ChemicalBook CAS DataBase List 2,8-Dibromodibenzothiophene

2,8-Dibromodibenzothiophene synthesis

4synthesis methods

Product Name:2,8-Dibromodibenzothiophene
CAS Number:31574-87-5
Molecular formula:C12H6Br2S
Molecular Weight:342.05

132-65-0 Synthesis

132-65-0
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$6.00/5g

31574-87-5
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$7.00/250mg

Yield:31574-87-5 89%

Reaction Conditions:

with bromine in chloroform at 20; for 24 h;

Steps:

1 Synthesis of 2,8-Dibromodibenzothiophene
To a slurry of dibenzothiophene (15.0 g; 0.0814 mol) in chloroform (80 ml) was slowly added bromine (10.5 ml; 32.6 g; 0.18 mol) in chloroform (20 ml). The red- brown reaction mixture was stirred at room temperature for 24 h and then solvent removed by distillation at atmospheric pressure. The residue was washed three times with methanol until the filtrate became almost colourless. The off-white solid was dried under vacuum at 75 °C. Yield 20.5 g (74 %). The product was sublimed to give an analytically pure colourless solid, 18.2 g (89 %). M.p 223°C (DSC, onset) and 227°C (DSC, peak) [ Lit., 226 °C, TCI]

References:

POWER OLEDS LIMITED;KATHIRGAMANATHAN, Poopathy WO2017/13420, 2017, A1 Location in patent:Page/Page column 11

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92-85-3 Synthesis