Ethyl Acetate → 2-Pyridin-2-yl-3-quinolin-4-yl-pyrazolo[5,1-c]morpholin-4-one

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A mixture of 3-ethoxycarbonyl-5-pyridin-2-yl-4-quinolin-4-yl-pyrazole (0.35 g, 1.00 mmol), 2-bromoethanol (0.15 g, 1.12 mmol), and cesium carbonate (0.50 g, 1.5 mmol) in N,N-dimethylformamide (20 mL) is heated at 60° C. for 2 h. The mixture is cooled to room temperature and poured into ethyl acetate (60 mL). The organic portion is washed with water, dried (sodium sulfate), filtered, and concentrated in vacuo. The residue is chromatographed on SiO2 (ethyl acetate/hexane) to yield the title compound, 110 mg (32%).

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