Hydrochloric Acid → 6-Fluoro-2-(4-(morpholinomethyl)phenyl)quinoline-4-carboxylic acid

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In a 20 ml microwave vial, 5-fluoroisatin (650 mg, 4 mmol) was suspended in ethanol (7 ml), then, 1-[4-(morpholinomethyl)phenyl]ethanone (preparation 6) (863 mg, 4 mmol) was added followed by water (7 ml). To this suspension potassium hydroxide (2.21 g, 39 mmol) was added at room temperature. The microwave vial was sealed and the reaction mixture was heated at 125° C. for 20 min under microwave irradiation. The resulting solution was diluted with water (50 ml) and adjusted to pH 7-8 with 10% HCl. The resulting precipitate was filtered and washed with water (50 ml) and ethyl acetate (100 ml) to obtain the desired product as an off-white solid (1.1 g, Yield: 76%).

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