反应详情

The solution of 13.95 g of 2-bromo-5-methylphenylamine in 250 ml of chloroform is cooled to 0° C. with stirring and admixed with 12.6 ml of triethylamine. 7.56 ml of cyclopropanecarbonyl chloride are slowly added dropwise. The mixture is stirred for 1 hour each at 0° C. and at room temperature. The reaction mixture is poured onto water (400 ml) and extracted with dichloromethane (1×250 ml). The organic phases are washed with brine (350 ml), dried over sodium sulphate and concentrated by evaporation. The title compound is obtained as a white solid from the residue by means of crystallization from ethyl acetate. Rf=0.37 (1:4 EtOAc-heptane); Rt=4.19.

1. stirringThe mixture is stirred for 1 hour each at 0° C.
2. customat room temperature
3. additionThe reaction mixture is poured onto water (400 ml)
4. extractionextracted with dichloromethane (1×250 ml)
5. washThe organic phases are washed with brine (350 ml)
6. dry with materialdried over sodium sulphate
7. concentrationconcentrated by evaporation