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Zhang X, Lu K, Chen X, Su G, Rong X, Ma M. Hydroboration and hydrosilylation of alkenes catalyzed by an unsymmetrical magnesium methyl complex. Org Biomol Chem 2024; 22:5353-5360. [PMID: 38869074 DOI: 10.1039/d4ob00745j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
The hydroboration and hydrosilylation of alkenes catalyzed by the unsymmetrical β-diketiminate magnesium methyl complex [(DippXylNacnac)MgMe (THF)] (1) have been reported. When complex 1 was employed as a highly efficient catalyst in the hydroboration of various alkenes with HBpin, only the anti-Markovnikov hydroboration products were obtained in high yields and with high regioselectivities under mild reaction conditions (60 °C). To our surprise, it showed different regioselectivities in the hydrosilylation of a range of alkenes with PhSiH3. Aromatic alkene substrates afforded the corresponding branched Markovnikov hydrosilylation products in high yields and with high regioselectivities; conversely, aliphatic alkenes produced the linear anti-Markovnikov products in moderate yields. This is completely consistent with the corresponding density functional theory (DFT) calculations. In addition, the practical utility was demonstrated via scale-up reactions of boronate esters and a preliminary plausible mechanism of hydroboration and hydrosilylation have been investigated as well.
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Affiliation(s)
- Xuguang Zhang
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China.
| | - Kai Lu
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China.
| | - Xi Chen
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China.
| | - Guanxin Su
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China.
| | - Xiaofei Rong
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China.
| | - Mengtao Ma
- Department of Chemistry and Material Science, College of Science, Nanjing Forestry University, Nanjing 210037, China.
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2
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Hadlington TJ. An anionic beryllium hydride dimer with an exceedingly short Be⋯Be distance. Dalton Trans 2024; 53:882-886. [PMID: 38168968 DOI: 10.1039/d3dt03976e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Heteroleptic hydride complexes of the group 2 metals have seen considerable attention as Earth-abundant synthetic tools, yet anionic derivatives are exceedingly rare. We described the facile synthesis and in-depth characterisation of an anionic beryllium hydride dimer, featuring a dynamic [Be2H3] cluster at its core with a short Be⋯Be distance. Despite this, there is no formal Be-Be bond in this complex, with only hydride bridging interactions leading to this remarkable structural attribute.
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Affiliation(s)
- Terrance J Hadlington
- Fakultät für Chemie, Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany.
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3
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Li C, Guo Q, Zhu J, Wang Q. Organic supramolecular room-temperature phosphorescence featuring profound dependence on host–guest binding behaviors. RESEARCH ON CHEMICAL INTERMEDIATES 2023. [DOI: 10.1007/s11164-023-05009-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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4
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Li Y, Chen J, Ng JJW, Chiba S. Generation of Allylmagnesium Reagents by Hydromagnesiation of 2-Aryl-1,3-dienes. Angew Chem Int Ed Engl 2023; 62:e202217735. [PMID: 36637448 DOI: 10.1002/anie.202217735] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/13/2023] [Accepted: 01/13/2023] [Indexed: 01/14/2023]
Abstract
A protocol for the generation of allylmagnesium reagents from 2-aryl-1,3-dienes was developed using magnesium hydride (MgH2 ) that is generated in situ by solvothermal treatment of sodium hydride (NaH) and magnesium iodide (MgI2 ) in tetrahydrofuran (THF). Downstream functionalization of the resulting allylmagnesium reagents with carbonyl compounds or alkyl (pseudo)halides delivers branched products having an allylic quaternary carbon center, whereas that with chlorosilanes resulted in formation of linear allylsilanes in regio and stereoselective manners. Further derivatizations of the homoallylic alcohols and allylsilanes were also demonstrated.
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Affiliation(s)
- Yihang Li
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore
| | - Jiahua Chen
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore
| | - Jaslyn Jing Wen Ng
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore
| | - Shunsuke Chiba
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, 637371, Singapore
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5
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Wirtz L, Ghulam KY, Morgenstern B, Schäfer A. Constrained Geometry
ansa
‐Half‐Sandwich Complexes of Magnesium – Versatile
s
‐Block Catalysts. ChemCatChem 2022. [DOI: 10.1002/cctc.202201007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lisa Wirtz
- Faculty of Natural Science and Technology Department of Chemistry Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - Kinza Yasmin Ghulam
- Faculty of Natural Science and Technology Department of Chemistry Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - Bernd Morgenstern
- Faculty of Natural Science and Technology Department of Chemistry Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - André Schäfer
- Faculty of Natural Science and Technology Department of Chemistry Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
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6
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Zhao L, Deng P, Gong X, Kang X, Cheng J. Regioselective C–H Alkylation of Aromatic Ethers with Alkenes by a Half-Sandwich Calcium Catalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lanxiao Zhao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, No. 5625, Renmin Street, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Peng Deng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, No. 5625, Renmin Street, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xun Gong
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, No. 5625, Renmin Street, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Xiaohui Kang
- College of Pharmacy, Dalian Medical University, Dalian 116044, China
| | - Jianhua Cheng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, No. 5625, Renmin Street, Changchun 130022, China
- University of Science and Technology of China, Hefei, Anhui 230026, China
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7
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Gong X, Deng P, Cheng J. Calcium Mediated C—H Silylation of Aromatic Heterocycles with Hydrosilanes. ChemCatChem 2022. [DOI: 10.1002/cctc.202200060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xun Gong
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Polymer Physics and Chemistry CHINA
| | - Peng Deng
- Changchun Institute of Applied Chemistry Chinese Academy of Sciences: Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences State Key Laboratory of Polymer Physics and Chemistry CHINA
| | - Jianhua Cheng
- Changchun Institute of Applied Chemistry State Key Laboratory of Polymer Physics and Chemistry Renmin Street. No. 5625 130022 Changchun CHINA
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