Reaktion #158252

Reaktionsgleichung

dibenzothiophene

dibenzothiophene

bromine

2,8-dibromodibenzothiophene

sodium sulfite water

→

2-bromodibenzothiophene

Lösungsmittel

chloroform

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe organic phase was evaporated
2. 2
   Sonstigeto give a white solid which
3. 3
   Sonstigeresults
4. 4
   SonstigeThe mixture was repeatedly recrystallized with ethyl acetate

Vorschrift

15 g (79.9 mmol) dibenzothiophene was dissolved in 1.5 L chloroform. To the solution, 12.76 g (79.9 mmol) bromine was added dropwise. The reaction mixture was vigorously stirred for 2 days at room temperature and then treated with sodium sulfite water solution. The organic phase was evaporated to give a white solid which has 48% unreacted dibenzothiophene, 50% 2-bromodibenbzothiophene and ˜less 2% 2,8-dibromodibenzothiophene based on GC-MS and HPLC results. The mixture was repeatedly recrystallized with ethyl acetate to get pure 2-bromodibenzothiophene.

Quelle