Pyridine hydrobromide perbromide

• Catalog No.: A15684
• CAS Number: 39416-48-3
• M. F.: C5H6Br3N
• M. W.: 319.81984
• Purity: tech. 90%

SYNONYMS

• Title: 三溴化吡啶鎓
• IUPAC name: dibromane pyridine hydrobromide
• IUPAC Traditional name: Brom pyridine hydrobromide
• Synonyms: Pyridinium tribromide; Pyridinium bromide perbromide

DATABASE IDS

• Beilstein Number: 3690144
• Merck Index: 147973
• CAS Number: 39416-48-3
• MDL Number: MFCD00013223
• EC Number: 254-446-8

PROPERTIES

• Purity: tech. 90%
• Melting Point: 128-136°C
• GHS Hazard statements: H314-H318
• European Hazard Symbols: Corrosive (C)
• GHS Precautionary statements: P260-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501A
• Risk Statements: 34
• Safety Statements: 26-36/37/39-45-60
• TSCA Listed: 是
• Hazard Class: 8
• UN Number: UN3261
• Packing Group: III

REFERENCES

• 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).
• 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).