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HomeProduct name listDI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE)

DI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE)

Synonym(s):Di-tert-butylsilyl ditriflate;DTBS ditriflate;Trifluoromethanesulfonic acid di-tert-butylsilylene ester

  • CAS NO.:85272-31-7
  • Empirical Formula: C10H18F6O6S2Si
  • Molecular Weight: 440.45
  • MDL number: MFCD00010581
  • EINECS: 680-172-7
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-08-12 17:17:06
DI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE) Structural

What is DI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE)?

Chemical properties

Colorless to yellow liquid

Physical properties

bp 73–75°C/0.35 mmHg; d 1.208 g cm?3.

The Uses of DI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE)

Di-t-butylsilyl bis(trifluoromethanesulfonate) is a reagent for the selective protection of polyhydroxy compounds. This reagent reacts with 1,2-, 1,3-, and 1,4-diols under mild conditions to give the corresponding dialkylsilylene derivatives in high yield (0–50°C, 79–96%). Deprotection is conveniently achieved by using aqueous hydrofluoric acid in acetonitrile (eq 1).
Unlike di-t-butyldichlorosilane, this reagent reacts with hindered alcohols. Even pinacol reacts to give the silylene derivative (100°C, 24 h, 70%). Di-t-butylsilylene derivatives of 1,2-diols are more reactive than those of 1,3- and 1,4-diols and undergo rapid hydrolysis (5 min) in THF/H2O at pH 10, while the 1,3- and 1,4- derivatives are unaffected at pH 4–10 (22°C) for several hours. This protecting group is stable under the conditions of PDC oxidation of alcohols (CH2Cl2, 25?C, 27 h) and tosylation of alcohols (pyridine, 25°C, 27 h).
The reagent has seen limited use for the protection of alcohols but has been used to protect nucleosides (eq 2).The procedure consists of sequential addition of the ditriflate and triethylamine to the nucleoside in DMF. The choice of solvent is critical.Di-t-butylsilyl bis(trifluoromethanesulfonate)

The Uses of DI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE)

Protecting group reagent for 1,3-diols used recently in a synthesis of N-homoceramides. Also used for selective α-galactosylation in the synthesis of α-galactosyl ceramides.

Preparation

by the treatment of di-t-butylchlorosilane with trifluoromethanesulfonic acid, followed by distillation (71% yield).

Properties of DI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE)

Boiling point: 73-75 °C/0.35 mmHg (lit.)
Density  1.352 g/mL at 25 °C (lit.)
refractive index  n20/D 1.398(lit.)
Flash point: 195 °F
storage temp.  Inert atmosphere,Room Temperature
solubility  sol most common organic solvents.
form  Oil
color  Clear Pale Yellow
Specific Gravity 1.358
Hydrolytic Sensitivity 8: reacts rapidly with moisture, water, protic solvents
BRN  3569211
Stability: Moisture Sensitive
CAS DataBase Reference 85272-31-7(CAS DataBase Reference)

Safety information for DI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE)

Signal word Danger
Pictogram(s)
ghs
Corrosion
Corrosives
GHS05
GHS Hazard Statements H314:Skin corrosion/irritation
Precautionary Statement Codes P280:Wear protective gloves/protective clothing/eye protection/face protection.
P363:Wash contaminated clothing before reuse.
P301+P330+P331:IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for DI-TERT-BUTYLSILYL BIS(TRIFLUOROMETHANESULFONATE)

InChIKey HUHKPYLEVGCJTG-UHFFFAOYSA-N

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