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Kuciński K, Stachowiak-Dłużyńska H, Hreczycho G. Catalytic silylation of O–nucleophiles via Si–H or Si–C bond cleavage: A route to silyl ethers, silanols and siloxanes. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214456] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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2
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Nishiyama Y, Xu S, Hanatani Y, Tsuda S, Umeda R. Rhenium complex-catalyzed deoxygenation and silylation of alcohols with hydrosilane. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153839] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Chen JS, Ke YF, Lin HY, Luo SY, Lin W, Yen WC, Wu HR. Development of a Novel Method for Trimethylsilylation of Saccharides. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1705990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractThe trimethylsilyl (TMS) group is widely used in carbohydrate synthesis, although this protecting group is unstable and its post-synthetic purification challenging. The successful trimethylsilylation of carbohydrates mediated by recyclable and efficient acidic catalyst PTA/HMDS and the novel reagent, TMSOAc (TEA/TMSOAc), under alkaline condition is reported. The advantages of these methods are that the reactions proceed in good to excellent yields without applying column chromatography for purification.
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Affiliation(s)
- Jyun-Siao Chen
- Department of Chemistry, National Chung Hsing University
| | - Yi-Fan Ke
- Department of Chemistry, National Chung Hsing University
| | - Heng-Yan Lin
- Department of Chemistry, National Chung Hsing University
| | - Shun-Yuan Luo
- Department of Chemistry, National Chung Hsing University
| | | | | | - Hsin-Ru Wu
- Instrumentation Center, MOST, National Tsing Hua University
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4
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Ashraf MA, Liu Z, Li C, Zhang D. Recent advances in catalytic silylation of hydroxyl‐bearing compounds: A green technique for protection of alcohols using Si–O bond formations. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Muhammad Aqeel Ashraf
- School of Forestry Henan Agricultural University Zhengzhou 450002 China
- School of Environmental Studies China University of Geosciences Wuhan 430074 China
| | - Zhenling Liu
- School of Management Henan University of Technology Zhengzhou 450001 China
| | - Cheng Li
- School of Forestry Henan Agricultural University Zhengzhou 450002 China
| | - Dangquan Zhang
- School of Forestry Henan Agricultural University Zhengzhou 450002 China
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5
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Liang H, Wang LJ, Ji YX, Wang H, Zhang B. Selective Electrochemical Hydrolysis of Hydrosilanes to Silanols via Anodically Generated Silyl Cations. Angew Chem Int Ed Engl 2020; 60:1839-1844. [PMID: 33058450 DOI: 10.1002/anie.202010437] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Indexed: 01/08/2023]
Abstract
The first electrochemical hydrolysis of hydrosilanes to silanols under mild and neutral reaction conditions is reported. The practical protocol employs commercially available and cheap NHPI as a hydrogen-atom transfer (HAT) mediator and operates at room temperature with high selectivity, leading to various valuable silanols in moderate to good yields. Notably, this electrochemical method exhibits a broad substrate scope and high functional-group compatibility, and it is applicable to late-stage functionalization of complex molecules. Preliminary mechanistic studies suggest that the reaction appears to proceed through a nucleophilic substitution reaction of an electrogenerated silyl cation with H2 O.
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Affiliation(s)
- Hao Liang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China
| | - Lu-Jun Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China
| | - Yun-Xing Ji
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China
| | - Han Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China
| | - Bo Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, 210009, China
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6
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Liang H, Wang L, Ji Y, Wang H, Zhang B. Selective Electrochemical Hydrolysis of Hydrosilanes to Silanols via Anodically Generated Silyl Cations. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010437] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hao Liang
- State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing 210009 China
| | - Lu‐Jun Wang
- State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing 210009 China
| | - Yun‐Xing Ji
- State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing 210009 China
| | - Han Wang
- State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing 210009 China
| | - Bo Zhang
- State Key Laboratory of Natural Medicines China Pharmaceutical University Nanjing 210009 China
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Rivero-Crespo M, Oliver-Meseguer J, Kapłońska K, Kuśtrowski P, Pardo E, Cerón-Carrasco JP, Leyva-Pérez A. Cyclic metal(oid) clusters control platinum-catalysed hydrosilylation reactions: from soluble to zeolite and MOF catalysts. Chem Sci 2020; 11:8113-8124. [PMID: 34123084 PMCID: PMC8163423 DOI: 10.1039/d0sc02391d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/05/2020] [Indexed: 12/19/2022] Open
Abstract
The Pt-catalysed addition of silanes to functional groups such as alkenes, alkynes, carbonyls and alcohols, i.e. the hydrosilylation reaction, is a fundamental transformation in industrial and academic chemistry, often claimed as the most important application of Pt catalysts in solution. However, the exact nature of the Pt active species and its mechanism of action is not well understood yet, particularly regarding regioselectivity. Here, experimental and computational studies together with an ad hoc graphical method show that the hydroaddition of alkynes proceeds through Pt-Si-H clusters of 3-5 atoms (metal(oid) association) in parts per million amounts (ppm), which decrease the energy of the transition state and direct the regioselectivity of the reaction. Based on these findings, new extremely-active (ppm) microporous solid catalysts for the hydrosilylation of alkynes, alkenes and alcohols have been developed, paving the way for more environmentally-benign industrial applications.
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Affiliation(s)
- Miguel Rivero-Crespo
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas Avda. de los Naranjos s/n 46022 Valencia Spain +34963877809 +34963877800
| | - Judit Oliver-Meseguer
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas Avda. de los Naranjos s/n 46022 Valencia Spain +34963877809 +34963877800
| | - Klaudia Kapłońska
- Faculty of Chemistry, Jagiellonian University Gronostajowa 2 30-387 Krakow Poland
| | - Piotr Kuśtrowski
- Faculty of Chemistry, Jagiellonian University Gronostajowa 2 30-387 Krakow Poland
| | - Emilio Pardo
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia 46980 Paterna Valencia Spain
| | | | - Antonio Leyva-Pérez
- Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas Avda. de los Naranjos s/n 46022 Valencia Spain +34963877809 +34963877800
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Morris LJ, Hill MS, Mahon MF, Manners I, S McMenamy F, Whittell GR. Heavier Alkaline-Earth Catalyzed Dehydrocoupling of Silanes and Alcohols for the Synthesis of Metallo-Polysilylethers. Chemistry 2020; 26:2954-2966. [PMID: 31899846 DOI: 10.1002/chem.201905313] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Indexed: 11/07/2022]
Abstract
The dehydrocoupling of silanes and alcohols mediated by heavier alkaline-earth catalysts, [Ae{N(SiMe3 )2 }2 ⋅(THF)2 ] (I-III) and [Ae{CH(SiMe3 )2 }2 ⋅(THF)2 ], (IV-VI) (Ae=Ca, Sr, Ba) is described. Primary, secondary, and tertiary alcohols were coupled to phenylsilane or diphenylsilane, whereas tertiary silanes are less tolerant towards bulky substrates. Some control over reaction selectivity towards mono-, di-, or tri-substituted silylether products was achieved through alteration of reaction stoichiometry, conditions, and catalyst. The ferrocenyl silylether, FeCp(C5 H4 SiPh(OBn)2 ) (2), was prepared and fully characterized from the ferrocenylsilane, FeCp(C5 H4 SiPhH2 ) (1), and benzyl alcohol using barium catalysis. Stoichiometric experiments suggested a reaction manifold involving the formation of Ae-alkoxide and hydride species, and a series of dimeric Ae-alkoxides [(Ph3 CO)Ae(μ2 -OCPh3 )Ae(THF)] (3 a-c, Ae=Ca, Sr, Ba) were isolated and fully characterized. Mechanistic experiments suggested a complex reaction mechanism involving dimeric or polynuclear active species, whose kinetics are highly dependent on variables such as the identity and concentration of the precatalyst, silane, and alcohol. Turnover frequencies increase on descending Group 2 of the periodic table, with the barium precatalyst III displaying an apparent first-order dependence in both silane and alcohol, and an optimum catalyst loading of 3 mol % Ba, above which activity decreases. With precatalyst III in THF, ferrocene-containing poly- and oligosilylethers with ferrocene pendent to- (P1-P4) or as a constituent (P5, P6) of the main polymer chain were prepared from 1 or Fe(C5 H4 SiPhH2 )2 (4) with diols 1,4-(HOCH2 )2 -(C6 H4 ) and 1,4-(CH(CH3 )OH)2 -(C6 H4 ), respectively. The resultant materials were characterized by NMR spectroscopy, gel permeation chromatography (GPC) and DOSY NMR spectroscopy, with estimated molecular weights in excess of 20,000 Da for P1 and P4. The iron centers display reversible redox behavior and thermal analysis showed P1 and P5 to be promising precursors to magnetic ceramic materials.
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Affiliation(s)
- Louis J Morris
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.,School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Ian Manners
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.,Department of Chemistry, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Fred S McMenamy
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - George R Whittell
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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Fernandes A, Laye C, Pramanik S, Palmeira D, Pekel ÖÖ, Massip S, Schmidtmann M, Müller T, Robert F, Landais Y. Chiral Memory in Silyl-Pyridinium and Quinolinium Cations. J Am Chem Soc 2019; 142:564-572. [DOI: 10.1021/jacs.9b11704] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | - Claire Laye
- Université Bordeaux, CNRS, ISM, UMR 5255, F-33400, Talence, France
| | - Suman Pramanik
- Université Bordeaux, CNRS, ISM, UMR 5255, F-33400, Talence, France
| | - Dayvson Palmeira
- Université Bordeaux, CNRS, ISM, UMR 5255, F-33400, Talence, France
| | - Özgen Ömür Pekel
- Université Bordeaux, CNRS, ISM, UMR 5255, F-33400, Talence, France
| | - Stéphane Massip
- Université Bordeaux, CNRS, IECB, UMS3033/INSERM US001, F-33607, Pessac, France
| | - Marc Schmidtmann
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, Carl von Ossietzky-Straße 9-11, D-26211 Oldenburg, Germany, European Union
| | - Thomas Müller
- Institute of Chemistry, Carl von Ossietzky University Oldenburg, Carl von Ossietzky-Straße 9-11, D-26211 Oldenburg, Germany, European Union
| | - Frédéric Robert
- Université Bordeaux, CNRS, ISM, UMR 5255, F-33400, Talence, France
| | - Yannick Landais
- Université Bordeaux, CNRS, ISM, UMR 5255, F-33400, Talence, France
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Kuciński K, Hreczycho G. A Highly Effective Route to Si-O-Si Moieties through O-Silylation of Silanols and Polyhedral Oligomeric Silsesquioxane Silanols with Disilazanes. CHEMSUSCHEM 2019; 12:1043-1048. [PMID: 30536641 DOI: 10.1002/cssc.201802757] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Indexed: 06/09/2023]
Abstract
A simple and highly practical catalyst-free O-silylation of silanols with commercially available disilazanes has been developed under mild conditions. In the case of polyhedral oligomeric silsesquioxane (POSS) silanols and some other silanols, it was necessary to use catalytic amounts of inexpensive Bi(OTf)3 as additional catalyst. This efficient chlorine-free protocol involves the synthesis of a wide range of important organosilicon derivatives such as unsymmetrical disiloxanes and functionalized silsesquioxanes.
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Affiliation(s)
- Krzysztof Kuciński
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614, Poznań, Poland
| | - Grzegorz Hreczycho
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614, Poznań, Poland
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11
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Kaźmierczak J, Kuciński K, Lewandowski D, Hreczycho G. Ru-Catalyzed Dehydrogenative Silylation of POSS-Silanols with Hydrosilanes: Its Introduction to One-Pot Synthesis. Inorg Chem 2019; 58:1201-1207. [DOI: 10.1021/acs.inorgchem.8b02645] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Joanna Kaźmierczak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614 Poznań, Poland
| | - Krzysztof Kuciński
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614 Poznań, Poland
| | - Dariusz Lewandowski
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614 Poznań, Poland
| | - Grzegorz Hreczycho
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614 Poznań, Poland
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