Lawesson's reagent → HCID 58826571, compound

Participants

Reaction Steps

To a solution of tert-butyl (S)-[2-(4-benzyloxyphenyl)-1-carbamoylethyl]carbamate (1.53 g, 4.12 mmol) in tetrahydrofuran (15 ml) was added Lawesson reagent (1.70 g, 4.12 mmol), and the mixture was stirred at room temperature for 5 hr. Saturated aqueous sodium hydrogen carbonate solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate. After filtration, the solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (chloroform:ethyl acetate=8:1-5:1). Diisopropy ether was added to the obtained residue. The precipitated solid was collected by filtration and washed with diisopropy ether. The obtained solid was dried in vacuo to give tert-butyl (S)-[2-(4-benzyloxyphenyl)-1-thiocarbamoylethyl]carbamate (540 mg, yield 34%).

Provenance & Evidence