Výsledky vyhledávání - "Silylium ion"

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Ga+-catalyzed hydrosilylation? About the surprising system Ga+/HSiR3/olefin, proof of oxidation with subvalent Ga+ and silylium catalysis with perfluoroalkoxyaluminate anions

Autor: Ingo Krossing, Antoine Barthélemy, Kim Glootz, Harald Scherer, Annaleah Hanske

Publikováno v: Chemical Science. 13:439-453

Already 1 mol-% of subvalent [Ga(PhF)2]+[pf]– ([pf]– = [Al(ORF)4]– , RF = C(CF3)3) initiates the hydrosilylation of olefinic double bonds under mild conditions. Reactions with HSiMe3 and HSiEt3 as substrates efficiently yield anti-Markovnikov a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2bc44aea24587c154c4e5f60fd14e955
https://doi.org/10.1039/d1sc05331k

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Silylium-Ion Regeneration by Protodesilylation Enables Friedel–Crafts Alkylation with Less Isomerization and No Defunctionalization

Autor: Tao He, Martin Oestreich, Hendrik F. T. Klare

Publikováno v: ACS Catalysis. 11:12186-12193

An improved protocol for the Friedel–Crafts alkylation of benzene as well as its methylated and halogenated derivatives with alkyl and benzyl bromides is reported. The reaction is promoted by a cou...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::322e77ff97818d9f70b564ba65d7d3bf
https://doi.org/10.1021/acscatal.1c03602

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B(C6F5)3-Catalyzed Diastereoselective Formal (4 + 1)-Cycloaddition of Vinylcyclopropanes and Et2SiH2

Autor: Martin Oestreich, Peng-Wei Long

Publikováno v: Organic Letters. 23:4834-4837

A formal (4 + 1)-cycloaddition of vinylcyclopropanes and Et2SiH2 to afford 3,4-disubstituted silolanes is reported. The reaction sequence commences with the known B(C6F5)3-catalyzed alkene hydrosilylation with dihydrosilanes. Cleavage of the remainin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4df39ee355aefe5759d31493f7f31d2b
https://doi.org/10.1021/acs.orglett.1c01565

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Silylated Sulfuric Acid: Preparation of a Tris(trimethylsilyl)oxosulfonium [(Me 3 Si−O) 3 SO] + Salt

Autor: René Labbow, Axel Schulz, Alexander Villinger, Kevin Bläsing

Publikováno v: Angewandte Chemie International Edition. 60:13798-13802

The chemistry of silylated sulfuric acid, O2 S(OSiMe3 )2 (T2 SO4 , T=Me3 Si; also known as bis(trimethylsilyl) sulfate), has been studied in detail with the aim of synthesizing the formal autosilylation products of silylated sulfuric acid, [T3 SO4 ]+

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ed2d900d410b298cf3ac1dd12ad0d18a
https://doi.org/10.1002/anie.202104733

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[Mes-B-TMP]+ borinium cation initiated cyanosilylation and catalysed hydrosilylation of ketones and aldehydes

Autor: Ching-Pei Hsu, Yi-Hung Liu, Po-Han Chen, Ching-Wen Chiu, Hsi-Ching Tseng

Publikováno v: Chemical Communications. 57:13732-13735

Two aryl amino borinium cations derived from Cl(Mes)B-NR2 (NR2 = TMP, HMDS) faced divergent outcomes. As the HMDS substituted one underwent methyl migration from silicon to boron transforming the putative borinium ion to a silylium ion, [Mes-B-TMP]+

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4fbe4baa40034066f54464b034c13d97
https://doi.org/10.1039/d1cc06319g

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Mono(hydrosilylation) of N-Heterocycles Catalyzed by B(C6F5)3 and Silylium Ion

Autor: William D. Petrushko, Georgii I. Nikonov

Publikováno v: Organometallics. 39:4717-4722

Catalytic hydrosilylations of various N-heterocycles mediated by silylium ion and electrophilic borane catalysts are reported. The reactions proceed via intermediate silylquinolinium ions that give...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::059220c02ab0ab2aca2603429f9f3095
https://doi.org/10.1021/acs.organomet.0c00697

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Synthesis of a Counteranion‐Stabilized Bis(silylium) Ion

Autor: Avijit Roy, Elisabeth Irran, Martin Oestreich, Guoqiang Wang, Hendrik F. T. Klare, Qian Wu

Publikováno v: Angewandte Chemie (International Ed. in English)

The preparation of a molecule with two alkyl‐tethered silylium‐ion sites from the corresponding bis(hydrosilanes) by two‐fold hydride abstraction is reported. The length of the conformationally flexible alkyl bridge is crucial as otherwise the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::712d9e9b8930d0e15876b392c5f9f992
https://doi.org/10.1002/anie.202003799

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