[CH2:1]([C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([N+:10]([O-:12])=[O:11])[C:5]=1[OH:13])[CH:2]=[CH2:3].[CH3:14][C:15]([CH3:17])=O.C(=O)([O-])[O-].[K+].[K+].ICC=C>C(OCC)(=O)C>[CH2:1]([C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([N+:10]([O-:12])=[O:11])[C:5]=1[O:13][CH2:17][CH:15]=[CH2:14])[CH:2]=[CH2:3]To a stirred solution of 2-allyl-6-nitrophenol (100 mg, 0.0006 mol) in acetone (4 mL, 0.06 mol) at 0° C. in an ice bath was added potassium carbonate (0.092 g, 0.00067 mol) followed by 3-iodo-1-propene (0.11 g, 0.00067 mol) under an atmosphere of nitrogen. The reaction mixture was stirred for 1 h at 0° C. then warmed to room temperature overnight. The reaction mixture was diluted with ethyl acetate and washed with 10% HCl, water, dried over magnesium sulfate and concentrated in vacuo. The reaction mixture was purified by ISCO chromatography on silica gel (12 g) using ethyl acetate-hexane (10%-50%) to give 1-allyl-2-allyloxy-3-nitrobenzene as a yellow oil (93 mg, 80%). 1H NMR (400 MHz, CDCl3) δ 7.69 (d, 1H, J=8.0 Hz), 7.44 (d, 1H, J=7.8 Hz), 7.16 (t, 1H, J=8.08, 7.8 Hz), 5.90-6.13 (m, 2H), 5.40 (d, 1H, J=17 Hz), 5.29 (d, 1H, J=10 Hz), 5.15 (d, 1H, J=10 Hz), 5.09 (d, 1H, J=17 Hz), 4.50 (d, 2H, J=5.8 Hz), 3.49 (d, 2H, J=6.3 Hz).
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