Potassium Carbonate → HCID 69270198, compound

Participants

Reaction Conditions

Reaction Steps

Add to a mixture of 3-(5-hydroxybenzofur-7-yl)-1-methyl-4-(1-methyl-1H-indol-3-yl)pyrrole-2,5-dione (2.5 g, 6.7 mmol) and potassium carbonate (2.78 g, 20.1 mmol) in N,N-dimethylformamide (40 ml), 2-(2-bromoethoxy)tetrahydropyran (3.04 ml, 20.1 mmol). Heat the mixture to 80° C. under nitrogen atmosphere for overnight. Diluted with ethyl acetate, wash with water, brine, dry over magnesium sulfate, filter and concentrate to red solid. Dissolve the solid in methanol (40 ml), add p-toluenesulfonic acid (3 g), stir for 20 minutes. Diluted with ethyl acetate, wash with water, brine, dry over magnesium sulfate, filter and concentrate to afford the title compound (1.88 g, 67%) as a red solid. HRMS: calculated 417.1450 found 417.1462.

Provenance & Evidence