反应详情

(4-Methoxy-3-nitro-phenyl)-(3-ethoxy-4-methoxy-phenyl)-methanol was prepared analogously to 3-(3-amino-4-methoxy-phenyl)-3-(3,4-dimethoxy-phenyl)-acrylonitrile using 3-ethoxy-4-methoxy-bromobenzene (7.6 g, 33 mmol), magnesium turning (0.8 g, 33 mmol) and 4-methoxy-3-nitro-benzaldehyde (5.0 g, 27.6 mmol). The crude product was purified by flash chromatography (silica gel, CH2Cl2:EtOAc 9:1) to afford (4-methoxy-3-nitro-phenyl)-(3-ethoxy-4-methoxy-phenyl)-methanol (3.9 g, 42%): 1H NMR (CDCl3) δ 7.88 (d, J=2 Hz, 1H), 7.53-7.49 (dd, J=3, 9 Hz, 1H), 7.05 (d, J=8 Hz, 1H), 6.84 (s, 3H), 5.75 (d, J=3 Hz, 1H), 4.01 (m, 2H), 3.94 (s, 3H), 3.86 (s, 3H), 2.30 (d, J=3 Hz, 1H), 1.44 (t, 3H).

1. customThe crude product was purified by flash chromatography (silica gel, CH2Cl2:EtOAc 9:1)