Potassium Carbonate → HCID 66642970, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 4-(2-chloroethyl)-7-nitro-2H-1,4-benzoxazine-3(4H)-one (Preparation Example 430) (1.08 g), potassium carbonate (0.87 g) and acetonitrile (10.8 mL), 1-methylpiperazine (1.39 mL) was added and stirred at 80° C. for 48 hours. After the reaction liquid was cooled, saturated aqueous sodium hydrogen carbonate was added, and the reaction liquid was extracted with ethyl acetate and the extract was washed with saturated aqueous sodium chloride. After drying over anhydrous magnesium sulfate, the solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography (eluent; chloroform:methanol=100:0 to 20:1) to give 4-[2-(4-methylpiperazin-1-yl)ethyl]-7-nitro-2H-1,4-benzoxazine-3(4H)-one (690 mg) as a yellow liquid.

Provenance & Evidence