Dimethylformamide → 4-[2-(4-Fluorophenyl)-ethoxy]-quinoline-6-carbaldehyde

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Reaction Steps

To a solution of 2-(4-fluorophenyl)-ethanol (350 mg, 2.42 mmol) in DMF (15 mL) was added sodium hydride (69.75 mg, 2.91 mmol) at 0° C. and stirred for 15 min at this temperature. Then, a solution of butyl (4-chloroquinolin-6-ylmethylene)-amine (preparation was described in example 27b) (239 mg, 0.97 mmol) in DMF (2.5 mL) was added at 0° C. After addition, the reaction mixture was allowed to warm to room temperature and stirred for 15 h. Then, the mixture was diluted with saturated ammonium chloride solution and the organic compound was extracted into ethyl acetate (3×50 mL). The combined extracts were washed with brine solution and dried over anhydrous magnesium sulfate. After filtration of the drying agent, the solvent was removed under the vacuum and the oily residue was dissolved in THF (5 mL) and 3 mL of HCl solution (3.0N) was added. The resulting solution was stirred for 4 h at room temperature. Then, it was neutralized with saturated sodium bicarbonate solution and the organic compound was extracted into ethyl acetate (3×50 mL). The combined extracts were washed with brine solution and dried over anhydrous magnesium sulfate. After filtration of the drying agent, the solvent was removed under the vacuum and the residue was purified by using a Biotage silica gel column chromatography to obtain 85 mg (11.9% yield) of 4-[2-(4-fluorophenyl)-ethoxy]-quinoline-6-carbaldehyde as a light yellow solid: EI-HRMS m/e calcd for C18H14FNO2 (M+) 295.1009, found 295.1010.

Provenance & Evidence