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CAS RN: 558-13-4 | 제품번호: T0038

Carbon Tetrabromide


순도/분석 방법: >99.0%(GC)
동의어의:
  • Tetrabromomethane
문서:
25G
₩30,400
≥20  3  
100G
₩88,000
10   문의
500G
₩248,000
5   2  
•본 제품의 재고는 일본 본사의 재고입니다. 주문시, 5일안에 실험실까지 도착됩니다.
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제품번호 T0038
Purity/Analysis Method >99.0%(GC)
M.F. / M.W. CBr__4 = 331.63  
물리적 상태 (20 ℃) Solid
CAS RN 558-13-4
Reaxys-RN 1732799
PubChem Substance ID 87576058
SDBS 3969
MDL 번호

MFCD00000117

규격표
Appearance White powder to crystal
Purity(GC) min. 99.0 %
Melting point 91.0 to 95.0 °C
Solubility in Methanol almost transparency
물성치(참고치)
mp 94 °C
bp 190 °C
Solubility in water Insoluble
Degree of solubility in water 0.24 grm/l   30 °C
GHS
픽토그램 Pictogram Pictogram Pictogram
신호 워드 Danger
위험물 및 유해 등록 H302 : Harmful if swallowed.
H315 : Causes skin irritation.
H318 : Causes serious eye damage.
H371 : May cause damage to organs.
H370 : Causes damage to organs.
H372 : Causes damage to organs through prolonged or repeated exposure.
H373 : May cause damage to organs through prolonged or repeated exposure.
H336 : May cause drowsiness or dizziness.
주의 사항 P501 : Dispose of contents/ container to an approved waste disposal plant.
P260 : Do not breathe dust/ fume/ gas/ mist/ vapors/ spray.
P270 : Do not eat, drink or smoke when using this product.
P271 : Use only outdoors or in a well-ventilated area.
P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ eye protection/ face protection.
P302 + P352 : IF ON SKIN: Wash with plenty of water.
P308 + P311 : IF exposed or concerned: Call a POISON CENTER/doctor.
P362 + P364 : Take off contaminated clothing and wash it before reuse.
P332 + P313 : If skin irritation occurs: Get medical advice/ attention.
P301 + P312 + P330 : IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. Rinse mouth.
P304 + P340 + P312 : IF INHALED: Remove person to fresh air and keep comfortable for breathing. Call a POISON CENTER/doctor if you feel unwell.
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.
P403 + P233 : Store in a well-ventilated place. Keep container tightly closed.
P405 : Store locked up.
법규 정보
RTECS # FG4725000
운송 정보
UN 번호 UN2516
등급 6.1
포장 그룹 III
HS 번호* 2903.39-900
*이 HS 번호 는 TCI(일본)에서 제품을 수출할 때만 사용됩니다
Application
Bromination of Alcohols

T0038

References


Application
Corey-Fuchs Alkyne Synthesis

Typical Procedure:
Carbon tetrabromide (34.67 g, 104.5 mmol) and anhydrous CH2Cl2 (175 mL) are added to a 500 mL round bottom flask equipped with a magnetic stir bar and septum under N2 atmosphere. The reaction flask is cooled to 0 ℃ with an ice bath for 10 min. Triphenylphosphine (54.84 g, 209.1 mmol) is added in portions over 5 min, and the dark red solution is stirred at 0 ℃ for 30 min. 3,4-Dimethoxybenzaldehyde (17.37 g, 104.5 mmol) is added and the mixture is stirred at 0 ℃ for 1 h. A 1 : 1 mixture of H2O : brine is added and the layers are separated. The aqueous layer is extracted with a 1 : 1 mixture of hexanes : CH2Cl2, and the combined organic layers are dried, filtered, and concentrated under reduced pressure. The crude material is chromatographed on SiO2 (0-15% EtOAc/hexanes) to afford the dibromide 1 (29.37 g, Y. 88%) as a yellow oil.
Then, 1 (4.41 g, 13.79 mmol, 1.0 equiv) and THF (45 mL) are added to a 250 mL round bottom flask equipped with a magnetic stir bar and septum, and the reaction flask is cooled to -78 ℃ under N2 atmosphere. 2.5M n-BuLi solution in hexane (11.6 mL) is added slowly via syringe and the reaction solution is stirred at -78 ℃ for 45 min and then at 0 ℃ for 45 min. The flask is recooled to -78 ℃, and freshly distilled methyl chloroformate (1.1 mL, 1.3 mmol, 1.0 equiv) is added slowly via syringe. The mixture is stirred at -78 ℃ for 10 min, then 0 ℃ for 1 h. Saturated aqueous NH4Cl solution is added, and the layers are separated. The aqueous layer is extracted with Et2O, and the combined organic layers are dried, filtered and concentrated under reduced pressure. The residue is chromatographed (SiO2, 2-20% EtOAc / hexanes) to afford the desired alkyne 2 (2.83 g, Y. 93%) as a white solid.

References


PubMed Literature


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