[CH3:1][CH:2]([CH2:6][CH2:7][CH2:8][CH:9]([CH3:11])[CH3:10])[CH2:3][CH2:4]O.P(Br)(Br)[Br:13].O>CCCCCC>[CH3:1][CH:2]([CH2:6][CH2:7][CH2:8][CH:9]([CH3:11])[CH3:10])[CH2:3][CH2:4][Br:13]To neat 3,7-dimethyloctanol (5 ml) was added phosphorus tribromide (1.01 ml). The mixture was stirred for 4 hours at 60° C. The reaction mixture was added to a mixture of water and n-hexane. The organic layer was separated and dried over magnesium sulfate. The magnesium sulfate was filtered off, and the filtrate was evaporated under reduced pressure to give 3,7-dimethyloctyl bromide (4.40 g).
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