Bromine → HCID 46220018, compound

Participants

Reaction Steps

At 40° C., 255 mg (1.60 mmol) of bromine are added dropwise to a solution of 0.50 g (1.45 mmol) of 1-methyl-3-nonafluorobutyl-1H-pyrazole-5-carboxylic acid in 3.5 ml of water and the reaction mixture is afterstirred firstly for one hour at 60° C. and then for three days at room temperature. The aqueous phase is extracted three times with dichloromethane and the organic phase is dried over sodium sulphate. The dichloromethane is distilled off at reduced pressure on a rotary evaporator. This gives 0.54 g of 4-bromo-1-methyl-3-nonafluorobutyl-1H-pyrazole-5-carboxylic acid (80%) as an oil.

Provenance & Evidence