反应详情

1H-Pyrrole-2,5-dione (8.0 g, 82 mmol) in dichloromethane (220 mL) at 0° C. was treated with trifluoroacetic acid (0.93 g, 8.2 mmol) and then treated with N-benzyl-N-(methoxymethyl)-N-[(trimethylsilyl)methyl]amine (26 g, 110 mmol) prepared according to (Organic Synthesis (1988), 67, 133-135) in dichloromethane (15 mL) dropwise over 30 minutes. The mixture was allowed to stir at ambient temperature overnight and then concentrated under reduced pressure. The residue was triturated with ethyl acetate:hexane (3:7, 50 mL), cooled to 0° C., and filtered to provide the title compound as a white solid (5.86 g, 31% yield). MS (DCI/NH3) m/z 231 (M+H)+.

1. customprepared
2. concentrationconcentrated under reduced pressure
3. customThe residue was triturated with ethyl acetate:hexane (3:7, 50 mL)
4. temperaturecooled to 0° C.
5. filtrationfiltered