Theatrical Experience Questionnaire

Boerner, Sabine; Jobst, Johanna; Wiemann, Meike

doi:10.1037/t03516-000

Cited by 2 publications

(2 citation statements)

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“…Although, the steric hindrance of HMDS and poor silylating strength appeals to use catalysts and harsher reaction conditions [27][28][29]. Since then, a large number of catalysts have been reported, such as sulfonic acids [30], montmorillonite K-10 [31], ZnCl 2 [32], metal chlorides [33], iodine [34], H 3 PW 12 O 40 [35], TiO 2 -HClO 4 [36], ZrO(OTf) 2 [37], TiCl 3 (OTf) [38], alumina-supported heteropolyoxometalates [39], InBr 3 [40], 1,3-disulfonic acid imidazolium hydrogen sulfate [41], ZrCl 4 [42], {Al(OH)(BDC)} [43], CeO 2 [44] TMSOTf [45], and CH 3 CN for per-O-trimethylsilylation [46], chlorozincate (II) ionic liquid [47], and silica-supported ionic liquid [48]. However, the existing reported methodologies have various limitations, such as expensive catalysts, reactions proceeding at high temperatures, and toxic metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

Mild and Efficient Tunable Brønsted Acidic Ionic Liquid Catalyzed O-Acetylation and O-Trimethylsilylation with Trimethylsilyl Acetate (TMSOAc) and Hexamethyldisilazane (HMDS)

et al. 2021

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This report discloses a mild and efficient O-acetylation using easily accessible TMSOAc as a novel acetyl reagent and O-trimethylsilylation using HMDS for various alcohols catalyzed by tunable Brønsted acidic ionic liquids (TBAILs). Imidazolium-based TBAILs were prepared by a two-step atom-economic reaction and acidities measured by using UV-visible spectroscopy. Both protections for alcohols were accomplished at room temperature with good to excellent yields, while the products and TBAILs were separated by simple work-up for O-silylation and column chromatography for O-acetylation. Notably, with the simple post-process, TBAILs catalyst in this solvent free method easily recovered and recycled several times without significant degradation.

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Section: Introductionmentioning

confidence: 99%

Mild and Efficient Tunable Brønsted Acidic Ionic Liquid Catalyzed O-Acetylation and O-Trimethylsilylation with Trimethylsilyl Acetate (TMSOAc) and Hexamethyldisilazane (HMDS)

et al. 2021

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“…A variety of catalysts have been reported to activate HDMS for the introduction of Si-protecting group into OH compounds [10]. These include sulfonic acids [11] and sulfates [12], zirconium sulfophenyl phosphonate [13], lithium perchlorate [4], H-bzeolite [14], triflates [15] [16], and silica-supported perchloric acid [10].…”

mentioning

confidence: 99%

Efficient Room‐Temperature O‐Silylation of Alcohols Using a SBA‐15‐Supported Cobalt(II) Nanocatalyst

Rajabi

Luque

Serrano‐Ruiz

2012

Chemistry & Biodiversity

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The O-silylation of OH groups of alcohols and phenols with hexamethyldisilazane (HMDS) was achieved in high-to-excellent yields using catalytic quantities of a SBA-15-supported cobalt(II) nanocatalyst (typically 0.5 mol-%) at room temperature and under solvent-free conditions. Furthermore, the heterogeneous catalyst showed an excellent durability and can be conveniently reused by filtration for at least twelve times without any noticeable loss of activity.

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Theatrical Experience Questionnaire

Cited by 2 publications

References 0 publications

Mild and Efficient Tunable Brønsted Acidic Ionic Liquid Catalyzed O-Acetylation and O-Trimethylsilylation with Trimethylsilyl Acetate (TMSOAc) and Hexamethyldisilazane (HMDS)

Mild and Efficient Tunable Brønsted Acidic Ionic Liquid Catalyzed O-Acetylation and O-Trimethylsilylation with Trimethylsilyl Acetate (TMSOAc) and Hexamethyldisilazane (HMDS)

Efficient Room‐Temperature O‐Silylation of Alcohols Using a SBA‐15‐Supported Cobalt(II) Nanocatalyst

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