Lawesson's reagent → Ethyl 3-(3,4-difluorobenzyl)-2-thioxopiperidine-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a mixture of ethyl 3-(3,4-difluorobenzyl)-2-oxopiperidine-3-carboxylate (2.8 g) in toluene (50 ml) was added Lawesson's reagent (2.67 g) at room temperature, and the mixture was stirred at 100° C. overnight. The reaction mixture was diluted with ethyl acetate and saturated aqueous sodium hydrogen carbonate solution, the mixture was washed with saturated brine and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (2.64 g).

Provenance & Evidence