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ChemicalBook CAS DataBase List 2,2',7,7'-Tetrabromo-9,9'-spirobifluorene
128055-74-3

2,2',7,7'-Tetrabromo-9,9'-spirobifluorene synthesis

10synthesis methods
171408-84-7 Synthesis
2,7-Dibromo-9,9'-spiro-bifluorene

171408-84-7
208 suppliers
$8.00/1g

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Yield:128055-74-3 85%

Reaction Conditions:

with bromine in chloroform at 0; for 3 h;

Steps:

1.3

3) Synthesis of a compound 3 The compound 2 (10.6 mmol, 5 g) was dissolved in 150 ml of chloroform and cooled to 0°C, bromine (21.19 mmol, 3.39 g) was slowly dropped thereon, and agitation was conducted for 3 hours. After the reaction, 50 ml of 2 M potassium hydroxide was injected into the reaction vessel to bring about neutralization. The reactants were then washed three times using distilled water. Next, an organic layer was separated and subjected to vacuum distillation, and the resulting solid was recrystallized using a mixed solution of chloroform and ethanol to produce a compound 3 (9.01 mmol, 5.65 g) (Yield 85 %).

References:

EP1777227,2007,A1 Location in patent:Page/Page column 6-7

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