1,1-Dichloroethane → 3-Azidomethyl-7-chloro-4-oxo-1-phenyl-1,4-dihydro-quinoline-2-carboxylic acid dimethylamide

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Reaction Steps

In a 50 mL round bottom flask, 7-chloro-3-methyl-4-oxo-1-phenyl-1,4-dihydro-quinoline-2-carboxylic acid dimethylamide (0.54 g, 1.58 mmol), N-bromosuccinimide (0.367 g, 2.06 mmol) and AIBN (78 mg, 0.475 mmol) were added to dichloroethane (6.0 mL). The reaction mixture was heated to reflux for 5 hr. The mixture was concentrated to dryness and the crude (containing 3-bromomethyl-7-chloro-4-oxo-1-phenyl-1,4-dihydro-quinoline-2-carboxylic acid dimethylamide) was redissolved in DMF (6.0 mL). To the reaction mixture was added sodium azide (0.515 g, 7.92 mmol). The reaction was stirred at room temperature overnight. The mixture was partitioned between ethyl acetate and water and the organic layer was washed with aqueous sodium bicarbonate solution. The organic layer was dried, evaporated to dryness and purified by flash chromatography using 40% ethyl acetate-hexane to afford 3-azidomethyl-7-chloro-4-oxo-1-phenyl-1,4-dihydro-quinoline-2-carboxylic acid dimethylamide (260 mg, 43% yield).

Provenance & Evidence