反应详情

温度

25 °C

To a solution of 5-amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-methylsulfinyl-1H-pyrazole-3-carbonitrile (0.5 g) in acetonitrile was added 2-bromoacetamide (0.18 g) in water and calcium carbonate (0.13 g). The mixture was heated under reflux for 1.5 hours, cooled to 25° C. and a solution of sodium hydroxide (0.05 g) in water added. This was then heated under reflux for one hour, evaporated and the residue purified by preparative thin-layer chromatography eluting first with 20% methanol in dichloromethane to give 1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-methylsulfinyl-5-[(aminocarbonylmethyl)amino]-1H-pyrazole-3-carbonitrile (0.089 g), m.p.155-157° C.

1. temperatureThe mixture was heated
2. temperatureunder reflux for 1.5 hours
3. temperatureThis was then heated
4. temperatureunder reflux for one hour
5. customevaporated
6. customthe residue purified by preparative thin-layer chromatography
7. washeluting first with 20% methanol in dichloromethane