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CAS RN: 866252-52-0 | Product Number: D3883

4,5-Dimethoxy-2-(trimethylsilyl)phenyl Trifluoromethanesulfonate

Purity: >90.0%(GC)
  • Trifluoromethanesulfonic Acid 4,5-Dimethoxy-2-(trimethylsilyl)phenyl Ester
  • 4,5-Dimethoxy-2-(trimethylsilyl)phenyl Triflate
≥20  2   Contact Us
≥20  1   ≥20 
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Product Number D3883
Purity / Analysis Method >90.0%(GC)
Molecular Formula / Molecular Weight C__1__2H__1__7F__3O__5SSi = 358.40  
Physical State (20 deg.C) Liquid
Storage Temperature <0°C
Store Under Inert Gas Store under inert gas
Condition to Avoid Air Sensitive,Heat Sensitive
CAS RN 866252-52-0
Reaxys Registry Number 9714642
PubChem Substance ID 87561645
Appearance White to Yellow to Green clear liquid
Purity(GC) min. 90.0 %
Properties (reference)
Refractive Index 1.47
Pictogram Pictogram
Signal Word Danger
Hazard Statements H314 : Causes severe skin burns and eye damage.
H290 : May be corrosive to metals.
Precautionary Statements P501 : Dispose of contents/ container to an approved waste disposal plant.
P234 : Keep only in original container.
P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P390 : Absorb spillage to prevent material damage.
P303 + P361 + P353 : IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P301 + P330 + P331 : IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P363 : Wash contaminated clothing before reuse.
P304 + P340 + P310 : IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor.
P305 + P351 + P338 + P310 : IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER/doctor.
P406 : Store in corrosive resistant container with a resistant inner liner.
P405 : Store locked up.
Related Laws:
Fire Defense Law Group-4-3-III
Transport Information:
UN Number UN3265
Class 8
Packing Group II
Straightforward Aryne Polymerization: Synthesis of Poly(ortho -arylene)s


Typical Procedure: Dried CsF (302.5 mg, 1.99 mmol), dry THF (12 mL), 4,5-dimethoxy-2-(trimethylsilyl)phenyl trifluoromethanesulfonate (363.5 mg, 1.01 mmol) and 18-crown-6 ether (1.023 mg, 3.87 mmol) are added to a dried Schlenk flask under argon. A solution of CuCN (1 mg, 1.1 mol%) in dry THF (6 mL) is added to this mixture. The mixture is stirred at room temperature for 21.5 h. The reaction is quenched with saturated aqueous NH4Cl and extracted with chloroform. The collected organic layer is washed with water, dried over anhydrous MgSO4 and concentrated under reduced pressure. The residue is purified with preparative HPLC (eluent: CHCl3) to give the corresponding poly(ortho -arylene) as a pale yellow solid in 75% yield (101.9 mg). Gel permeation chromatography (eluent: THF) Mn = 5120 g/mol, Mw = 10520 g/mol, Mw /Mn = 2.05.


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