- COMPLEX COMPOUND, AND PRODUCTION METHOD OF SILOXANE
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PROBLEM TO BE SOLVED: To provide a production method of siloxane capable of producing siloxane efficiently; and to provide a compound useful in production of siloxane. SOLUTION: In a method, siloxane is produced efficiently, by progressing a dehydrogenati
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Paragraph 0046; 0047
(2019/07/13)
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- Selective hydrosiloxane synthesis: Via dehydrogenative coupling of silanols with hydrosilanes catalysed by Fe complexes bearing a tetradentate PNNP ligand
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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.
- Takeshita, Tomohiro,Sato, Kazuhiko,Nakajima, Yumiko
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p. 17004 - 17010
(2019/01/03)
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- Aerobic Co or Cu/NHPI-catalyzed oxidation of hydride siloxanes: Synthesis of siloxanols
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A highly efficient preparative method for the synthesis of siloxanols based on aerobic Co(OAc)2 or Cu(OAc)2/NHPI-catalyzed oxidation of hydride siloxanes using "green", commercially available, simple inexpensive reagents and mild reaction conditions has been proposed. This is a general reaction for the synthesis of mono-, oligo- and polymeric siloxanols with various structures (linear, branched and cyclic).
- Arzumanyan, Ashot V.,Goncharova, Irina K.,Novikov, Roman A.,Milenin, Sergey A.,Boldyrev, Konstantin L.,Solyev, Pavel N.,Tkachev, Yaroslav V.,Volodin, Alexander D.,Smol'Yakov, Alexander F.,Korlyukov, Alexander A.,Muzafarov, Aziz M.
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p. 1467 - 1471
(2018/04/12)
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- Highly Selective Synthesis of Hydrosiloxanes by Au-Catalyzed Dehydrogenative Cross-Coupling Reaction of Silanols with Hydrosilanes
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We report a highly selective synthesis of siloxane building blocks containing SiH2 or SiH functionalities. AuCl(PPh3)/PPh3 or AuCl(PPh3)/PnBu3 system catalyzed the reaction of trihydrosilanes with silanols giving SiH2-containing siloxanes exclusively. On the other hand, a highly selective reaction of dihydrosilanes with silanols to afford SiH-containing siloxanes was achieved by simply changing the phosphine ligand to a bidentate one, xantphos. Usefulness of SiH2-containing siloxanes was demonstrated by the synthesis of a trisiloxane, Et3SiOSi(Ph)(H)OSitBuMe2, and a pentasiloxane, Ph2Si(OSiHPhOSiEt3)2, bearing SiH functionalities.
- Satoh, Yasushi,Igarashi, Masayasu,Sato, Kazuhiko,Shimada, Shigeru
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p. 1836 - 1840
(2017/08/14)
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- Method of manufacturing polyimidesiloxane compd. (by machine translation)
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PROBLEM TO BE SOLVED: rhodium, platinum, and palladium complex or the like instead of the catalyst is found, to provide a new method for manufacturing polyimidesiloxane compd. ~~~ a SOLUTION: and in the condensation reaction silanolated hydrosilane, nickel compound represented by the following eq. (C) is used as a catalyst, siloxane compound can be produced. [And 1] ( In the formula, R 3 are each independently a hydrogen atom, or a nitrogen atom, an oxygen atom, a sulfur atom, a silicon atom, phosphorus atom, and a halogen atom is selected from the group consisting of at least 1 may also include a kind of carbon number 1-20 hydrocarbon group. ) Selected drawing: no (by machine translation)
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Paragraph 0027; 0028
(2016/11/17)
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- Substituted lithiumtrimethylsiloxysilanides LiSiRR′(OSiMe3) - Investigations of their synthesis, stability and reactivity
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The reactions of the trimethylsiloxychlorosilanes (Me3SiO)RR′SiCl (1a-h: R′ = Ph, 1a: R = H, 1b: R = Me, 1c: R = Et, 1d: R = iPr, 1e: R = tBu, 1f: R = Ph, 1g: R = 2,4,6-Me3C6H2 (Mes), 1h: R
- Harloff, Joerg,Popowski, Eckhard,Reinke, Helmut
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p. 1421 - 1441
(2007/10/03)
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