Bromine → HCID 15917766、化合物

反応式

[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[C:9]1([CH3:17])[O:13][CH:12]([CH2:14][O:15][CH3:16])[CH2:11][O:10]1.[Br:18]Br>BrBr.ClC(Cl)(Cl)Cl>[Cl:1][C:2]1[CH:7]=[C:6]([Cl:8])[CH:5]=[CH:4][C:3]=1[C:9]1([CH2:17][Br:18])[O:13][CH:12]([CH2:14][O:15][CH3:16])[CH2:11][O:10]1

参加物

反応条件

温度: 20 °C

実験手順

To 100 parts of 2-(2,4-dichlorophenyl)-2-methyl-4-(methoxymethyl)-1,3-dioxolane in 480 parts of tetrachloromethane are added at 45° C. a few drops of bromine till the reaction starts. Subsequently 19.6 parts of bromine are added dropwise and the whole is stirred for 2 hours at 20° C. The pale yellow solution is washed with a sodium hydrogen carbonate solution, dried and evaporated. A high vacuum distillation yields 65 parts of pure 2-(2,4-dichlorophenyl)-2-(bromomethyl)-4-(methoxymethyl)-1,3-dioxolane; bp. 129°-132° C. at 0.01 mm. pressure.