反应详情

To 4.0 g (0.03 mol) of o-chloroaniline in 50 ml of hydrochloric acid at 100° C. was added dropwise 3.4 g (0.04 mol) of 3-penten-2-one. The mixture was refluxed for 12 hours, then neutralised with 5N sodium hydroxide and extracted with dichloromethane. The organic extract was dried and concentrated to an oil. This was purified on a silica gel column to give 2.54 g (42% of the title product; m.p. 66°-68° C. Anal. Calcd. for C11H10NCl: C, 68.94; H, 5.26; N, 7.31; Cl, 18.50. Found C, 68.87; H, 5.27; N, 7.29; Cl, 18.48.

1. temperatureThe mixture was refluxed for 12 hours
2. extractionextracted with dichloromethane
3. extractionThe organic extract
4. customwas dried
5. concentrationconcentrated to an oil
6. customThis was purified on a silica gel column