title: 2-Bromothiophene
text: # 2-Bromothiophene
  
  2-Bromothiophene is an organosulfur compound with the formula $C_4H_3BrS.$ It is a colorless liquid. Unlike 3-bromothiophene, the 2-bromo isomer is prepared directly by partial bromination of thiophene. It is a precursor to several drugs, including tipepidine, ticlopidine, and clopidogrel.
  
  ## Safety
  
  The LD50 is low, 200 – 250 mg/kg (oral, rat).
  
  