4-Toluenesulfonyl chloride → Methyl 4-(chloromethyl)-5-methylfuran-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

Triethylamine (196 μl, 1.41 mmoles), followed by 4-methyl-benzenesulphonyl chloride (247 mg, 1.293 mmoles) were added to a stirred solution of 4-hydroxymethyl-5-methyl-furan-2-carboxylic acid methyl ester (16) (200 mg, 1.176 mmoles) in dry dichloromethane at 0° C. under an argon atmosphere. The reaction mixture was stirred at 0° C. for 15 minutes, then allowed to warm to room temperature and was stirred for a further 4 hours. The mixture was washed with saturated aqueous sodium bicarbonate (50 ml) and brine (50 ml), and dried (MgSO4). After removal of the solvent, the residue was purified by flash chromatography, using petrol/diethyl ether 19:1 v/v as eluent, to afford compound 159 (75 mg) as a white solid. LC/MS System D; Rt=6.34 mins, m/z (ES+)=189 (M+H for C8H9ClO3).

Provenance & Evidence