1,3-Dimethyladamantane → 1-Bromo-3,5-dimethyladamantane
Reaktionsgleichung
[CH3:1][C:2]12[CH2:11][CH:6]3[CH2:7][CH:8]([CH2:10][C:4]([CH3:12])([CH2:5]3)[CH2:3]1)[CH2:9]2.[Br:13]Br.S([O-])([O-])=O.[Na+].[Na+]>>[Br:13][C:6]12[CH2:11][C:2]3([CH3:1])[CH2:9][CH:8]([CH2:10][C:4]([CH3:12])([CH2:3]3)[CH2:5]1)[CH2:7]2Komponenten
4
Versuchsvorschrift
Mix 0.5 mol of 1,3-dimethyl adamantane with a ten times excess of bromine (5 mol). Slowly heat and stir for 4 hrs under reflux. Subsequently, allow to cool and pour onto ice water. Decompose the excess bromine with sodium sulfite until discoloration of the aqueous solution. Then extract with ether, wash the combined organic phases with sodium bicarbonate solution, dry with magnesium sulfate, filter and evaporate to dryness under vacuum. Recrystallize the residue from methanol. (Yield: 83%).