Triphenylphosphine → Benzene, 1-bromo-4-(3-bromo-2-methyl-1-propen-1-yl)-

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Reaction Steps

To an acetonitrile solution (180 mL) of triphenylphosphine (24.3 g, 92.7 mmol) was added dropwise bromine (4.78 mL, 185 mmol) at 0° C. and the mixture was stirred at the same temperature for 30 minutes. To the solution was added the acetonitrile solution (60 mL) of 3-(4-bromophenyl)-2-methyl-2-propen-1-ol obtained in Reference Example 106 (20.1 g, 88.3 mmol) and the mixture was stirred at 0° C. for 1 hour. The reaction solution was concentrated under reduced pressure, diethyl ether (200 mL) was added to the residue, and the insolubles were filtered off. The solution was washed with a saturated brine, dried over sodium sulfate, and then concentrated under reduced pressure to obtain 25.0 g (yield 98%) of the title compound as an oily matter.

Provenance & Evidence