ChemicalBook CAS DataBase List Allyl bromide

Allyl bromide synthesis

12synthesis methods

Product Name:Allyl bromide
CAS Number:106-95-6
Molecular formula:C3H5Br
Molecular Weight:120.98

Allyl alcohol was synthesized from glycerol and formic acid under inert atmosphere, hydrolysed with NaOH and fractionally distilled to yield the 73% allyl alcohol water azeotrope. This was then reacted with 48% hydrobromic acid and sulfuric acid and the allyl bromide distilled as per the conventional method. It was then redistilled with 3A molecular sieves drying agent to yield the final product which is stored over additional 3A molecular sieves.

107-11-9
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106-95-6
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Yield:106-95-6 93%

Reaction Conditions:

with para-bromotoluene;oxalic acid at 65; for 1.33333 h;Reflux;Temperature;

Steps:

3 Example 3

Add 5 mol of 4-bromotoluene to the reaction vessel, raise the temperature to 65 ° C, add 7 mol of oxalic acid solution with a mass fraction of 25%, and continue to add 6 mol of acrylamine after the addition. After the addition, reflux for 80 min, 15 kPa decompression Distillation,The fraction at 55 ° C was collected, and the collected distillate was washed with a mass fraction of 35% potassium hydrogencarbonate solution, allowed to stand for stratification, and the oil layer was taken out and washed with a mass fraction of 20% potassium bromide solution, and the mass fraction was 80%. The ethylamine solution was washed, the mass fraction was washed with 90% of the acrylonitrile solution, and the dephosphorus pentoxide dehydrating agent was dehydrated to obtain 562.65 g of the finished 3-bromopropene, and the yield was 93%.

References:

CN108264446,2018,A Location in patent:Paragraph 0011; 0013; 0014; 0015

106-96-7 Synthesis