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2,4,4,6-Tetrabromo-2,5-cyclohexadienone, 90+% - CAS 20244-61-5 - Formula C6H2Br4O

L00152 20244-61-5 2,4,4,6-Tetrabromo-2,5-cyclohexadienone, 90+% Alfa Aesar


Certificate of Analysis

2,4,4,6-Tetrabromo-2,5-cyclohexadienone, 90+%

CAS: 20244-61-5 MDL: MFCD00001589  EINECS: 243-638-7
Not regulated for shipping


Pricing and Availability

Size ($) Price Your Price Quantity Options Availability
5g 33.30 Check Availability Add to Favorites Enter qty and click checkbox
25g 115.00 Check Availability Add to Favorites Enter qty and click checkbox

Chemical Properties

Formula: C6H2Br4O  Melting point: ca 125° dec.
Formula weight: 409.70  

Literature References

Selectively monobrominates phenols and unprotected arylamines mainly at the para position: J. Chem. Soc. (C), 3652 (1971). For tabulated results for the p-bromination of arylamines, see: Org. Synth. Coll., 6, 181 (1988).

ɑß-Unsaturated methyl ketones are brominated selectively at the methyl group: Tetrahedron, 29, 1625 (1973).

Reacts selectively with the terminal double bonds of polyenes: Chem. Lett., 283 (1976); Tetrahedron Lett., 26, 343 (1985). In aqueous systems, the products are the bromohydrins or, in methanol, their methyl ethers: Synthesis, 605 (1978) and references therein.

For selective monobromination of imidazoles and indoles, see: J. Chem. Soc., Perkin 1, 2567 (1972).

In combination with PPh3, can be used to convert alcohols and THP ethers to bromides with inversion of configuration: Tetrahedron Lett., 38, 1955 (1997). Silyl ethers also behave similarly: Tetrahedron Lett., 38, 7223 (1997).

Versatile catalyst for acetalization and transacetalization of carbonyl compounds, preparation of acetonides from epoxides, and acylals from aldehydes: Bull. Chem. Soc. Jpn., 75, 2195 (2002).

Other References

Beilstein: 2048028
Harmonized Tariff Code: 2934.99

GHS Hazard and Precautionary Statements

Hazard Statements : H315-H319-H335

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

Precautionary Statements : P261-P280-P305+P351+P338-P304+P340-P405-P501A

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/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.

Harmful or Irritant

Risk & Safety

Risk Phrases: 36/37/38
Irritating to eyes, respiratory system and skin.
Safety Phrases: 26-37
In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable gloves.