Reaktion #736187

Reaktionsgleichung

7-methylbenzo[b]thiophene

bromine

→

title compound

Ausbeute 10.0%

3-Bromo-7-methylbenzo[b]thiophene

Ausbeute 10.0%

Lösungsmittel

chloroform

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONAfter one hour the mixture is poured onto water
2. 2
   Sonstigethe organic phase separated
3. 3
   Waschenwashed
4. 4
   Sonstigedried
5. 5
   Einengenconcentrated under vacuum

Vorschrift

25 g of 7-methylbenzo[b]thiophene are dissolved in chloroform and 27 g of bromine added at room temperature with stirring. After one hour the mixture is poured onto water and the organic phase separated, washed, dried and concentrated under vacuum. The title compound (contaminated with ca. 10% of 4-bromo-7-methylbenzo[b]thiophene) is obtained as an oil following vacuum distillation at 92°-98°/2.6 mbar.

Quelle