Dimethyl Sulfoxide → Phthalimide, N-(2-formylethyl)-

Participants

Reaction Conditions

Reaction Steps

The reaction was carried out with oven dried glassware. DMSO (85 μl, 1.1 mmol) was added to oxalyl chloride solution (0.35 ml 2M solution in DCM with 5 ml dry DCM) at −78° C. The reaction mixture was stirred at −78° C. for 10 minutes. 2-(3-Hydroxy-propyl)-isoindole-1,3-dione solution (102 mg, 0.5 mmol, in 2 ml DCM) was added drop wise in 2 minutes. Then triethylamine (0.35 ml, 2.5 mmol) was added drop wise in 2 minutes. The mixture was stirred for additional 30 minutes at −78° C. and was warmed up to room temperature. The reaction mixture was extracted with ethyl acetate. The organic layer was washed with saturated sodium bicarbonate, dried over MgSO4, filtered, and the filtrated was concentrated in vacuo. The crude product was purified by flash chromatography to give 3-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-propionaldehyde.

Provenance & Evidence