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39416-48-3 - Pyridine hydrobromide perbromide, tech. 90% - Pyridinium bromide perbromide - Pyridinium tribromide - A15684 - Alfa Aesar

A15684 Pyridine hydrobromide perbromide, tech. 90%

CAS 번호
39416-48-3
동의어
Pyridinium bromide perbromide
Pyridinium tribromide

사이즈 가격 ($) 수량 재고 여부
25g 32.10
100g 84.20
500g 264.00
장바구니에 추가 대량 견적에 추가 항목 보기

Pyridine hydrobromide perbromide, tech. 90%

MDL
MFCD00013223
EINECS
254-446-8

화학적 특성

화학식
C5H5N•HBr3
화학 식량
319.82
융점
128-136°
용해도
Soluble in methanol, acetic acid, ethanol, n-butanol and terahydrofuran. Insoluble in water, carbon tetrachloride, ethyl bromide, benzene, toluene, ligroin, petroleum ether.

용도

Pyridine hydrobromide perbromide is used as a brominating reagent in alfa-bromination and alfa-thiocyanation of ketones, phenols, unsaturated and aromatic ethers. It is used as a raw material in the preparation of beta-adrenergic blocking agents. Furthermore, it is used as an analytical reagent.

참고

Store in cool place. Incompatible with strong oxidizing agents and strong bases.

참조 문헌

Stable, crystalline, readily-handled source of bromine, useful for a wide range of brominations, including ɑ-bromination of ketones: J. Am. Chem. Soc., 70, 417 (1948), and conversion of alkenes to vic-dibromides. See, for example: Org. Synth. Coll., 5, 604 (1973), Note 2. The rate of addition to alkenes increases markedly on increased substitution, so that selective bromination of the more substituted of two double bonds can be achieved: Synthesis, 966 (1979).

In pyridine, cyclopentenones are converted directly to their ɑ-bromo derivatives (addition-elimination): Synth. Commun., 18, 1323 (1988).

Selective monobromination of anilines, predominantly at the para-position, can be effected in THF: Synth. Commun., 23, 855 (1993). In aqueous AcOH, alkyl aryl ethers are p-brominated in high yield: Synth. Commun., 28, 499 (1998), whereas aryl methyl ethers are demethylated on heating in xylene: Indian J. Chem., 33B, 288 (1994). Cleaves thioacetals in the presence of TBAB: J. Org. Chem., 46, 1745 (1981).

Hu, Y.; Ju, L.; Lu, L.; Ma, H.; Yu, X. Stereoselective alpha-indolylation of enals via an organocatalytic formal cross-coupling with indoles. Org. Biomol. Chem. 2015, 13 (33), 8869-8874.

Amaya, T.; Hirao, T. Chemistry of Sumanene. Chem Rec 2015, 15 (1), 310-321.

GHS 해저드 및 주의 설명서

해저드 설명서 (EU): H314-H318

Causes severe skin burns and eye damage. Causes serious eye damage.

주의 설명서: P260u-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501a

Do not breathe dusts or mists. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

기타 참조

Merck
14,7973
바일슈타인
3690144
위험 등급
8
포장 그룹
III
통합 관세 코드
2933.31
TSCA(독성물질규제법)"
Yes

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