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Sigma-Aldrich

Trimethylsilyl trifluoromethanesulfonate

99%

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Synonym(s):
TMS triflate, TMSOTf, Trifluoromethanesulfonic acid trimethylsilylester
Linear Formula:
CF3SO3Si(CH3)3
CAS Number:
Molecular Weight:
222.26
Beilstein/REAXYS Number:
1868911
EC Number:
MDL number:
UNSPSC Code:
12352103
PubChem Substance ID:
NACRES:
NA.22

Quality Level

assay

99%

form

liquid

refractive index

n20/D 1.36 (lit.)

bp

77 °C/80 mmHg (lit.)

density

1.228 g/mL at 25 °C (lit.)

SMILES string

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

InChI key

FTVLMFQEYACZNP-UHFFFAOYSA-N

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Application

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.

pictograms

FlameCorrosion

signalword

Danger

hcodes

Hazard Classifications

Flam. Liq. 3 - Skin Corr. 1B

supp_hazards

wgk_germany

WGK 3

flash_point_f

77.0 °F

flash_point_c

25 °C

ppe

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


Certificates of Analysis (COA)

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Efficient, trimethylsilyl triflate-mediated conversion of Diels-Alder adducts of 1-methoxy-3-[(trimethylsilyl) oxy]-1, 3-butadiene (Danishefsky's diene) to cyclohexenones.
Vorndam PE
The Journal of Organic Chemistry, 55(11), 3693-3695 (1990)
Novel glycosidation of 4-demethoxyanthracyclinones by the use of trimethylsilyl triflate. Syntheses of optically active 4-demethoxydaunorubicin and 4-demethoxyadriamycin.
Kimura Y, et al.
Bulletin of the Chemical Society of Japan, 59(2), 423-431 (1986)
Journal of the Chemical Society. Chemical Communications, 755-755 (1993)
General ether synthesis under mild acid-free conditions. Trimethylsilyl iodide catalyzed reductive coupling of carbonyl compounds with trialkylsilanes to symmetrical ethers and reductive condensation with alkoxysilanes to unsymmetrical ethers.
Sassaman MB, et al.
The Journal of Organic Chemistry, 52(19), 4314-4319 (1987)
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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