Thionyl Chloride → 2-Thiophenecarbonyl chloride, 3-(difluoromethoxy)-

Participants

Reaction Conditions

Reaction Steps

At 80° C., a mixture of 4.2 g (0.022 mol) of 3-difluoromethoxy-thiophene-2-carboxylic acid in 45 ml of toluene is admixed with 3.1 g (0.026 mol) of thionyl chloride. After the addition has ended, the reaction mixture is heated to 90° C. and stirred at this temperature for another 2 hours. The reaction mixture is subsequently concentrated under reduced pressure at 60° C. This gives 4.6 (98.3% of theory) of 3-difluoromethoxy-thiophene-2-carbonyl chloride in the form of an oil.

Provenance & Evidence