[CH2:1]([O:8][C:9]1[CH:16]=[CH:15][C:12]([CH2:13]O)=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Br:17]N1C(=O)CCC1=O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>ClCCl>[CH2:1]([O:8][C:9]1[CH:16]=[CH:15][C:12]([CH2:13][Br:17])=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1To 4-benzyloxybenzyl alcohol (8.1 g, 37.8 mmol) in dichloromethane (160 mL) was added N-bromosuccinimide (7.4 g, 41.6 mmol) followed by portionwise addition of triphenylphosphine (10.9 g, 41.6 mmol). The reaction mixture was stirred at room temperature for 5 minutes, and was then concentrated in vacuo. Purification by flash chromatography, eluting with 80:20 hexanes/ethyl acetate, provided 9.7 g (92%) of 1 as a white solid.
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