Dibenzothiophene → 2-Bromodibenzothiophene

Participants

Reaction Steps

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.

Provenance & Evidence