Ammonia → HCID 178477974, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

2-Chloro-6-nitroaniline (3.00 g, 17.4 mmol) and pyridine (7.0 mL, 86.9 mmol) were dissolved in DMA (17 mL), cyclopropanecarbonyl chloride (4.0 mL, 43.5) was added and the mixture was stirred at 50° C. for 3 hr. To the mixture were added methanol (10 mL) and aqueous ammonia (9 mL), and the mixture was stirred at room temperature for 30 min. Water (10 mL) was added, and the precipitated solid was collected by filtration. The solid was suspended in ethanol (38 mL) and water (38 mL), ferrous sulfate 7 hydrate (13.86 g, 49.9 mmol) and aqueous ammonia (19 mL) were added, and the mixture was stirred at 50° C. for 4 hr. The mixture was filtered, and the filtrate was extracted with ethyl acetate, washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. Acetic acid (8 mL) was added to the residue, and the mixture was stirred at 90° C. for 1 hr. The mixture was concentrated under reduced pressure, neutralized with aqueous sodium hydroxide solution, and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. Ethyl acetate (5 mL) and diisopropyl ether (5 mL) were added to the residue, and the precipitated solid was collected by filtration to give the title compound (1.20 g, 36%).

Herkunft & Nachweise