- A bentonite-gold nanohybrid as a heterogeneous green catalyst for selective oxidation of silanes
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A highly efficient, environmentally benign and reusable heterogeneous bentonite-gold nanohybrid catalyst was designed and synthesized. This heterogeneous catalyst could efficaciously catalyse the oxidation of organosilanes to silanols. The reaction is 98.7% atom economical and the products were obtained in excellent yield without the formation of disiloxanes as byproducts. The catalyst was also well applicable for the gram scale preparation of silanols.
- Maya,John, Jubi,Varma, R. Luxmi
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- Photocatalyzed cross-dehydrogenative coupling of silanes with alcohols and water
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An efficient method for the dehydrogenative coupling of silanes with alcohols under photocatalysis was developed. The reaction proceeded in the presence of Ru(bpy)3Cl2(0.5 mol%) under visible light irradiation in acetonitrile at room temperature. The developed methodology was also applicable for the synthesis of silanols using water as a coupling partner.
- Lv, Haiping,Laishram, Ronibala Devi,Chen, Jingchao,Khan, Ruhima,Zhu, Yuanbin,Wu, Shiyuan,Zhang, Jianqiang,Liu, Xingyuan,Fan, Baomin
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supporting information
p. 3660 - 3663
(2021/04/16)
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- Selective Manganese-Catalyzed Oxidation of Hydrosilanes to Silanols under Neutral Reaction Conditions
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The first manganese-catalyzed oxidation of organosilanes to silanols with H2O2 under neutral reaction conditions has been accomplished. A variety of organosilanes with alkyl, aryl, alknyl, and heterocyclic substituents were tolerated, as well as sterically hindered organosilanes. The oxidation appears to proceed by a concerted process involving a manganese hydroperoxide species. Featuring mild reaction conditions, fast oxidation, and no waste byproducts, the protocol allows a low-cost, eco-benign synthesis of both silanols and silanediols.
- Wang, Kaikai,Zhou, Jimei,Jiang, Yuting,Zhang, Miaomiao,Wang, Chao,Xue, Dong,Tang, Weijun,Sun, Huamin,Xiao, Jianliang,Li, Chaoqun
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supporting information
p. 6380 - 6384
(2019/05/06)
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- POLYMER WITH ALTERNATING PHENYLENE SILICON AND SILOXANE STRUCTURE AND METHOD OF PRODUCING PRECURSOR OF THE SAME
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A polymer with alternating phenylene silicon and siloxane structure and a method of producing a precursor of the same are introduced to develop an autonomous synthesis process for para-phenylene disilanol monomer compounds and design a technique of purifying the polymer with alternating phenylene silicon and siloxane structure easily, so as to enable mass production of the polymer with alternating phenylene silicon and siloxane structure.
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Paragraph 0042
(2018/08/03)
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- With the turn of the silicon extension phenyl and elongated structure of polymer and its precursor for the preparation method (by machine translation)
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The present invention provides a silicon extension with the turn of phenyl and elongated structure of polymer and its precursor for the preparation method. In this way, development of para-bis-[...] silicon alkanol monomer compound of synthesized process, and further design with the turn of the silicon extension phenyl and elongated framework purification procedure is simple method for manufacturing the same, in order to provide with the turn of the silicon extension phenyl and elongated structure can be in the production of the polymer industry use. (by machine translation)
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Paragraph 0035
(2018/03/31)
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- Catalytic oxidation of silanes by carbon nanotube-gold nanohybrids
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Turning over silanes: The first nanotube-based catalytic system for silane oxidation is reported (see scheme). The reusable gold-nanotube hybrid cleanly oxidizes both alkyl and aryl silanes in high yields, under mild reaction conditions, and compares most favorably to any other catalytic system in terms of overall efficacy and turnover values. Copyright
- John, Jubi,Gravel, Edmond,Hagege, Agnes,Li, Haiyan,Gacoin, Thierry,Doris, Eric
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supporting information; experimental part
p. 7533 - 7536
(2011/10/04)
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- Nonclassical ruthenium silyl dihydride complexes TpRu(PPh 3)(I?·3-HSiR3H) [Tp = hydridotris(pyrazolyl)borate]: Catalytic hydrolytic oxidation of organosilanes to silanols with TpRu(PPh3)(I?·3-HSiR 3H)
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An X-ray crystallographic study showed that it is more appropriate to describe the complexes TpRu(PPh3)"H2SiR 3" as TpRu(PPh3)(I?·3- HSiR3H), a static structure containing HA?·A? ·A?·SiA?·A?·A?·H bonding rather than a highly fluxional pair ofI?-silane hydride species TpRu(PPh3)(Ha)(I?·2-H bSiR3) [rlhar2] TpRu(PPh3)(H b)(I?·2-HaSiR3). One of the complexes was used for the catalytic hydrolytic oxidation of organosilanes to silanols. A mechanism, which does not involve the usual oxidative addition of silane to the metal center to form the silyl hydride species, is proposed, which is supported by theoretical calculations.
- Lee, Ting Yan,Dang, Li,Zhou, Zhongyuan,Yeung, Chi Hung,Lin, Zhenyang,Lau, Chak Po
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experimental part
p. 5675 - 5684
(2011/03/17)
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- A novel method for preparing silanols from silylmethanols
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Various types of silylmethanols were converted into their corresponding silanols in good to excellent yield under mild oxidation conditions using TEMPO (2,2,6,6-tetramethyl-l-piperidinyloxyl). Copyright
- Takeda, Daisuke,Oyama, Ryo,Yamada, Shozo
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supporting information; experimental part
p. 532 - 533
(2011/04/22)
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- Supported gold nanoparticle catalyst for the selective oxidation of silanes to silanols in water
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Hydroxyapatite-supported gold nanoparticles (AuHAP) can act as highly efficient and reusable catalysts for the oxidation of diverse silanes into silanols in water; this is the first catalytic methodology for the selective synthesis of aliphatic silanols using water under organic-solvent-free conditions.
- Mitsudome, Takato,Noujima, Akifumi,Mizugaki, Tomoo,Jitsukawa, Koichiro,Kaneda, Kiyotomi
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supporting information; experimental part
p. 5302 - 5304
(2010/01/31)
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- Supported silver-nanoparticle-catalyzed highly efficient aqueous oxidation of phenylsilanes to silanols
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Bon Apatite! Hydroxyapatite-supported silver nanoparticles act as a highly efficient heterogeneous catalyst for the oxidation of diverse phenylsilanes into silanols in water (see picture; C orange, H red, O blue, R purple, Si green), while suppressing significant condensation to the disiloxanes. The solid silver catalyst is readily reusable without any loss of activity or selectivity. (Figure Presented)
- Mitsudome, Takato,Arita, Shusuke,Mori, Haruhiko,Mizugaki, Tomoo,Jitsukawa, Koichiro,Kaneda, Kiyotomi
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supporting information; experimental part
p. 7938 - 7940
(2009/04/18)
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- Efficient heterogeneous oxidation of organosilanes to silanols catalysed by a hydroxyapatite-bound Ru complex in the presence of water and molecular oxygen
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RuHAP is a highly selective and reusable catalyst for the oxidation of a wide variety of organosilanes to the corresponding silanols in the presence of water and molecular oxygen.
- Mori, Kohsuke,Tano, Makoto,Mizugaki, Tomoo,Ebitani, Kohki,Kaneda, Kiyotomi
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p. 1536 - 1538
(2007/10/03)
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- Oxyfunctionalization reactions by perfluoro cis-2,3-dialkyloxaziridines. Enantioselective conversion of silanes into silanols
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Perfluoro cis-2,3-dialkyloxaziridine 2 is shown to perform the oxyfunctionalization of silanes 1 under very mild conditions to give silanols and silanediols 3 in high chemical yields and complete enantioselectivity.
- Cavicchioli, Marcello,Montanari, Vittorio,Resnati, Giuseppe
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p. 6329 - 6330
(2007/10/02)
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