274676-43-6Relevant articles and documents
A new, highly selective, free-radical aerobic oxidation of silanes to silanols catalysed by N-hydroxyphthalimide under mild conditions
Minisci, Francesco,Recupero, Francesco,Punta, Carlo,Guidarini, Chiara,Fontana, Francesca,Pedulli, Gian Franco
, p. 1173 - 1175 (2002)
Silanes are oxidised to silanols by molecular oxygen, under N-hydroxyphthalimide and Co(II) catalysis, under very mild conditions and in good yields and selectivily. The reaction proceeds through the superimposition of a redox chain to a free-radical chain reaction.
Metal-free hydrogen evolution cross-coupling enabled by synergistic photoredox and polarity reversal catalysis
Cao, Jilei,Lu, Kanghui,Ma, Lishuang,Yang, Xiaona,Zhou, Rong
supporting information, p. 8988 - 8994 (2021/11/23)
A synergistic combination of photoredox and polarity reversal catalysis enabled a hydrogen evolution cross-coupling of silanes with H2O, alcohols, phenols, and silanols, which afforded the corresponding silanols, monosilyl ethers, and disilyl ethers, respectively, in moderate to excellent yields. The dehydrogenative cross-coupling of Si-H and O-H proceeded smoothly with broad substrate scope and good functional group compatibility in the presence of only an organophotocatalyst 4-CzIPN and a thiol HAT catalyst, without the requirement of any metals, external oxidants and proton reductants, which is distinct from the previously reported photocatalytic hydrogen evolution cross-coupling reactions where a proton reduction cocatalyst such as a cobalt complex is generally required. Mechanistically, a silyl cation intermediate is generated to facilitate the cross-coupling reaction, which therefore represents an unprecedented approach for the generation of silyl cationviavisible-light photoredox catalysis.
Bimetallic Nanoshells as Platforms for Metallo- and Biometallo-Catalytic Applications
Kisukuri, Camila M.,Palmeira, Dayvson J.,Rodrigues, Thenner S.,Camargo, Pedro H.C.,Andrade, Leandro H.
, p. 171 - 179 (2016/01/25)
The use of gold, silver, platinum and palladium for preparation of bimetallic nanoshells (AgAu, AgPt, and AgPdNSs, respectively) and their use for metallo- and bio-metallo catalytic applications have been described. Bimetallic nanoshells (metallo-catalysts) were employed for silane oxidation to silanols and hydrogen (H2) production. Fast and efficient oxidation of several silanes was observed after only 1 h at room temperature, by employing AgPd NSs as catalyst, acetone as solvent, and water as oxidant. Interestingly, bio-metallo-catalysts (NSs-CALB) prepared from lipase attachment to the bimetallic nanoshells, displayed promising bi-catalytic activities (enzymatic: transesterification; metallic: silane oxidation).
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)
Lee, Ting Yan,Dang, Li,Zhou, Zhongyuan,Yeung, Chi Hung,Lin, Zhenyang,Lau, Chak Po
experimental part, p. 5675 - 5684 (2011/03/17)
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.
Supported gold nanoparticle catalyst for the selective oxidation of silanes to silanols in water
Mitsudome, Takato,Noujima, Akifumi,Mizugaki, Tomoo,Jitsukawa, Koichiro,Kaneda, Kiyotomi
supporting information; experimental part, p. 5302 - 5304 (2010/01/31)
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.
NaY zeolite as host for the selective heterogeneous oxidation of silanes and olefins with hydrogen peroxide catalyzed by methyltrioxorhenium
Adam, Waldemar,Saha-Moeller, Chantu R.,Weichold, Oliver
, p. 2897 - 2899 (2007/10/03)
The methyltrioxorhenium(MTO)-catalyzed oxidation of silanes to silanols and the epoxidation of various olefins by aqueous 85% H2O2 proceed in high yields and excellent product selectivities (no disiloxanes, diols) in the presence of the zeolite NaY. The oxidative species is located inside the 12- A supercages. This prevents the bimolecular condensation of the silanol to disiloxane by steric means and the Lewis-acid assisted hydrolysis of the epoxide to the diol.
Influence de la taille du cycle sur la substitution electrophile des cycloalkyltrimethylsilanes. Synthese de cycloalkyldimethylfluorosilanes
Grignon-Dubois, M.,Dunogues, J.,Calas, R.
, p. 291 - 295 (2007/10/02)
Cycloalkyltrimethylsilanes, excepting cyclopropyl-, react with electrophiles by Si - Me bond splitting.Consequently silicon can be functionalized by this route.We also propose a new synthesis of cycloalkyldimethylfluoro(or chloro-)silanes.In the case of five or six member ring derivates, the observed results are interpreted by a mechanism involving initial abstraction of hydride ion from the silicon substrate.
