反应详情

To a solution consisting of 2-[2-[(3-methyl-2-thienyl)carbonyl]-1H-pyrrol-1-yl]-1H-isoindole-1,3(2H)dione (11.5 g) in DMF (30 ml) was added 40% methylamine (aq., 34.0 ml) solution at room temperature. The reaction mixture was stirred at ambient temperature for 3.5 hours, then poured into water and ethyl acetate. The layers were separated and the aqueous phase was extracted thrice with EtOAc. The combined organics were washed with water, brine, and dried (MgSO4). Filtration and concentration gave the crude product. Purification via preparative HPLC (silica gel, 2:1 heptane/EtOAc), followed by crystallization from ether/pentane afforded 5.6 g of the product as a solid, m.p. 42°-44° C.

1. customThe layers were separated
2. extractionthe aqueous phase was extracted thrice with EtOAc
3. washThe combined organics were washed with water, brine
4. dry with materialdried (MgSO4)
5. filtrationFiltration and concentration
6. customgave the crude product
7. customPurification via preparative HPLC (silica gel, 2:1 heptane/EtOAc)
8. customfollowed by crystallization from ether/pentane