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Liu M, Huang H, An C, Feng X, Wang Z. Facile Synthesis of Ultra-Small Silver Nanoparticles Stabilized on Carbon Nanospheres for the Etherification of Silanes. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1095. [PMID: 38998700 PMCID: PMC11243459 DOI: 10.3390/nano14131095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/22/2024] [Accepted: 06/23/2024] [Indexed: 07/14/2024]
Abstract
The dehydrocoupling reaction between alcohols and hydrosilanes is considered to be one of the most atom-economical ways to produce Si-O coupling compounds because its byproduct is only hydrogen (H2), which make it extremely environmentally friendly. In past decades, various kinds of homogeneous catalysts for the dehydrocoupling of alcohols and hydrosilanes, such as transition metal complexes, alkaline earth metals, alkali metals, and noble metal complexes, have been reported for their good activity and selectivity. Nevertheless, the practical applications of these catalysts still remain unsatisfactory, which is mainly restricted by environmental impact and non-reusability. A facile and recyclable heterogeneous catalyst, ultra-small Ag nanoparticles supported on porous carbon (Ag/C) for the etherification of silanes, has been developed. It has high catalytic activity for the Si-O coupling reaction, and the apparent activation energy of the reaction is about 30 kJ/mol. The ultra-small Ag nanoparticles dispersed in the catalyst through the carrier C have an enrichment effect on all reactants, which makes the reactants reach the adsorption saturation state on the surface of Ag nanoparticles, thus accelerating the coupling reaction process and verifying that the kinetics of the reaction of the catalyst indicate a zero-grade reaction.
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Affiliation(s)
- Minghui Liu
- College of Biomedical and Chemical Engineering, Liaoning Institute of Science and Technology, No. 176 Xianghuai Road, Benxi 117004, China; (C.A.); (X.F.); (Z.W.)
| | - He Huang
- School of Petrochemical Engineering, Liaoning Shihua University, Fushun 113001, China
| | - Changwei An
- College of Biomedical and Chemical Engineering, Liaoning Institute of Science and Technology, No. 176 Xianghuai Road, Benxi 117004, China; (C.A.); (X.F.); (Z.W.)
| | - Xue Feng
- College of Biomedical and Chemical Engineering, Liaoning Institute of Science and Technology, No. 176 Xianghuai Road, Benxi 117004, China; (C.A.); (X.F.); (Z.W.)
| | - Zijing Wang
- College of Biomedical and Chemical Engineering, Liaoning Institute of Science and Technology, No. 176 Xianghuai Road, Benxi 117004, China; (C.A.); (X.F.); (Z.W.)
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2
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Sheng G, Shi Y, Zhang B, Qin J, Zhang B, Jiang X, Gu C, Wu K, Zhang C, Yu J, Li X, Zhang X. Surface Modification of Silicon Nanowires with Siloxane Molecules for High-Performance Hydrovoltaic Devices. ACS APPLIED MATERIALS & INTERFACES 2024; 16:8024-8031. [PMID: 38307833 DOI: 10.1021/acsami.3c15852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2024]
Abstract
Hydrovoltaic devices (HDs) based on silicon nanowires (SiNWs) have attracted significant attention due to their potential of high output power and good compatibility with Si-based photovoltaic devices for integrated power systems. However, it remains a major challenge to further improve the output performance of SiNW HDs for practical applications. Here, a new strategy to modify the surface of SiNWs with siloxane molecules is proposed to improve the output performance of the SiNW HDs. After modification, both the open-circuit voltage (Voc) and short-circuit current density (Jsc) of n-type SiNW HDs can be improved by approximately 30%, while the output power density can be greatly increased by over 200%. With siloxane modification, Si-OH groups on the surface of typical SiNWs are replaced by Si-O-Si chemical bonds that have a weaker electron-withdrawing capability. More free electrons in n-type SiNWs are liberated from surface bound states and participate in directed flow induced by water evaporation, thereby improving the output performance of HDs. The improved performance is significant for system integration applications as it reduces the number of required devices. Three siloxane-modified SiNW HDs in series are able to drive a 2 V light-emitting diode (LED), whereas four unmodified devices in series are initially needed for the same task. This work provides a simple yet effective strategy for surface modification to improve the output performance of SiNW HDs. Further research into the effect of different surface modifications on the performance of SiNW HDs will greatly promote their performance enhancement and practical applications.
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Affiliation(s)
- Guangshang Sheng
- School of Optoelectronic Science and Engineering, Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, P.R. China
| | - Yihao Shi
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Bingchang Zhang
- School of Optoelectronic Science and Engineering, Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, P.R. China
| | - Jiahao Qin
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P.R. China
- Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia
- Suzhou Industrial Park Monash Research Institute of Science and Technology, Monash University, Suzhou 215000, P.R. China
| | - Binbin Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Xingshan Jiang
- School of Optoelectronic Science and Engineering, Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, P.R. China
| | - Chenyang Gu
- School of Optoelectronic Science and Engineering, Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, P.R. China
| | - Kai Wu
- School of Optoelectronic Science and Engineering, Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, P.R. China
| | - Cheng Zhang
- School of Optoelectronic Science and Engineering, Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, P.R. China
| | - Jia Yu
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Xiaofeng Li
- School of Optoelectronic Science and Engineering, Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Laboratory of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, P.R. China
| | - Xiaohong Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P.R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, P.R. China
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3
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Prieto-Pascual U, Rodríguez-Diéguez A, Freixa Z, Huertos MA. Tailor-Made Synthesis of Hydrosilanols, Hydrosiloxanes, and Silanediols Catalyzed by di-Silyl Rhodium(III) and Iridium(III) Complexes. Inorg Chem 2023; 62:3095-3105. [PMID: 36757389 PMCID: PMC10863934 DOI: 10.1021/acs.inorgchem.2c03953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Indexed: 02/10/2023]
Abstract
Siloxanes and silanols containing Si-H units are important building blocks for the synthesis of functionalized siloxane materials, and their synthesis is a current challenge. Herein, we report the selective synthesis of hydrosilanols, hydrosiloxanes, and silanodiols depending on the nature of the catalysts and the silane used. Two neutral ({MCl[SiMe2(o-C6H4PPh2)]2}; M = Rh, Ir) and two cationic ({M[SiMe2(o-C6H4PPh2)]2(NCMe)}[BArF4]; M = Rh, Ir) have been synthesized and their catalytic behavior toward hydrolysis of secondary silanes has been described. Using the iridium complexes as precatalysts and diphenylsilane as a substrate, the product obtained is diphenylsilanediol. When rhodium complexes are used as precatalysts, it is possible to selectively obtain silanediol, hydrosilanol, and hydrosiloxane depending on the catalysts (neutral or cationic) and the silane substituents.
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Affiliation(s)
- Unai Prieto-Pascual
- Facultad
de Química, Universidad del País
Vasco (UPV/EHU), 20018 San Sebastián, Spain
| | | | - Zoraida Freixa
- Facultad
de Química, Universidad del País
Vasco (UPV/EHU), 20018 San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
| | - Miguel A. Huertos
- Facultad
de Química, Universidad del País
Vasco (UPV/EHU), 20018 San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
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4
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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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5
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Wu N, Li C, Dong G, Jiang M, Xu Z. Silver( i)-catalyzed oxidative coupling of hydrosilanes with DMF to symmetrical and unsymmetrical disiloxanes. NEW J CHEM 2022. [DOI: 10.1039/d1nj05617d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An alternative route to symmetrical and unsymmetrical disiloxanes, utilizing a 0.5% AgNTf2 catalyst to enable oxidative coupling of hydrosilanes with DMF as an oxygen source, is reported.
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Affiliation(s)
- Nan Wu
- Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou, 221004, China
| | - Chuang Li
- Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou, 221004, China
| | - Guichao Dong
- Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou, 221004, China
| | - Mengfei Jiang
- Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou, 221004, China
| | - Zhou Xu
- Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Tongshan Road 209, Xuzhou, 221004, China
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6
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Goncharova IK, Ulianova EA, Novikov RA, Volodin AD, Korlyukov AA, Arzumanyan AV. Siloxane-containing derivatives of benzoic acid: chemical transformation of the carboxyl group. NEW J CHEM 2022. [DOI: 10.1039/d2nj03872b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This research presents a scalable method for chemical transformation of Si-containing derivatives of benzoic acid to a wide range of corresponding esters, thioesters, amides, etc. Some of them form HOF-like structures in the crystalline state.
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Affiliation(s)
- Irina K. Goncharova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov St., Moscow 119991, Russian Federation
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Eva A. Ulianova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov St., Moscow 119991, Russian Federation
- HZ University of Applied Sciences, 4382 NW Middelburg, The Netherlands
| | - Roman A. Novikov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
| | - Alexander D. Volodin
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov St., Moscow 119991, Russian Federation
| | - Alexander A. Korlyukov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov St., Moscow 119991, Russian Federation
| | - Ashot V. Arzumanyan
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov St., Moscow 119991, Russian Federation
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991 Moscow, Russian Federation
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7
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Götz T, Falk A, Bauer JO. Molecular Scissors for Tailor-Made Modification of Siloxane Scaffolds. Chemistry 2021; 28:e202103531. [PMID: 34761842 PMCID: PMC9299477 DOI: 10.1002/chem.202103531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Indexed: 01/07/2023]
Abstract
The controlled design of functional oligosiloxanes is an important topic in current research. A consecutive Si−O−Si bond cleavage/formation using siloxanes that are substituted with 1,2‐diaminobenzene derivatives acting as molecular scissors is presented. The method allows to cut at certain positions of a siloxane scaffold forming a cyclic diaminosilane or ‐siloxane intermediate and then to introduce new functional siloxy units. The procedure could be extended to a direct one‐step cleavage of chlorooligosiloxanes. Both siloxane formation and cleavage proceed with good to excellent yields, high regioselectivity, and great variability of the siloxy units. Control of the selectivity is achieved by the choice of the amino substituent. Insight into the mechanism was provided by low temperature NMR studies and the isolation of a lithiated intermediate.
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Affiliation(s)
- Tobias Götz
- Institut für Anorganische Chemie, Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, D-93053, Regensburg, Germany
| | - Alexander Falk
- Institut für Anorganische Chemie, Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, D-93053, Regensburg, Germany
| | - Jonathan O Bauer
- Institut für Anorganische Chemie, Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, D-93053, Regensburg, Germany
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8
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Kawatsu T, Fuchise K, Takeuchi K, Choi JC, Sato K, Matsumoto K. Well-defined hydrogen and organofunctional polysiloxanes with spiro-fused siloxane backbones. Polym Chem 2021. [DOI: 10.1039/d0py01503b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Structurally well-defined macrocyclic polysiloxanes with unique spirosiloxane units and regularly arranged Si–H groups were synthesized by B(C6F5)3-catalyzed dehydrocarbonative cross-couplings.
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Affiliation(s)
- Takahiro Kawatsu
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - Keita Fuchise
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - Katsuhiko Takeuchi
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - Jun-Chul Choi
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - Kazuhiro Matsumoto
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3)
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
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9
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Goncharova IK, Tukhvatshin RS, Kholodkov DN, Novikov RA, Solodilov VI, Arzumanyan AV. Dumbbell-Shaped, Graft and Bottlebrush Polymers with All-Siloxane Nature: Synthetic Methodology, Thermal, and Rheological Behavior. Macromol Rapid Commun 2020; 42:e2000645. [PMID: 33345394 DOI: 10.1002/marc.202000645] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 12/04/2020] [Indexed: 12/14/2022]
Abstract
A methodology for synthesizing a wide range of dumbbell-shaped, graft and bottlebrush polymers with all-siloxane nature (without carbosilane linkers) is suggested. These macroarchitectures are synthesized from SiOH-containing compounds-silanol (Et3 SiOH) and siloxanol dendrons of the first and second generations, with various peripheral substituents (Me or Et)-and from linear siloxanes comprising terminal and internal SiH groups by the Piers-Rubinsztajn reaction. Products and key building blocks are obtained in yields up to 95%. These polymers are heat and frost-resistant siloxanes. As it turns out, the product physical properties are determined not only by the macromolecular structure, the linear chain length, the size and frequency of branched pendant, but also by the type of peripheral substituents-Me or Et-in the pendant. Thus, the viscosity of the graft polymers with branched pendant groups comprising peripheral Me-groups is more than ≈3-5 fold lower than that of analogous polymers with peripheral Et-groups.
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Affiliation(s)
- Irina K Goncharova
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow, 119991, Russian Federation
| | - Rinat S Tukhvatshin
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow, 119991, Russian Federation
| | - Dmitry N Kholodkov
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow, 119991, Russian Federation
| | - Roman A Novikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Pr., Moscow, 119991, Russian Federation
| | - Vitaliy I Solodilov
- Semenov Federal Research Center For Chemical Physics Russian Academy of Sciences, 4 Kosygin Street, Moscow, 119991, Russian Federation
| | - Ashot V Arzumanyan
- Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow, 119991, Russian Federation
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10
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Kawatsu T, Choi JC, Sato K, Matsumoto K. Facile Synthesis of Sequence-Defined Oligo(Dimethylsiloxane-co-Diphenylsiloxane)s. Macromol Rapid Commun 2020; 42:e2000593. [PMID: 33270333 DOI: 10.1002/marc.202000593] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 10/26/2020] [Indexed: 11/07/2022]
Abstract
1,1,3,3,5,5,7,7-Octamethyltetrasiloxane (H MD2 MH ), which is reported to release Me2 SiH2 via a B(C6 F5 )3 -catalyzed redistribution, acts as a good Me2 SiH2 precursor in the B(C6 F5 )3 -catalyzed dehydrocarbonative condensation of alkoxysilanes. A series of oligo(dimethylsiloxane-co-diphenylsiloxane)s that are uniformly sized and sequence-defined at the atomic level are synthesized by a one-pot controlled iteration of a B(C6 F5 )3 -catalyzed dehydrocarbonative condensation of alkoxysilanes with H MD2 MH or Ph2 SiH2 and a B(C6 F5 )3 -catalyzed hydrosilylation of carbonyl compounds, followed by the subsequent B(C6 F5 )3 -catalyzed dehydrogenative condensation of silanols.
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Affiliation(s)
- Takahiro Kawatsu
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Jun-Chul Choi
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Kazuhiko Sato
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Kazuhiro Matsumoto
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
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11
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Lamers BAG, Waal BFM, Meijer EW. The iterative synthesis of discrete dimethylsiloxane oligomers: A practical guide. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200649] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Brigitte A. G. Lamers
- Technische Universiteit Eindhoven, Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry Eindhoven University of Technology Eindhoven The Netherlands
| | - Bas F. M. Waal
- Technische Universiteit Eindhoven, Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry Eindhoven University of Technology Eindhoven The Netherlands
| | - E. W. Meijer
- Technische Universiteit Eindhoven, Institute for Complex Molecular Systems and Laboratory of Macromolecular and Organic Chemistry Eindhoven University of Technology Eindhoven The Netherlands
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12
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Chan JZ, Yesilcimen A, Cao M, Zhang Y, Zhang B, Wasa M. Direct Conversion of N-Alkylamines to N-Propargylamines through C-H Activation Promoted by Lewis Acid/Organocopper Catalysis: Application to Late-Stage Functionalization of Bioactive Molecules. J Am Chem Soc 2020; 142:16493-16505. [PMID: 32830966 PMCID: PMC8048775 DOI: 10.1021/jacs.0c08599] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An efficient catalytic method to convert an α-C-H bond of N-alkylamines into an α-C-alkynyl bond was developed. In the past, such transformations were carried out under oxidative conditions, and the enantioselective variants were confined to tetrahydroisoquinoline derivatives. Here, we disclose a method for the union of N-alkylamines and trimethylsilyl alkynes, without the presence of an external oxidant and promoted through cooperative actions of two Lewis acids, B(C6F5)3 and a Cu-based complex. A variety of propargylamines can be synthesized in high diastereo- and enantioselectivity. The utility of the approach is demonstrated by the late-stage site-selective modification of bioactive amines. Kinetic investigations that shed light on various mechanistic nuances of the catalytic process are presented.
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Affiliation(s)
| | | | - Min Cao
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yuyang Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Bochao Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Masayuki Wasa
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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13
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Satoh Y, Fuchise K, Nozawa T, Sato K, Igarashi M. A catalyst- and additive-free synthesis of alkoxyhydrosiloxanes from silanols and alkoxyhydrosilanes. Chem Commun (Camb) 2020; 56:8218-8221. [PMID: 32555824 DOI: 10.1039/d0cc03379k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A convenient method for the selective synthesis of alkoxyhydrosiloxanes that bear SiH and SiOR2 groups on the same silicon atom, R13Si-O-SiR32-n(OR2)nH (n = 0, 1, or 2), via a simple catalyst- and additive-free dealcoholization reaction between silanols and alkoxyhydrosilanes has been developed. These alkoxyhydrosiloxanes can be easily converted into Si(OR2)3-containing siloxanes by zinc catalyzed alkoxylation and alkoxy-containing silphenylene polymers by platinum catalyzed hydrosilylation.
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Affiliation(s)
- Yasushi Satoh
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
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14
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Kaźmierczak J, Lewandowski D, Hreczycho G. B(C 6F 5) 3-Catalyzed Dehydrocoupling of POSS Silanols with Hydrosilanes: A Metal-Free Strategy for Effecting Functionalization of Silsesquioxanes. Inorg Chem 2020; 59:9206-9214. [PMID: 32510206 DOI: 10.1021/acs.inorgchem.0c01125] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We report a highly effective metal-free catalytic procedure for the functionalization of silsesquioxanes via dehydrocoupling of various POSS silanols with hydrosilanes in the presence of commercially available tris(pentafluorophenyl)borane B(C6F5)3. This approach enables the unprecedented one-pot synthesis of valuable silsesquioxane derivatives under mild conditions, with no corrosive byproducts formed in the process.
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Affiliation(s)
- Joanna Kaźmierczak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Dariusz Lewandowski
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Grzegorz Hreczycho
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
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15
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Kuciński K, Stachowiak H, Hreczycho G. Silylation of Alcohols, Phenols, and Silanols with Alkynylsilanes - an Efficient Route to Silyl Ethers and Unsymmetrical Siloxanes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000573] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Krzysztof Kuciński
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Ul. Uniwersytetu Poznańskiego 8 61-614 Poznań Poland
| | - Hanna Stachowiak
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Ul. Uniwersytetu Poznańskiego 8 61-614 Poznań Poland
| | - Grzegorz Hreczycho
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; Ul. Uniwersytetu Poznańskiego 8 61-614 Poznań Poland
- Center for Advanced Technologies; Adam Mickiewicz University; Ul. Uniwersytetu Poznańskiego 10 61-614 Poznań Poland
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16
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Rocchigiani L, Klooster WT, Coles SJ, Hughes DL, Hrobárik P, Bochmann M. Hydride Transfer to Gold: Yes or No? Exploring the Unexpected Versatility of Au⋅⋅⋅H−M Bonding in Heterobimetallic Dihydrides. Chemistry 2020; 26:8267-8280. [DOI: 10.1002/chem.202000016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Luca Rocchigiani
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
| | - Wim T. Klooster
- National Crystallography ServiceSchool of ChemistryUniversity of Southampton Southampton SO171BJ UK
| | - Simon J. Coles
- National Crystallography ServiceSchool of ChemistryUniversity of Southampton Southampton SO171BJ UK
| | - David L. Hughes
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
| | - Peter Hrobárik
- Department of Inorganic ChemistryFaculty of Natural SciencesComenius University 84215 Bratislava Slovakia
| | - Manfred Bochmann
- School of ChemistryUniversity of East Anglia Norwich Research Park Norwich NR47TJ UK
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17
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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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18
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Kuciński K, Stachowiak H, Hreczycho G. Silylation of silanols with hydrosilanes via main-group catalysis: the synthesis of unsymmetrical siloxanes and hydrosiloxanes. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00904k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Apart from some specific synthetic solutions, a dehydrogenative coupling of silanols with hydrosilanes seems to be the most atom-economical and practical method for the formation of unsymmetrical siloxanes.
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Affiliation(s)
- Krzysztof Kuciński
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
| | - Hanna Stachowiak
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
| | - Grzegorz Hreczycho
- Faculty of Chemistry
- Adam Mickiewicz University in Poznań
- 61-614 Poznań
- Poland
- Center for Advanced Technologies
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19
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Highly effective functionalization of silsesquioxanes mediated by inexpensive earth-abundant metal catalyst – Potassium tert-butoxide. J Catal 2019. [DOI: 10.1016/j.jcat.2019.08.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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20
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Le Coz E, Kahlal S, Saillard J, Roisnel T, Dorcet V, Carpentier J, Sarazin Y. Barium Siloxides and Catalysed Formation of Si−O−Si' Motifs. Chemistry 2019; 25:13509-13513. [DOI: 10.1002/chem.201903676] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Erwann Le Coz
- Univ RennesCNRS, ISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Samia Kahlal
- Univ RennesCNRS, ISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Jean‐Yves Saillard
- Univ RennesCNRS, ISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Thierry Roisnel
- Univ RennesCNRS, ISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | - Vincent Dorcet
- Univ RennesCNRS, ISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
| | | | - Yann Sarazin
- Univ RennesCNRS, ISCR (Institut des Sciences Chimiques de Rennes)UMR 6226 35000 Rennes France
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21
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Pattanaik S, Gunanathan C. Cobalt-Catalyzed Selective Synthesis of Disiloxanes and Hydrodisiloxanes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00305] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Sandip Pattanaik
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar 752050, India
| | - Chidambaram Gunanathan
- School of Chemical Sciences, National Institute of Science Education and Research, HBNI, Bhubaneswar 752050, India
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22
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Kuciński K, Hreczycho G. O-Metalation of silanols and POSS silanols over Amberlyst-15 catalyst: A facile route to unsymmetrical siloxanes, borasiloxanes and germasiloxanes. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.03.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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23
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Zitz R, Baumgartner J, Marschner C. Chemistry of a 1,5-Oligosilanylene Dianion Containing a Disiloxane Unit. Organometallics 2019; 38:1159-1167. [PMID: 30880866 PMCID: PMC6415795 DOI: 10.1021/acs.organomet.9b00013] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Indexed: 11/30/2022]
Abstract
![]()
Synthesis of a number
of disiloxane containing cyclo- and bicyclooligosilanes
is described starting from the dipotassium 1,5-oligosiloxanylene diide
derived from 1,3-bis[tris(trimethylsilyl)silyl]tetramethyldisiloxane.
In addition, the use of this particular fragment as ligand for zinc
and group 4 metallocene complexes was studied. Both types of compounds
exhibit marked structural differences compared to related compounds
containing Si-Si-Si units instead of the Si-O-Si fragment.
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Affiliation(s)
- Rainer Zitz
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Judith Baumgartner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Christoph Marschner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
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24
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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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25
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Rocchigiani L, Budzelaar PHM, Bochmann M. Heterolytic bond activation at gold: evidence for gold(iii) H-B, H-Si complexes, H-H and H-C cleavage. Chem Sci 2019; 10:2633-2642. [PMID: 30996979 PMCID: PMC6425858 DOI: 10.1039/c8sc05229h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Accepted: 01/15/2019] [Indexed: 11/21/2022] Open
Abstract
The coordinatively unsaturated gold(iii) chelate complex [(C^N-CH)Au(C6F5)]+ (1 +) reacts with main group hydrides H-BPin and H-SiEt3 in dichloromethane solution at -70 °C to form the corresponding σ-complexes, which were spectroscopically characterized (C^N-CH = 2-(C6H3Bu t )-6-(C6H4Bu t )pyridine anion; Pin = OCMe2CMe2O). In the presence of an external base such as diethyl ether, heterolytic cleavage of the silane H-Si bond leads to the gold hydrides [{(C^N-CH)AuC6F5}2(μ-H)]+ (2 +) and (C^N-CH)AuH(C6F5) (5), together with spectroscopically detected [Et3Si-OEt2]+. The activation of dihydrogen also involves heterolytic H-H bond cleavage but requires a higher temperature (-20 °C). H2 activation proceeds in two mechanistically distinct steps: the first leading to 2 plus [H(OEt2)2]+, the second to protonation of one of the C^N pyridine ligands and reductive elimination of C6F5H. By comparison, formation of gold hydrides by cleavage of suitably activated C-H bonds is very much more facile; e.g. the reaction of 1·OEt2 with Hantzsch ester is essentially instantaneous and quantitative at -30 °C. This is the first experimental observation of species involved in the initial steps of gold catalyzed hydroboration, hydrosilylation and hydrogenation and the first demonstration of the ability of organic C-H bonds to act as hydride donors towards gold.
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Affiliation(s)
- Luca Rocchigiani
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich NR4 7TJ , UK . ;
| | - Peter H M Budzelaar
- Department of Chemistry , University of Naples Federico II , Via Cintia , 80126 Naples , Italy .
| | - Manfred Bochmann
- School of Chemistry , University of East Anglia , Norwich Research Park , Norwich NR4 7TJ , UK . ;
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26
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Tanaka T, Hasegawa Y, Kawamori T, Kunthom R, Takeda N, Unno M. Synthesis of Double-Decker Silsesquioxanes from Substituted Difluorosilane. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00896] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Toru Tanaka
- Hitachi Chemical Company, Ltd., 48 Wadai, Tsukuba 300-4247, Japan
| | | | - Takashi Kawamori
- Hitachi Chemical Company, Ltd., 48 Wadai, Tsukuba 300-4247, Japan
| | - Rungthip Kunthom
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Nobuhiro Takeda
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
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27
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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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28
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Kaźmierczak J, Hreczycho G. Copper(ii) triflate-mediated synthesis of functionalized silsesquioxanes via dehydrogenative coupling of POSS silanols with hydrosilanes. Dalton Trans 2019; 48:6341-6346. [PMID: 30985836 DOI: 10.1039/c9dt01135h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
In light of the fact that the design of new catalytic routes leading to functionalized silsesquioxanes is currently of high relevance; herein we report a novel, highly effective and convenient catalytic approach for the modification of silsesquioxanes. We present a dehydrogenative coupling reaction of completely as well as incompletely condensed POSS silanols with a wide range of commercially available hydrosilanes mediated by inexpensive copper(ii) trifluoromethanesulfonate. This research also includes mechanistic studies for this process.
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Affiliation(s)
- Joanna Kaźmierczak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614 Poznań, Poland.
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29
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Shankar R, Sharma A, Jangir B, Chaudhary M, Kociok-Köhn G. Catalytic oxidation of diorganosilanes to 1,1,3,3-tetraorganodisiloxanes with gold nanoparticle assembly at the water–chloroform interface. NEW J CHEM 2019. [DOI: 10.1039/c8nj04223c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The synthesis of 1,1,3,3-tetraorganodisiloxanes from the hydrolytic oxidation of diorganosilanes, RR1SiH2, using AuNPs as an interfacial catalyst is described. This study provides a manifestation of the photothermal effect in enhancing the catalytic activity at ambient temperature.
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Affiliation(s)
- Ravi Shankar
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Asmita Sharma
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Bhawana Jangir
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
| | - Manchal Chaudhary
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi-110016
- India
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30
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Takeshita T, Sato K, Nakajima Y. Selective hydrosiloxane synthesis via dehydrogenative coupling of silanols with hydrosilanes catalysed by Fe complexes bearing a tetradentate PNNP ligand. Dalton Trans 2018; 47:17004-17010. [PMID: 30460962 DOI: 10.1039/c8dt04168g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A well-defined iron complex system was established using PNNP-R (R = Ph and Cy) as a strong σ-donating ligand with a rigid meridional tetradentate structure. Reactive Fe(0) complexes [{Fe(PNNP-R)}2(μ-N2)] were synthesized by a reaction of the corresponding iron dihalide with NaBEt3H and structurally characterized. The reaction proceeded via the iron dihydride intermediate [Fe(H)2(PNNP-R)], which underwent H2 reductive elimination, supporting the hemilabile behavior of PNNP-R. [{Fe(PNNP-R)}2(μ-N2)] catalyzed the dehydrogenative coupling of silanols with silanes to selectively form various hydrosiloxanes, which are important building blocks for the synthesis of a range of siloxane compounds. This system exhibited higher catalytic efficiency than the previously reported precious-metal-catalyzed systems.
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Affiliation(s)
- Tomohiro Takeshita
- Interdisciplinary Research Centre for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. and Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Centre for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
| | - Yumiko Nakajima
- Interdisciplinary Research Centre for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan. and Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8571, Japan
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31
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Matsumoto K, Shimada S, Sato K. Sequence-Controlled Catalytic One-Pot Synthesis of Siloxane Oligomers. Chemistry 2018; 25:920-928. [PMID: 30070402 DOI: 10.1002/chem.201803565] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Indexed: 11/07/2022]
Abstract
Silicones are highly valuable poly- and oligomeric materials with a broad range of applications due to their outstanding physicochemical properties. The core framework of silicone materials consists of siloxane (Si-O-Si) bonds, and thus, the development of efficient siloxane-bond-forming reactions has attracted much attention. However, these reactions, especially "catalytic" siloxane-bond-forming reactions that enable the selective formation of unsymmetrical siloxane bonds, remain relatively underdeveloped. On the other hand, controlled iteration has become a powerful tool for the sequence-controlled synthesis of poly- and oligomeric compounds. Recently, control over the siloxane sequence has been achieved by the one-pot iteration of a B(C6 F5 )3 -catalyzed dehydrocarbonative cross-coupling of alkoxysilanes with hydrosilanes and a B(C6 F5 )3 -catalyzed hydrosilylation of carbonyl compounds. Thus, it is now possible to generate linear, branched, and cyclic sequence-specific oligosiloxanes in a highly selective manner under chloride-free conditions.
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Affiliation(s)
- Kazuhiro Matsumoto
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial, Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Shigeru Shimada
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial, Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3), National Institute of Advanced Industrial, Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
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32
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Kaźmierczak J, Hreczycho G. Nafion as effective and selective heterogeneous catalytic system in O-metalation of silanols and POSS silanols. J Catal 2018. [DOI: 10.1016/j.jcat.2018.08.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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33
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Matsumoto K, Oba Y, Nakajima Y, Shimada S, Sato K. One-Pot Sequence-Controlled Synthesis of Oligosiloxanes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kazuhiro Matsumoto
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Yuki Oba
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Yumiko Nakajima
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Shigeru Shimada
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
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34
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Matsumoto K, Oba Y, Nakajima Y, Shimada S, Sato K. One-Pot Sequence-Controlled Synthesis of Oligosiloxanes. Angew Chem Int Ed Engl 2018; 57:4637-4641. [DOI: 10.1002/anie.201801031] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Kazuhiro Matsumoto
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Yuki Oba
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Yumiko Nakajima
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Shigeru Shimada
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry (IRC3); National Institute of Advanced Industrial Science and Technology (AIST); Tsukuba Central 5 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
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Kaźmierczak J, Kuciński K, Stachowiak H, Hreczycho G. Introduction of Boron Functionalities into Silsesquioxanes: Novel Independent Methodologies. Chemistry 2018; 24:2509-2514. [PMID: 29315930 DOI: 10.1002/chem.201705898] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Indexed: 11/06/2022]
Abstract
Owing to their versatile application possibilities, silsesquioxanes (SQs) are of considerable interest for creating hybrid inorganic-organic materials. In this report, two novel and independent strategies for the direct attachment of boron functionalities to silsesquioxanes are presented. Encouraged by our previous work concerning the synthesis of borasiloxanes through the catalyst-free dehydrogenative coupling of silanols and boranes, we decided to apply our method to a synthesis of various boron-functionalized silsesquioxanes. During our tests, we also investigated the activity of scandium(III) triflate, which we have previously used as an excellent catalyst for the obtaining of Si-O-Si and Si-O-Ge moieties. As a result, we also discovered a novel approach for the O-borylation of Si-OH groups in silsesquioxanes with allylborane. Both routes are highly chemoselective and efficiently lead to the obtaining of Si-O-B moiety under air atmosphere and at room temperature.
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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
| | - Hanna Stachowiak
- 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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Yokouchi Y, Ishida S, Onodera T, Oikawa H, Iwamoto T. Facile synthesis and bridgehead-functionalization of bicyclo[3.3.3]pentasiloxanes. Chem Commun (Camb) 2018; 54:268-270. [DOI: 10.1039/c7cc08790j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Various bicyclo[3.3.3]pentasiloxanes (BPSO) were successfully synthesized via regioselective functionalization at the bridgehead positions.
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Affiliation(s)
- Yuki Yokouchi
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Aoba-ku
- Sendai 980-8578
| | - Shintaro Ishida
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Aoba-ku
- Sendai 980-8578
| | - Tsunenobu Onodera
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Aoba-ku
- Sendai 980-8577
- Japan
| | - Hidetoshi Oikawa
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Aoba-ku
- Sendai 980-8577
- Japan
| | - Takeaki Iwamoto
- Department of Chemistry
- Graduate School of Science
- Tohoku University
- Aoba-ku
- Sendai 980-8578
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Tsushima D, Igarashi M, Sato K, Shimada S. Ir-catalyzed Hydrogenolysis Reaction of Silyl Triflates and Halides with H2. CHEM LETT 2017. [DOI: 10.1246/cl.170659] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Daisuke Tsushima
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565
| | - Masayasu Igarashi
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565
| | - Kazuhiko Sato
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565
| | - Shigeru Shimada
- Interdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565
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Kaźmierczak J, Kuciński K, Hreczycho G. Highly Efficient Catalytic Route for the Synthesis of Functionalized Silsesquioxanes. Inorg Chem 2017; 56:9337-9342. [PMID: 28731331 DOI: 10.1021/acs.inorgchem.7b01504] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Silsesquioxanes (POSS) have recently become the subject of growing interest in many branches of materials chemistry. Despite this great interest, no direct metal-catalyzed method to cap the corner of the POSS molecules has yet been proposed. In this report, we present a highly efficient method for the synthesis of functionalized silsesquioxanes mediated by scandium(III) triflate, which opens up the possibility of introducing a wide variety of functional groups into this class of organosilicon compounds under mild conditions with excellent yields. We also investigated the differences in the activity of the Lewis acid (Sc(OTf)3) and the hidden Brønsted acid (TfOH) generated in situ from triflates as catalysts in the functionalization of silsesquioxanes. What is more, this solution provides an efficient corner-capping reaction and other functionalizations to obtain silsesquioxane derivatives which are often not possible to synthesize with good yields, efficiency, and chemoselectivity using conventional methods.
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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
| | - Grzegorz Hreczycho
- Faculty of Chemistry, Adam Mickiewicz University in Poznań , Umultowska 89b, 61-614 Poznań, Poland
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Shankar R, Jangir B, Sharma A. Palladium nanoparticles anchored on polymer vesicles as Pickering interfacial catalysts for hydrolytic oxidation of organosilanes. NEW J CHEM 2017. [DOI: 10.1039/c7nj01314k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly of functional polymer vesicles embedded with PdNPs at water–chloroform interfaces provides a novel catalytic route for the synthesis of poly(hydrosiloxane)s, H2RSi[OSiRH]nOSiRH2.
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Affiliation(s)
- Ravi Shankar
- Department of Chemistry
- Indian Institute of Technology
- New Delhi-110016
- India
| | - Bhawana Jangir
- Department of Chemistry
- Indian Institute of Technology
- New Delhi-110016
- India
| | - Asmita Sharma
- Department of Chemistry
- Indian Institute of Technology
- New Delhi-110016
- India
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