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22580-55-8 - 2-Pyrrolidinone hydrotribromide, 97% - PHT - Pyrrolidone hydrotribromide - L00177 - Alfa Aesar

L00177 2-Pyrrolidinone hydrotribromide, 97%

CAS Number
Pyrrolidone hydrotribromide

Size Price ($) Quantity Availability
25g 21.60
100g 51.20
500g 136.00
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2-Pyrrolidinone hydrotribromide, 97%


Chemical Properties

Formula Weight
Melting point
Moisture Sensitive
Very sol in alcohol, ether, benzene, chloroform, carbon disulfide. Infinitely soluble in water.


Mild, highly selective brominating agent. Ketones can be ?-brominated in the presence of a double bond: the low concentration of enol form consumes the bromine as it is slowly liberated


Moisture sensitive. Store away from water/moisture and oxidizing agents. Keep the container tightly closed and place it in a cool, dry and well ventilated condition. Store under inert gas.

Literature References

Benjamin Blank, et al. Synthesis and hypoglycemic activity of some substituted 2-arylthiazolo[3.2-a]pyridinium salts.J. Med. Chem.,1978,21,(5), 489-492.

Robin D. Clark. Synthesis of 4-(4-Alkyl-2-morpholinyl)indoles.J. Heterocycl. Chem.,1983,20,(5), 1393-1395.

Mild, highly selective brominating agent. Ketones can be ɑ-brominated in the presence of a double bond: the low concentration of enol form consumes the bromine as it is slowly liberated: Can. J. Chem., 47, 706 (1969). Acid sensitive substrates can be brominated with PHT with excess pyrrolidinone: Synthesis, 59 (1990). Bromination with PHT is facilitated by the presence of free radicals or trace peroxides (as in THF or dioxane). In DMSO, dehydrobromination may occur: J. Org. Chem., 55, 6161 (1990):

See also (2-Carboxyethyl)­triphenyl­phosphonium tribromide, L00553, for alternative reagent.

GHS Hazard and Precautionary Statements

Hazard Statements: H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements: P261-P280a-P305+P351+P338-P304+P340-P405-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Other References

Harmonized Tariff Code


  • A12253

    Salicylic acid, 99%
  • A15332

    2-Pyrrolidinone, 99%
  • L17117

    Hydrogen fluoride pyridine complex, ca 70% HF
  • 31458

    Dimethylamine, 40% w/w aq. soln.
  • H52731

    cis-4-Amino-N-Boc-L-proline methyl ester hydrochloride, 97%

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