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2-Bromo-1-ethylpyridinium Tetrafluoroborate
(CAS RN:878-23-9 Product Number:B1036)

Structure

2-Bromo-1-ethylpyridinium Tetrafluoroborate

General Information

Product Number B1036

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Purity/Analysis Method >98.0%(HPLC)(T)
Storage Temperature
M.F. / M.W. C7H9BBrF4N=273.86
CAS RN 878-23-9
Related CAS RN
MDL Number MFCD00060046
Packaging and Container
  • Product Details
  • Safety & Regulations

Specification

Appearance White to Almost white powder to crystal
Purity(HPLC) min. 98.0 area%
Purity(Argentmetric Titration) min. 98.0 %
Melting point 103.0 to 106.0 deg-C
Solubility in Water very faint turbidity

References

Reaxys-RN 4059265
PubChem SID 87563986
EC Number 212-900-2

GHS

Pictogram
Signal Word Danger
Hazard Statements
  • H302
  • :Harmful if swallowed.
  • H314
  • :Causes severe skin burns and eye damage.
Precautionary Statements
  • P260
  • :Do not breathe dusts or mists.
  • P280
  • :Wear protective gloves, protective clothing, face protection.
  • P301+P330+P331+P310
  • :IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Immediately call a POISON CENTER or doctor.
  • P303+P361+P353+P310+P363
  • :IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower. Immediately call a POISON CENTER or doctor. 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 or 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 or doctor.

Transport Information

UN Number 1759
Class 8
Packing Group III
HS Number 2933399990

Application

Pyridinium Salt Effective for Condensations of N-Methyl Amino Acids

Experimental procedure3): To a solution of N-Boc-N-methyl-L-leucine methyl ester (3.00 g, 12.0 mmol) in CH2Cl2 (50 mL), trifluoroacetic acid (9.2 mL, 120 mmol) is added at -20 °C. The mixture is warmed up to rt and stirred for 2 h. The mixture is diluted with CH2Cl2 and neutralized carefully with sat. aq. NaHCO3. The aqueous layer is extracted with CH2Cl2 (2x) and the combined organic layers are dried over Na2SO4. After removal of the solvent in vacuo, the free amine is dissolved in dry CH2Cl2 (50 mL) and N-Cbz-(L)-valine (3.32 g, 13.2 mmol) and DIEA (4.1 mL, 24.0 mmol) are added. Then, BEP (3.61 g, 13.2 mmol) is added in small portions at rt, what resulted in a yellow colored solution. The mixture is stirred overnight, diluted with CH2Cl2 and washed with 1 mol/L aq. KHSO4, sat. aq. NaHCO3 and brine subsequently. The solvent is removed after drying (Na2SO4) and the residue is purified by column chromatography (silica, PE:EtOAc 8:2). The dipeptide 1 (4.08 g, 10.4 mmol, 87 %) is obtained as a colorless resin.

References

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