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225649

Sigma-Aldrich

Trimethylsilyl trifluoromethanesulfonate

99%

Sinonimo/i:

TMS triflate, TMSOTf, Trifluoromethanesulfonic acid trimethylsilylester

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About This Item

Formula condensata:
CF3SO3Si(CH3)3
Numero CAS:
27607-77-8
Peso molecolare:
222.26
Beilstein:
1868911
Numero CE:
248-565-4
Numero MDL:
MFCD00000406
Codice UNSPSC:
12352103
ID PubChem:
24853510
NACRES:
NA.22

Livello qualitativo

200

Saggio

99%

Forma fisica

liquid

Indice di rifrazione

n20/D 1.36 (lit.)

P. eboll.

77 °C/80 mmHg (lit.)

Densità

1.228 g/mL at 25 °C (lit.)

Stringa SMILE

C[Si](C)(C)OS(=O)(=O)C(F)(F)F

InChI

1S/C4H9F3O3SSi/c1-12(2,3)10-11(8,9)4(5,6)7/h1-3H3
FTVLMFQEYACZNP-UHFFFAOYSA-N

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Applicazioni

Trimethylsilyl trifluoromethanesulfonate has been used in combination with boron trifluoride etherate for the copper-catalyzed asymmetric allylic alkylation (AAA) of allyl bromides, chlorides, and ethers with organolithium reagents in the presence of a chiral ligand.
It can be used:
  • As a silylating agent for the synthesis of trimethylsilyl-enol ethers from esters of α-diazoacetoacetic acid.
  • To activate benzyl and allyl ethers for the alkylation of sulfides.
  • To facilitate the conversion of Diels-Alder adducts of Danishefsky′s diene to cyclohexenones without the formation of methoxy ketone by-product.
  • To prepare difluoroboron triflate etherate, a powerful Lewis acid especially in acetonitrile solvent.
  • As a reagent in a Dieckmann-like cyclization of ester-imides and diesters.

It may also be used to catalyze:
  • Acylation of alcohols with acid anhydrides.
  • Reductive coupling of carbonyl compounds with trialkylsilanes to form symmetrical ethers.
  • Glycosidation of 4-demethoxydaunomycinones with 1-O-acyl-L-daunosamine derivatives.

Accessorio

N° Catalogo
Descrizione
Determinazione del prezzo

Pittogrammi

FlameCorrosion
GHS02,GHS05

Avvertenze

Danger

Indicazioni di pericolo

H226,H314

Classi di pericolo

Flam. Liq. 3 - Skin Corr. 1B

Rischi supp

EUH014

Codice della classe di stoccaggio

3 - Flammable liquids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

77.0 °F - closed cup

Punto d’infiammabilità (°C)

25 °C - closed cup

Dispositivi di protezione individuale

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

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Certificati d'analisi (COA)

Lot/Batch Number
MKCM5469
MKCM5773
MKCD9780
MKCC8340
MKCD9101

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A simple method of preparing trimethylsilyl-and tert-butyldimethylsilyl-enol ethers of ?-diazoacetoacetates and their use in the synthesis of a chiral precursor to thienamycin analogs.
Ueda Y, et al.
Canadian Journal of Chemistry, 62(12), 2936-2940 (1984)
Thomas R Hoye et al.
Organic letters, 8(23), 5191-5194 (2006-11-03)
[Structure: see text] Trialkylsilyl triflates effect cyclization of ester-imides such as 2 to produce adducts such as 4a. Trapping of the in situ generated, nucleophilic ketene acetal (cf. 5a) is a key aspect of the transformation. A range of substrates
BF 3? OEt 2 and TMSOTf: A synergistic combination of Lewis acids.
Myers EL, et al.
Chemical Communications (Cambridge, England), 42, 4434-4436 (2006)
Eddie L Myers et al.
Chemical communications (Cambridge, England), (42), 4434-4436 (2006-10-24)
The combination of BF3.OEt2 and TMSOTf gives BF2OTf.OEt2, which is a more powerful Lewis acid than its components and especially effective in CH3CN solvent; the complex formed has been characterised by 1H, 19F, 11B and 31P (using Et3PO as an
Method for sulfide S-benzylation or S-allylation using trimethylsilyl triflate activated benzyl or allyl ethers.
Vedejs E & Eustache J.
The Journal of Organic Chemistry, 46(16), 3353-3354 (1981)
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