[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([O:15]CC=C)=[CH:11][CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:19]1(C)[CH:24]=C(C)C=C(C)[CH:20]=1>>[CH2:24]([C:11]1[CH:10]=[C:9]([O:8][CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[CH:14]=[CH:13][C:12]=1[OH:15])[CH:19]=[CH2:20]1-Benzyloxy-4-allyloxy-benzene (20.4 g, 84.9 mmol) dissolved in mesitylene (150 ml) was heated at 165° C. for 48 hr under an argon atmosphere. After cooling to ambient temperature the resulting brown oil was chromatographed over SiO2 (Merck 230-400 mesh) eluting with EtOAc-nHexane (1:9) to afford 2-allyl-4-benzyloxy-phenol (17.45 g, 72.6 mmol, 85%) as a pale yellow oil MS m/e=240.1 (M+).
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