反应详情

In a 250 mL round bottom flask was mixed at room temperature triphosgene (234 mg, 0.790 mmol) in anhydrous dichloromethane (25 mL). To this solution was added dropwise over 15 minutes, a slurry of tert-butyl 5-aminoisoindoline-2-carboxylate (500 mg, 2.134 mmol) and diisopropylethylamine (0.410 ml, 2.347 mmol) in anhydrous dichloromethane (20 mL). The mixture was stirred overnight at room temperature. A solution of isoindoline (0.242 ml, 2.134 mmol) and diisopropylethylamine (0.410 ml, 2.347 mmol) in anhydrous dichloromethane (20 mL) was added in one portion. The reaction stirred overnight at room temperature. The solvent was removed and the residue was purified by normal phase flash chromatography to provide the title compound.

1. additionTo this solution was added dropwise over 15 minutes
2. stirringThe reaction stirred overnight at room temperature
3. customThe solvent was removed
4. customthe residue was purified by normal phase flash chromatography