B—H Bond Activation. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000489] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Qiaotian Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190, China University of Chinese Academy of Sciences Beijing 100049 China
| | - Wei Meng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190, China University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiangqing Feng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190, China University of Chinese Academy of Sciences Beijing 100049 China
| | - Haifeng Du
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190, China University of Chinese Academy of Sciences Beijing 100049 China
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5
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Ji Y, Zhang M, Xing M, Cui H, Zhao Q, Zhang C. Transition Metal Catalyzed Enantioselective Borylative Cyclization Reactions. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000419] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yuqi Ji
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Rd. 92 Tianjin 300072 China
| | - Min Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Rd. 92 Tianjin 300072 China
| | - Mimi Xing
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Rd. 92 Tianjin 300072 China
| | - Huanhuan Cui
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Rd. 92 Tianjin 300072 China
| | - Qian Zhao
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Rd. 92 Tianjin 300072 China
| | - Chun Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Weijin Rd. 92 Tianjin 300072 China
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6
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Jin JK, Zheng WX, Xia HM, Zhang FL, Wang YF. Regioselective Radical Hydroboration of gem-Difluoroalkenes: Synthesis of α-Borylated Organofluorines. Org Lett 2019; 21:8414-8418. [PMID: 31596598 DOI: 10.1021/acs.orglett.9b03173] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A regioselective radical hydroboration of gem-difluoroalkenes was developed for the synthesis of α-difluoroalkylborons. The reaction features excellent regioselectivity, broad substrate scope, and good functional group capability. DFT calculations implicated the remarkable α-selectivity was driven from the kinetically and thermodynamically more favorable α-addition step. The resulting α-difluoroalkylborons could be readily converted into NHC-borane-tethered monofluoroalkenes, which demonstrated unique reactivity and applicability in the synthesis of monofluoroalkene derivatives through transformations of the boron unit.
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Affiliation(s)
- Ji-Kang Jin
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis of CAS, and Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
| | - Wan-Xin Zheng
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis of CAS, and Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
| | - Hui-Min Xia
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis of CAS, and Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
| | - Feng-Lian Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis of CAS, and Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
| | - Yi-Feng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis of CAS, and Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China.,State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin 300071 , China
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7
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Vallet A, Telitel S, Lalevée J, Lacôte E. Reactivity of B‐Xanthyl N‐Heterocyclic Carbene‐Boranes. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anne‐Laure Vallet
- ICSN-CNRSBâtiment 27 1 avenue de la Terrasse FR-91198 Gif-sur-Yvette Cedex France
| | - Sofia Telitel
- Université de Haute-AlsaceCNRSIS2M UMR 7361 FR-68100 Mulhouse France
| | - Jacques Lalevée
- Université de Haute-AlsaceCNRSIS2M UMR 7361 FR-68100 Mulhouse France
| | - Emmanuel Lacôte
- Univ. LyonUniversité Claude Bernard Lyon 1CNRSCNESArianeGroupLHCEPBât. Raulin 2 rue Victor Grignard FR-69622 Villeurbanne France
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8
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Aupic C, Abdou Mohamed A, Figliola C, Nava P, Tuccio B, Chouraqui G, Parrain JL, Chuzel O. Highly diastereoselective preparation of chiral NHC-boranes stereogenic at the boron atom. Chem Sci 2019; 10:6524-6530. [PMID: 31341605 PMCID: PMC6611065 DOI: 10.1039/c9sc01454c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 05/23/2019] [Indexed: 11/21/2022] Open
Abstract
Stereogenic main group elements are clearly generating interest in the enantioselective catalysis field. Surprisingly, while chiral organoboron reagents are very useful in stereoselective transformations, few scaffolds stereogenic at boron and configurationally stable have been reported to date. Herein, we describe an original library of chiral NHC-boranes, stereogenic at the boron atom, that has been prepared in only a few steps and in good yields (up to 93%). Key steps involve a chlorination/arylation sequence in the presence of simple Grignard reagents from bicyclic NHC-boranes. The high and unprecedented diastereoselectivity observed during the second step (up to 99 : 1 dr) has been rationalized through a plausible SRN1 mechanism thanks to EPR observations and DFT calculations.
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Affiliation(s)
- Clara Aupic
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Amel Abdou Mohamed
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Carlotta Figliola
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Paola Nava
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | | | - Gaëlle Chouraqui
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Jean-Luc Parrain
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
| | - Olivier Chuzel
- Aix Marseille Univ , CNRS , Centrale Marseille, iSm2 , Marseille , France .
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9
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Dietz M, Johnson A, Martínez-Martínez A, Weller AS. The [Rh(Xantphos)]+ catalyzed hydroboration of diphenylacetylene using trimethylamine-borane. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.03.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Zhao Q, Dewhurst RD, Braunschweig H, Chen X. Boranchemie aus einer neuen Perspektive: Nukleophilie der B-H-Bindungselektronen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201809733] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Qianyi Zhao
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials; School of Chemistry and Chemical Engineering; Henan Normal University; 46 E. Jianshe Rd. Xinxiang Henan 453007 China
| | - Rian D. Dewhurst
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
| | - Holger Braunschweig
- Institut für Anorganische Chemie und Institut für nachhaltige Chemie und Katalyse mit Bor; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Deutschland
| | - Xuenian Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials; School of Chemistry and Chemical Engineering; Henan Normal University; 46 E. Jianshe Rd. Xinxiang Henan 453007 China
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou Henan 450001 China
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11
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Zhao Q, Dewhurst RD, Braunschweig H, Chen X. A New Perspective on Borane Chemistry: The Nucleophilicity of the B−H Bonding Pair Electrons. Angew Chem Int Ed Engl 2019; 58:3268-3278. [DOI: 10.1002/anie.201809733] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 10/22/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Qianyi Zhao
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials; School of Chemistry and Chemical Engineering; Henan Normal University; 46 E. Jianshe Rd. Xinxiang Henan 453007 China
| | - Rian D. Dewhurst
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron; Julius-Maximilians-Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Xuenian Chen
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials; School of Chemistry and Chemical Engineering; Henan Normal University; 46 E. Jianshe Rd. Xinxiang Henan 453007 China
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou Henan 450001 China
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12
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Nava P, Toure M, Abdou Mohamed A, Parrain JL, Chuzel O. Investigation of the rhodium-catalyzed hydroboration of NHC-boranes: the role of alkene coordination and the origin of enantioselectivity. Dalton Trans 2019; 48:17605-17611. [DOI: 10.1039/c9dt03660a] [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
The mechanism of the intramolecular enantioselective rhodium(i)-catalyzed hydroboration of NHC-boranes is investigated by experiments and calculations, using Density Functional Theory and Random Phase Approximation methods.
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Affiliation(s)
- Paola Nava
- Aix Marseille University
- CNRS
- Marseille
- France
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13
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You DK, Lee JH, Hwang H, Kwon H, Park MH, Lee KM. Deboronation-induced ratiometric emission sensing of fluoride by 1,3,5-tris-(o-carboranyl-methyl)benzene. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.07.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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14
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You DK, Lee JH, Choi BH, Hwang H, Lee MH, Lee KM, Park MH. Effects of Multi-Carborane Substitution on the Photophysical and Electron-Accepting Properties of o
-Carboranylbenzene Compounds. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700192] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dong Kyun You
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Ji Hye Lee
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Byung Hoon Choi
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Hyonseok Hwang
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry and EHSRC; University of Ulsan; 44610 Ulsan Republic of Korea
| | - Kang Mun Lee
- Department of Chemistry; Institute for Molecular Science and Fusion Technology; Kangwon National University; 24341 Chuncheon Gangwon Republic of Korea
| | - Myung Hwan Park
- Department of Chemistry Education; Chungbuk National University; 28644 Cheongju Chungbuk Republic of Korea
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15
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Ren SC, Zhang FL, Qi J, Huang YS, Xu AQ, Yan HY, Wang YF. Radical Borylation/Cyclization Cascade of 1,6-Enynes for the Synthesis of Boron-Handled Hetero- and Carbocycles. J Am Chem Soc 2017; 139:6050-6053. [DOI: 10.1021/jacs.7b01889] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Shi-Chao Ren
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Feng-Lian Zhang
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Jing Qi
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yun-Shuai Huang
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Ai-Qing Xu
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Hong-Yi Yan
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yi-Feng Wang
- Hefei National Laboratory
for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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16
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Yang JM, Li ZQ, Li ML, He Q, Zhu SF, Zhou QL. Catalytic B-H Bond Insertion Reactions Using Alkynes as Carbene Precursors. J Am Chem Soc 2017; 139:3784-3789. [PMID: 28195708 DOI: 10.1021/jacs.6b13168] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Herein, we report transition-metal-catalyzed B-H bond insertion reactions between borane adducts and alkynes to afford organoboron compounds in excellent yields under mild reaction conditions. This successful use of alkynes as carbene precursors in these reactions constitutes a new route to organoboron compounds. The starting materials are safe and readily available, and the reaction exhibits 100% atom-economy. Moreover, an asymmetric version catalyzed by chiral dirhodium complexes produced chiral boranes with excellent enantioselectivity (up to 96% ee). This is the first report of highly enantioselective heteroatom-hydrogen bond insertion reactions of metal carbenes generated in situ from alkynes. The chiral products of the reaction could be easily transformed to widely used borates and diaryl methanol compounds without loss of optical purity, which demonstrates its potential utility in organic synthesis. A kinetics study indicated that the Cu-catalyzed B-H bond insertion reaction is first order with respect to the catalyst and the alkyne and zero order with respect to the borane adduct, and no kinetic isotopic effect was observed in the reaction of the adduct. These results, along with density functional theory calculations, suggest that the formation of the Cu carbene is the rate-limiting step and that the B-H bond insertion is a fast, concerted process.
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Affiliation(s)
- Ji-Min Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Zi-Qi Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Mao-Lin Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Qiao He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Shou-Fei Zhu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Qi-Lin Zhou
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University , Tianjin 300071, China
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17
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Wang MH, Chen LY. An efficient FeCl 3 -mediated approach for reduction of ketones through N -heterocyclic carbene boranes. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Rhoades TC, Wistrom JC, Daniel Johnson R, Miller KM. Thermal, mechanical and conductive properties of imidazolium-containing thiol-ene poly(ionic liquid) networks. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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Huang S, Qi X, Liu T, Wang K, Zhang W, Li J, Zhang Q. Towards Safer Rocket Fuels: Hypergolic Imidazolylidene-Borane Compounds as Replacements for Hydrazine Derivatives. Chemistry 2016; 22:10187-93. [DOI: 10.1002/chem.201601343] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Shi Huang
- Research Center of Energetic Material Genome Science; Institute of Chemical Materials; China Academy of Engineering Physics (CAEP); Mianyang 621900 China
| | - Xiujuan Qi
- School of Material Science and Engineering; Southwest University of Science and Technology; Mianyang, 621900 China
| | - Tianlin Liu
- Research Center of Energetic Material Genome Science; Institute of Chemical Materials; China Academy of Engineering Physics (CAEP); Mianyang 621900 China
| | - Kangcai Wang
- Research Center of Energetic Material Genome Science; Institute of Chemical Materials; China Academy of Engineering Physics (CAEP); Mianyang 621900 China
| | - Wenquan Zhang
- Research Center of Energetic Material Genome Science; Institute of Chemical Materials; China Academy of Engineering Physics (CAEP); Mianyang 621900 China
| | - Jianlin Li
- State Key Laboratory of Multiphase Flows in Power Engineering; Xi'an Jiaotong University; Xi'an, 710049 China
| | - Qinghua Zhang
- Research Center of Energetic Material Genome Science; Institute of Chemical Materials; China Academy of Engineering Physics (CAEP); Mianyang 621900 China
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20
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Liu T, Chen LY, Sun Z. Asymmetric Reduction of tert-Butanesulfinyl Ketimines by N-Heterocyclic Carbene Boranes. J Org Chem 2015; 80:11441-6. [DOI: 10.1021/acs.joc.5b02084] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tao Liu
- College of Chemistry and
Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, China
| | - Ling-yan Chen
- College of Chemistry and
Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, China
| | - Zhihua Sun
- College of Chemistry and
Chemical Engineering, Shanghai University of Engineering Science, 333 Longteng Road, Shanghai, China
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21
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Nerkar S, Curran DP. Synthesis and Suzuki Reactions of N-Heterocyclic Carbene Difluoro(aryl)-boranes. Org Lett 2015; 17:3394-7. [PMID: 26147155 DOI: 10.1021/acs.orglett.5b01101] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Readily available NHC-arylboranes (NHC-BH2Ar) are converted in high yield to stable NHC-difluoro(aryl)boranes (NHC-BF2Ar) by treatment with 2 equiv of 1-chloromethyl-4-fluoro-1,4-diazonia-bicyclo[2.2.2]octane bis(tetrafluoroborate) (Selectfluor). In turn, the NHC-difluoro(aryl)boranes participate directly in Suzuki reactions under conditions previously used for anionic trifluoroborate salts. Accordingly, NHC-difluoroboranes are a new class of stable precursors for Suzuki reactions.
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Affiliation(s)
- Swapnil Nerkar
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Dennis P Curran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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22
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Johnson HC, Torry-Harris R, Ortega L, Theron R, McIndoe JS, Weller AS. Exploring the mechanism of the hydroboration of alkenes by amine–boranes catalysed by [Rh(xantphos)]+. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00597j] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The [Rh(xantphos)]+ fragment acts as an effective catalyst for the hydroboration of the alkene TBE (tert-butyl ethene) using the amine–borane H3B·NMe3 at low (0.5 mol%) catalyst loadings to give the linear product.
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Affiliation(s)
| | | | - Laura Ortega
- Visiting Student from Departamento de Química Inorgańica
- Instituto de Investigaciones Químicas (IIQ)
- Universidad de Sevilla
- Consejo Superior de Investigaciones Científicas
- 41092 Sevilla, Spain
| | - Robin Theron
- Department of Chemistry
- University of Victoria
- Victoria, Canada
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23
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Boussonnière A, Pan X, Geib SJ, Curran DP. Borenium-Catalyzed Hydroborations of Silyl-Substituted Alkenes and Alkynes with a Readily Available N-Heterocyclic Carbene–Borane. Organometallics 2013. [DOI: 10.1021/om400932g] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Anne Boussonnière
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Xiangcheng Pan
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Steven J. Geib
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Dennis P. Curran
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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24
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Cheng QQ, Zhu SF, Zhang YZ, Xie XL, Zhou QL. Copper-catalyzed B-H bond insertion reaction: a highly efficient and enantioselective C-B bond-forming reaction with amine-borane and phosphine-borane adducts. J Am Chem Soc 2013; 135:14094-7. [PMID: 24025045 DOI: 10.1021/ja408306a] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A copper-catalyzed B-H bond insertion reaction with amine- and phosphine-borane adducts was realized with high yield and enantioselectivity under mild reaction conditions. The B-H bond insertion reaction provides a new C-B bond-forming methodology and an efficient approach to chiral organoboron compounds.
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Affiliation(s)
- Qing-Qing Cheng
- State Key Laboratory and Institute of Elemento-organic Chemistry, Nankai University , Tianjin 300071, China
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25
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Pan X, Boussonnière A, Curran DP. Molecular Iodine Initiates Hydroborations of Alkenes with N-Heterocyclic Carbene Boranes. J Am Chem Soc 2013; 135:14433-7. [DOI: 10.1021/ja407678e] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Xiangcheng Pan
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Anne Boussonnière
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Dennis P. Curran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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26
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Li X, Curran DP. Insertion of reactive rhodium carbenes into boron-hydrogen bonds of stable N-heterocyclic carbene boranes. J Am Chem Soc 2013; 135:12076-81. [PMID: 23865527 DOI: 10.1021/ja4056245] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Readily available rhodium(II) salts catalyze reactions between NHC-boranes (NHC-BH3) and diazocarbonyl compounds (N2CRCOR'). Stable α-NHC-boryl carbonyl compounds (NHC-BH2-CHRCOR') are isolated in good yields. The reaction is a reliable way to make boron-carbon bonds with good tolerance for variation in both the NHC-borane and diazocarbonyl components. It presumably occurs by insertion of a transient rhodium carbene into a boron-hydrogen bond of the NHC-borane. Competitive experiments show that a typical NHC-borane is highly reactive toward rhodium carbenes.
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Affiliation(s)
- Xiben Li
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
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