反应详情

温度

40 °C

45 g (0.15 mol) of 1-(4-chlorophenoxy)-3-methyl-3-trifluoromethylthio-butan-2-one were dissolved in 150 ml of chloroform, and 7.5 ml (0.15 mol) of bromine were added dropwise at 20° C. at such a rate that decolorization occurred continuously. After the end of the addition, the reaction mixture was further stirred at 40° C. for 20 minutes and was then introduced into water. The mixture was extracted with chloroform and concentrated at 40° C. 1-Bromo-1-(4-chlorophenoxy)-3-methyl-3-trifluoromethylthio-butan-2-one was obtained quantitatively and was directly further reacted. ##STR15##

1. additionAfter the end of the addition
2. extractionThe mixture was extracted with chloroform
3. concentrationconcentrated at 40° C