C([O:4][C:5]1[CH:10]=[CH:9][CH:8]=[C:7]([Cl:11])[C:6]=1[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1[Cl:18])C=C.[C:19]1(C)[CH:24]=C(C)C=C(C)[CH:20]=1>>[CH2:24]([C:10]1[CH:9]=[CH:8][C:7]([Cl:11])=[C:6]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=2[Cl:18])[C:5]=1[OH:4])[CH:19]=[CH2:20]A solution of 2-allyloxy-2′,6-dichlorobiphenyl (11.6 g, 41.8 mmol) in mesitylene (100 mL) was refluxed for 24 h. The solvent was removed under reduced pressure. Purification by ISCO using a solvent gradient of 0 to 20% ethyl acetate in hexanes provided 9.0 g (77%) of 3-allyl-2′,6-dichlorobiphenyl-2-ol as a light yellow oil.
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