Water → HCID 12971640, compound

Participants

Reaction Conditions

Reaction Steps

NaH 60% (110 mg, 2.8 mmol) was added at 0° C. to a mixture of 8-methyl-5-(4-(N,N-dimethylsulfamoyl)phenyl)-6,7,8,9-tetrahydro-1-H-pyrrolo[3,2-h]isoquinoline-2,3-dione (1 g, 2.5 mmol) in dimethylformamide (10 ml). The mixture was stirred at 0° C. for 10 min. Methyliodide (175 μl, 2.8 mmol) was added and the mixture was stirred or one hour at ambient temperature. The reaction mixture was poured into water (20 ml) and extracted with ethyl acetate (2×25 ml). The organic phase was dried over sodium sulphate and evaporated. Pure 1-methyl-8-methyl-5-(4-(N,N-dimethylsulfamoyl)phenyl)-6,7,8,9-tetrahydro-pyrrolo[3,2-h]isoquinoline-2,3-dione was obtained after purification on silica gel using dichloromethane/acetone/methanol (8:1:1) as the eluent. Yield 160 mg, m.p. 232-240° C. (decomposes).

Provenance & Evidence