反应详情

温度

60 °C

Hydroxylamine hydrochloride (22.24 g, 320 mmol) in water (50 mL) was added to a suspension of 2,2,2-trichloro-1-ethoxyethanol (23.21 g, 120 mmol) and sodium sulfate (128 g, 900 mmol) in water (150 mL) and 2N HCl (100 mL). The mixture was stirred at 60° C. for 20 min. 3-Chloro-4-fluoroaniline (14.56 g, 100 mmol) in 2N HCl (100 mL) was added, and the mixture was heated to 90° C. for 2 h. The mixture was cooled to room temperature. The solid was collected by filtration, washed with water, and air dried to afford N-(3-chloro-4-fluorophenyl)-2-(hydroxyimino)ethanamide (19.45 g, 90% yield). This material was used in the next step without further purification.

1. temperaturethe mixture was heated to 90° C. for 2 h
2. temperatureThe mixture was cooled to room temperature
3. filtrationThe solid was collected by filtration
4. washwashed with water, and air
5. customdried