Dibenzothiophene → 2-Bromodibenzothiophene

Beteiligte Stoffe

Reaktionsschritte

Dibenzothiophene (15 g, 79.9 mmol) was dissolved in 1.5 L chloroform. To the solution, bromine (12.76 g, 79.9 mmol) was added dropwise. The reaction mixture was vigorously stirring 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.

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