反应详情

(4-Methoxy-3-nitro-phenyl)-(3,5-dimethoxy-phenyl)-methanol was prepared analogously to 3-(4-methoxy-3-nitro-phenyl)-(3,4-dimethoxy-phenyl)-methanol using 3,5-dimethoxy-bromobenzene (5.0 g, 23.0 mmol), magnesium turning (0.6 g, 23.0 mmol) and 4-methoxy-3-nitro-benzaldehyde (3.5 g, 19.2 mmol). The crude product was purified by flash chromatography (silica gel, Hexane:EtOAc 1:1) to afford (4-methoxy-3-nitro-phenyl)-(3,5-dimethoxy-phenyl)-methanol (3.7 g, 60%) as an oil: 1H NMR (CDCl3) δ 7.88 (s, 1H), 7.54-7.50 (dd, J=2, 8 Hz, 1H), 7.04 (d, J=8 Hz, 1H), 6.38 (d, J=1 Hz, 1H), 5.72 (d, J=3 Hz, 1H), 3.93 (s, 3H), 3.76 (s, 6H), 2.45 (d, 2 Hz, 1H).

1. customThe crude product was purified by flash chromatography (silica gel, Hexane:EtOAc 1:1)