3-Pentanamine → 4-(1-Ethyl-propylamino)-8-methoxy-quinoline-3-carboxylic acid ethyl ester

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4-Chloro-8-methoxy-quinoline-3-carboxylic acid ethyl ester (250 mg, 0.94 mmol) was treated with 1-ethyl-propylamine following general procedure B to afford 4-(1-ethyl-propylamino)-8-methoxy-quinoline-3-carboxylic acid ethyl ester (240 mg). Thus obtained amino-ester was hydrolyzed to the corresponding acid in quantitative yield using general procedure D and then transformed into the corresponding ethylamide (160 mg) following general procedure E.

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