2-BROMO-1-ETHYLPYRIDINIUM TETRAFLUOROBORATE (BEP)
Bromoethylpyridiniumtetrafluoroborate
CAS: 878-23-9
Molecular Formula: C7H9BBrF4N
2-BROMO-1-ETHYLPYRIDINIUM TETRAFLUOROBORATE (BEP) - Names and Identifiers
| Name | Bromoethylpyridiniumtetrafluoroborate |
| Synonyms | BEP BEPyBr BEP TETRAFLUOROBORATE Bromoethylpyridiniumtetrafluoroborate bromoethylpyridiniumtetrafluoroborate 2-Bromo-1-ethylpyridinium tetrafluoroborate 2-BROMO-1-ETHYLPYRIDINIUM TETRAFLUOROBORATE 2-Bromo-1-ethyl-pyridinium tetrafluoroborate 2-bromo-1-ethylpyridin-1-ium tetrafluoroborate 2-BROMO-1-ETHYLPYRIDINIUM TETRAFLUOROBORATE (BEP) |
| CAS | 878-23-9 |
| EINECS | 212-900-2 |
| InChI | InChI=1/C7H9BrN.BF4/c1-2-9-6-4-3-5-7(9)8;2-1(3,4)5/h3-6H,2H2,1H3;/q+1;-1 |
2-BROMO-1-ETHYLPYRIDINIUM TETRAFLUOROBORATE (BEP) - Physico-chemical Properties
| Molecular Formula | C7H9BBrF4N |
| Molar Mass | 273.86 |
| Melting Point | 103-107 °C |
| Water Solubility | very faint turbidity |
| Appearance | Crystalline Powder |
| Color | White |
| BRN | 4059265 |
| Storage Condition | under inert gas (nitrogen or Argon) at 2-8°C |
| MDL | MFCD00060046 |
| Use | Polypeptide reagents. |
2-BROMO-1-ETHYLPYRIDINIUM TETRAFLUOROBORATE (BEP) - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | 1759 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 9-21 |
| HS Code | 29333990 |
| Hazard Note | Irritant |
| Hazard Class | 8 |
| Packing Group | III |
2-BROMO-1-ETHYLPYRIDINIUM TETRAFLUOROBORATE (BEP) - Reference Information
| preparation | experimental steps: trifluoroacetic acid (9.2 ml, 12.0 mg molecules) is added to a solution (3.00g, 12.0 mg molecules) of N-Boc-N-methyl-L-leucine methyl ester (50 ml) at -20 ℃, the mixture is heated to room temperature and stirred for 2 hours. In the use of CH2Cl2 (2x) to structure and neutralize carefully sat. aq NaHCO3. The water layer was extracted with CH2Cl2 (2x) and the composite organic layer was dried on Na2SO4. After vacuuming the solvent is removed, the free amine is dissolved in dry CH2Cl2 (50 mL), and N-Cbz-(L)-valine (3.32g, 13.2 mmol) and DIEA (4.1 mL, 24.0 mmol) are added. Then, a small amount of BEP (3.61g, 13.2 mmol) was added at room temperature to obtain a yellow solution. Stir overnight, dilute with CH2Cl2, then wash with 1mol /L aq. KHSO4, sataq . NaHCO3 and brine. After drying, the solvent (Na2SO4) was removed, and the residue was purified by column chromatography (silica gel, PE:EtOAc 8:2). Dipeptide 1 (4.08g, 10.4 mmol, 87%) is colorless resin. |
Last Update：2024-04-10 22:29:15
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View History
2-BROMO-1-ETHYLPYRIDINIUM TETRAFLUOROBORATE (BEP)
乙酸,2-氯-2-[2-(4-甲氧基苯基)亚肼基],乙酯
ORYZANOL A (CYCLOARTENYL FERULATE)
FMOC-(R)-2-AMINO-3-(ETHANOLAMINO)PROPANOIC ACID
去甲芬太尼马来酰亚胺
葡萄糖二酸单钾盐
(Di-tert-butylphosphine)trihydroboron
L-PHENYLALNINE-P-NITROANILIDE
2-methyl-1-[(2-methylpropyl)disulfanyl]propane
2-羟基丙基三甲基氯化铵
乙酸,2-氯-2-[2-(4-甲氧基苯基)亚肼基],乙酯
ORYZANOL A (CYCLOARTENYL FERULATE)
FMOC-(R)-2-AMINO-3-(ETHANOLAMINO)PROPANOIC ACID
去甲芬太尼马来酰亚胺
葡萄糖二酸单钾盐
(Di-tert-butylphosphine)trihydroboron
L-PHENYLALNINE-P-NITROANILIDE
2-methyl-1-[(2-methylpropyl)disulfanyl]propane
2-羟基丙基三甲基氯化铵