Br[C:2]1[C:11]2[C:10]([CH3:13])([CH3:12])[CH2:9][CH2:8][C:7]([CH3:15])([CH3:14])[C:6]=2[CH:5]=[C:4]([CH3:16])[C:3]=1[OH:17].C[O-].[Na+].[C:21](OCC)(=[O:23])C.O>CO>[CH3:21][O:23][C:2]1[C:11]2[C:10]([CH3:13])([CH3:12])[CH2:9][CH2:8][C:7]([CH3:15])([CH3:14])[C:6]=2[CH:5]=[C:4]([CH3:16])[C:3]=1[OH:17]To the solution of 1-Bromo-3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthalenol (12.8 g, 43.06 mmol) and sodium methoxide in methanol (5.0M) was added CuBr (1.24 g, 8.61 mmol) followed by ethyl acetate (2.5 mL). The reaction was stirred and heated to reflux for 16 hours. The reaction mixture was cooled to room temperature then poured into water and extracted with ethyl acetate. The separated organic layer was washed with brine, dried over magnesium sulfate and concentrated to yield 1-Methoxy-3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthalenol (9.58 g, 89.57%). 1H NMR (CDCl3): δ 1.27 (s, 6H), 1.36 (s, 6H), 1.63-1.67 (m, 4H), 2.21 (s, 3H), 2.53 (s, 3H), 2.57 (s, 3H), 3.87 (s, 3H), 3.90 (s, 3H), 5.15 (d, 1H), 6.30 (s, 1H), 6.94 (s, 1H), 6.98 (s, 1H), 7.13 (d, 1H), 8.35 (s, 1H). APCI-MS m/z 532 (M+1).
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