1,4-DIBROMO-2,3-BUTANEDIONE synthesis
- Product Name:1,4-DIBROMO-2,3-BUTANEDIONE
- CAS Number:6305-43-7
- Molecular formula:C4H4Br2O2
- Molecular Weight:243.88
431-03-8
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6305-43-7
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$39.00/1g
Yield:6305-43-7 90%
Reaction Conditions:
with sodium bromate;hydrogen bromide in chloroform at 25 - 35; for 14.5 h;
Steps:
6 Example 6
In a 500-mL reaction vessel, 8.6 g of 2,3-butanedione, 12.08 g of sodium bromate, and 100 ml of chloroform were slowly added at 25°C.Hydrogen bromide solution 81g (40wt%) was added dropwise. The addition was complete for 2.5 h, slowly warmed to 35°C, and stirred at this temperature for 5h.After standing, GC monitoring, the reaction was complete after 7h, liquid separation, desolvation of organic phase, vacuum distillation of 81°C/5mm fractions to obtain product 1,4-dibromo-2,3-butanedione (yield 90%) ).
References:
CN107641067,2018,A Location in patent:Paragraph 0027
6884-26-0
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6305-43-7
59 suppliers
$39.00/1g