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CAS RN: 878-23-9 | Product Number: B1036

2-Bromo-1-ethylpyridinium Tetrafluoroborate


Purity: >98.0%(T)(HPLC)
Synonyms:
Documents:
5G
€63.00
1   ≥100 
25G
€203.00
1   ≥60 

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Product Number B1036
Purity / Analysis Method >98.0%(T)(HPLC)
Molecular Formula / Molecular Weight C__7H__9BBrF__4N = 273.86 
Physical State (20 deg.C) Solid
Storage Temperature Room Temperature (Recommended in a cool and dark place, <15°C)
Store Under Inert Gas Store under inert gas
Condition to Avoid Hygroscopic
CAS RN 878-23-9
Reaxys Registry Number 4059265
PubChem Substance ID 87563986
SDBS (AIST Spectral DB) 4975
MDL Number

MFCD00060046

Specifications
Appearance White to Almost white powder to crystal
Purity(HPLC) min. 98.0 area%
Purity(Argentometric Titration) min. 98.0 %
Melting point 103.0 to 106.0 °C
Solubility in Water very faint turbidity
Properties (reference)
Melting Point 103 °C
Solubility in water Soluble
GHS
Pictogram Pictogram Pictogram
Signal Word Danger
Hazard Statements H302 : Harmful if swallowed.
H314 : Causes severe skin burns and eye damage.
Precautionary Statements P260 : Do not breathe dust or mist.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P303 + P361 + P353 : IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water.
P301 + P330 + P331 : IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
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.
Related Laws:
EC Number 212-900-2
Transport Information:
UN Number UN1759
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.

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