Hydrochloric Acid → HCID 68523043, compound

Participants

Reaction Steps

To a solution of ethyl{acetyl[4-(5-nitropyridin-2-yloxy)phenyl]amino}acetate (2.30 g, 6.40 mmol) in ethanol (50 mL) was added 5 M aqueous sodium hydroxide (1.92 mL, 9.60 mmol), and the resulting solution was stirred at room temperature for 30 minutes. To this reaction solution were added 5 M hydrochloric acid (2 mL) and water, and extracted with ethyl acetate. The ethyl acetate layer was washed with brine, dried over anhydrous sodium sulfate, evaporated, and the obtained residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=1:1), to thereby yield 1.68 g of an oil. To a solution of this oil in DMF (10 mL) were added 1-piperonylpiperazine (1.29 g, 5.86 mmol), triethylamine (1.85 mL, 13.3 mmol) and diethyl cyanophosphonate (1.07 mL, 6.36 mmol), and the resulting solution was stirred for 1 hour at room temperature. To this reaction solution was added water and extracted with ethyl acetate. The ethyl acetate layer was washed with brine, dried over anhydrous sodium sulfate, evaporated, and the residue was purified by silica gel column chromatography (dichloromethane:methanol=30:1), to thereby yield 2.21 g of the title compound.

Provenance & Evidence