反应详情

温度

0 °C

To a stirred solution of acetyl chloride (6.77 ml) in DCM (400 ml) was added tin (IV) chloride (11.14 ml) at -5° C., under nitrogen. 2-(1H-pyrrol-1-yl)-1H-isoindole-1,3(2H)dione (20.0 g) was then added portion-wise, keeping the temperature below 0° C. The reaction mixture was then stirred at 0° C. for 0.5 hour, at which time it was poured into ice water. The layers were separated and the aqueous phase was extracted with DCM. The combined organics were washed twice with 5% HCl (aq.) and dried (MgSO4). Filtration and concentration gave the crude product. Purification via flash column chromatography (silica gel, DCM) afforded 9.62 g of the product as a solid, m.p. 204°-205° C.

1. customthe temperature below 0° C
2. customThe layers were separated
3. extractionthe aqueous phase was extracted with DCM
4. washThe combined organics were washed twice with 5% HCl (aq.)
5. dry with materialdried (MgSO4)
6. filtrationFiltration and concentration
7. customgave the crude product
8. customPurification via flash column chromatography (silica gel, DCM)