Hydrochloric Acid → HCID 54252801, compound

Participants

Reaction Steps

A mixture of 57 g of 2-tolylglyoxylic acid methyl ester oxime and 80 g of powdered potassium carbonate is mixed into 550 ml of dimethyl sulfoxide for 30 minutes at room temperature and then a solution of 40 g of bromofluoromethane in 30 ml of dimethyl sulfoxide is added dropwise at room temperature. The reaction mixture is stirred for a further 20 hours and then poured into 1200 ml of water, neutralised with 230 ml of hydrochloric acid and extracted four times with 250 ml of ethyl acetate each time. The combined organic phases are washed with 200 ml of saturated sodium chloride solution, dried with sodium sulfate and concentrated by evaporation in vacuo. Purification by flash chromatography (silica gel, ethyl acetate/hexane 1:9) yields 2-tolylglyoxylic acid methyl ester O-fluoromethyloxime in the form of a viscous oil.

Provenance & Evidence