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1,3-Dimethoxy-1,3-dimethyl-1,3-diphenyl- and 1,3-dimethoxy-1,3-tetraphenyldisiloxanes: synthesis and structure. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2596-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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2
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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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Sugiyama T, Shiba H, Yoshikawa M, Wada H, Shimojima A, Kuroda K. Synthesis of Polycyclic and Cage Siloxanes by Hydrolysis and Intramolecular Condensation of Alkoxysilylated Cyclosiloxanes. Chemistry 2019; 25:2764-2772. [PMID: 30600848 DOI: 10.1002/chem.201805942] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/26/2018] [Indexed: 12/26/2022]
Abstract
The controlled synthesis of oligosiloxanes with well-defined structures is important for the bottom-up design of siloxane-based nanomaterials. This work reports the synthesis of various polycyclic and cage siloxanes by the hydrolysis and intramolecular condensation of monocyclic tetra- and hexasiloxanes functionalized with various alkoxysilyl groups. An investigation of monoalkoxysilylated cyclosiloxanes revealed that intramolecular condensation occurred preferentially between adjacent alkoxysilyl groups to form new tetrasiloxane rings. The study of dialkoxy- and trialkoxysilylated cyclotetrasiloxanes revealed multistep intramolecular condensation reactions to form cubic octasiloxanes in relatively high yields. Unlike conventional methods starting from organosilane monomers, intramolecular condensation enables the introduction of different organic substituents in controlled arrangements. So-called Janus cubes have been successfully obtained, that is, Ph4 R4 Si8 O12 , in which R=Me, OSiMe3 , and OSiMe2 Vi (Vi=vinyl). These findings will enable the creation of siloxane-based materials with diverse functions.
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Affiliation(s)
- Tomoaki Sugiyama
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Hiroya Shiba
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Masashi Yoshikawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Hiroaki Wada
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Atsushi Shimojima
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Kazuyuki Kuroda
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, Okubo-3, Shinjuku-ku, Tokyo, 169-8555, Japan.,Kagami Memorial Research Institute, for Materials Science and Technology, Nishiwaseda-2, Shinjuku-ku, Tokyo, 169-0051, Japan
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4
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Yoshikawa M, Tamura Y, Wakabayashi R, Tamai M, Shimojima A, Kuroda K. Protecting and Leaving Functions of Trimethylsilyl Groups in Trimethylsilylated Silicates for the Synthesis of Alkoxysiloxane Oligomers. Angew Chem Int Ed Engl 2017; 56:13990-13994. [PMID: 28895273 DOI: 10.1002/anie.201705942] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Indexed: 11/10/2022]
Abstract
The concept of protecting groups and leaving groups in organic synthesis was applied to the synthesis of siloxane-based molecules. Alkoxy-functionalized siloxane oligomers composed of SiO4 , RSiO3 , or R2 SiO2 units were chosen as targets (R: functional groups, such as Me and Ph). Herein we describe a novel synthesis of alkoxysiloxane oligomers based on the substitution reaction of trimethylsilyl (TMS) groups with alkoxysilyl groups. Oligosiloxanes possessing TMS groups were reacted with alkoxychlorosilane in the presence of BiCl3 as a catalyst. TMS groups were substituted with alkoxysilyl groups, leading to the synthesis of alkoxysiloxane oligomers. Siloxane oligomers composed of RSiO3 and R2 SiO2 units were synthesized more efficiently than those composed of SiO4 units, suggesting that the steric hindrance around the TMS groups of the oligosiloxanes makes a difference in the degree of substitution. This reaction uses TMS groups as both protecting and leaving groups for SiOH/SiO- groups.
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Affiliation(s)
- Masashi Yoshikawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Yasuhiro Tamura
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Ryutaro Wakabayashi
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan.,Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku-ku, Tokyo, 169-0051, Japan
| | - Misa Tamai
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Atsushi Shimojima
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan
| | - Kazuyuki Kuroda
- Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-ku, Tokyo, 169-8555, Japan.,Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, 2-8-26 Nishiwaseda, Shinjuku-ku, Tokyo, 169-0051, Japan
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5
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Yoshikawa M, Tamura Y, Wakabayashi R, Tamai M, Shimojima A, Kuroda K. Protecting and Leaving Functions of Trimethylsilyl Groups in Trimethylsilylated Silicates for the Synthesis of Alkoxysiloxane Oligomers. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705942] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Masashi Yoshikawa
- Department of Applied Chemistry; Faculty of Science and Engineering; Waseda University; 3-4-1 Ohkubo Shinjuku-ku Tokyo 169-8555 Japan
| | - Yasuhiro Tamura
- Department of Applied Chemistry; Faculty of Science and Engineering; Waseda University; 3-4-1 Ohkubo Shinjuku-ku Tokyo 169-8555 Japan
| | - Ryutaro Wakabayashi
- Department of Applied Chemistry; Faculty of Science and Engineering; Waseda University; 3-4-1 Ohkubo Shinjuku-ku Tokyo 169-8555 Japan
- Kagami Memorial Research Institute for Materials Science and Technology; Waseda University; 2-8-26 Nishiwaseda Shinjuku-ku Tokyo 169-0051 Japan
| | - Misa Tamai
- Department of Applied Chemistry; Faculty of Science and Engineering; Waseda University; 3-4-1 Ohkubo Shinjuku-ku Tokyo 169-8555 Japan
| | - Atsushi Shimojima
- Department of Applied Chemistry; Faculty of Science and Engineering; Waseda University; 3-4-1 Ohkubo Shinjuku-ku Tokyo 169-8555 Japan
| | - Kazuyuki Kuroda
- Department of Applied Chemistry; Faculty of Science and Engineering; Waseda University; 3-4-1 Ohkubo Shinjuku-ku Tokyo 169-8555 Japan
- Kagami Memorial Research Institute for Materials Science and Technology; Waseda University; 2-8-26 Nishiwaseda Shinjuku-ku Tokyo 169-0051 Japan
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7
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Satoh Y, Igarashi M, Sato K, Shimada S. Highly Selective Synthesis of Hydrosiloxanes by Au-Catalyzed Dehydrogenative Cross-Coupling Reaction of Silanols with Hydrosilanes. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03560] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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
| | - Masayasu Igarashi
- Interdisciplinary Research
Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Kazuhiko Sato
- Interdisciplinary Research
Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Shigeru Shimada
- 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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Takahashi S, Kurita Y, Ikeda T, Miyamoto M, Uemiya S, Oumi Y. Synthesis and crystal structures of a novel layered silicate SSA-1 and its microporous derivatives by topotactic transformation. Dalton Trans 2016; 45:16335-16344. [PMID: 27722727 DOI: 10.1039/c6dt02983c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a novel layered silicate SSA-1 (SSA: silicate synthesized with a quaternary amine) was achieved in the SiO2-H2O-TEAOH (TEAOH: tetraethylammonium hydroxide - as an organic structural directing agent) system. The crystal structure of SSA-1 involved two silicate layers composed of bre [10T]-type CBU (Composite Building Unit) and TEAOH in interlayers. The topotactic transformation of SSA-1 by calcination was examined, resulting in a porous material (PML-1: porous material transformed from a layered silicate) with a 108 m2 g-1 BET surface area and 0.035 cm3 g-1 pore volume. PML-1 is a siliceous microporous material with silanols in the framework and possesses unique properties, such as hydrophilicity, in spite of all its silica composition. The most reasonable crystal structure of PML-1 was successfully determined on the basis of the crystal structure of SSA-1 by a combination of manual modelling, PXRD pattern simulation, DFT optimization and Rietveld analysis. Additionally, an interlayer expanded siliceous zeolite SSA-1 (IEZ-SSA-1) was also successfully prepared by silylation using trichloro(methyl)silane under acidic conditions. IEZ-SSA-1 showed hydrophilicity or hydrophobicity properties by changing the functional group of the pillar part in the interlayer. Additionally, IEZ-SSA-1 showed a large gas adsorption property (537 m2 g-1 and 0.21 cm3 g-1).
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Affiliation(s)
- S Takahashi
- Graduate School of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Y Kurita
- Graduate School of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - T Ikeda
- National Institute of Advanced industrial and Technology (AIST) Tohoku, 4-2-1, Nigatake, Miyagino-ku, Sendai, 983-8551, Japan
| | - M Miyamoto
- Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - S Uemiya
- Faculty of Engineering, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
| | - Y Oumi
- Life Science Research Center, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan
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Ciborska A, Conterosito E, Milanesio M, Kazimierczuk K, Rzymowska K, Brzozowski K, Dołęga A. The Syntheses and Crystal Structures of the First Disiloxane-1,3-dithiol and Its Cadmium Complex. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500457] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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