ChemicalBook CAS DataBase List 1,6-Dibromopyrene

1,6-Dibromopyrene synthesis

9synthesis methods

Product Name:1,6-Dibromopyrene
CAS Number:27973-29-1
Molecular formula:C16H8Br2
Molecular Weight:360.04

Specifically, pyrene (12.2g, 60 mmol) and 300 ml carbon tetrachloride are placed into a three-necked flask with a dropping funnel. Under room temperature, stirring, and nitrogen protection, bromine (11.5ml, 0.23mol) is dissolved in 50ml carbon tetrachloride, and then the solution is added to the reactor (the molar ratio of pyrene to bromine is 1:3.83). The mixed reaction solution is stirred at room temperature for 59 hours, then filtered, and the crude product is washed three times with 100ml methanol. The crude product is recrystallized with a mixed solvent of 260ml carbon tetrachloride and tetrahydrofuran to obtain 19.77g of pure 1,6-dibromopyrene, with a yield of 90.9% and a purity of 99.8%.

129-00-0 Synthesis

129-00-0
332 suppliers
$9.00/1g

27973-29-1
276 suppliers
$6.00/250mg

38303-35-4 Synthesis

38303-35-4
91 suppliers
$40.00/100mg

Yield:27973-29-1 71.1% ，38303-35-4 20%

Reaction Conditions:

with bromine in chloroform; for 4 h;Inert atmosphere;Reflux;

Steps:

Intermediate 1: Synthesis of 1,6- and 1,8-dibromopyrene

58 g (0.287 mol) of pyrene are initially introduced in 1750 ml of chloroform. A solution of 31 ml (0.609 mol) of Br₂ in 250 ml of chloroform is subsequently added dropwise at RT with exclusion of light. The reaction mixture is heated under reflux for 4 h. After cooling, the precipitated solid is filtered off with suction and washed with ethanol and dried. The solid obtained is recrystallised 3 times from CHCI₃. Yield: 1 ,6- dibromopyrene 73.4 g (0.201 mol), 71.1% of theory, and 1 ,8-dibromopyrene 20.6 g (0.06 mol), 20% of theory.

References:

WO2013/185871,2013,A1 Location in patent:Page/Page column 24

129-00-0 Synthesis

129-00-0
332 suppliers
$9.00/1g

27973-29-1
276 suppliers
$6.00/250mg

References

129-00-0 Synthesis

129-00-0
332 suppliers
$9.00/1g