反应详情

3-(4-Aminophenyl)-3-(3,4-dimethoxyphenyl)acrylonitrile was prepared analogously to 3-(3,4-dimethoxyphenyl)-3-(3-aminophenyl)acrylonitrile using 3-(3,4-dimethoxyphenyl)-3-(4-nitrophenyl)acrylonitrile (1.24 g, 4 mmol) and 0.15 g of 10% palladium on carbon catalyst in 100 mL of ethyl acetate. The crude mixture was purified by flash column chromatography (silica gel, 5% ethyl acetate/methylene chloride) to afford 0.19 g (17%) of a mixture of the E and Z isomers as a yellow solid: mp 150-152° C.; 1H NMR (CDCl3) δ 7.38-6.56 (m, 14 H); 5.51 (s, 1 H), 5.44 (s, 1 H), 3.97 (br s, 4 H), 3.93 (s, 3 H), 3.91 (s, 3 H), 3.85 (s, 3 H), 3.82 (s, 3 H); 13C NMR (CDCl3) δ 162.8, 162.6, 150.8 148.8, 148.7, 148.5, 148.4, 132.4, 131.4, 130.1, 129.5, 129.9, 128.6, 126.7, 123.0, 122.1, 114.4, 114.3, 112.8, 111.6, 110.7, 90.3, 89.9, 56.0, 55.9; Anal. Calcd for C17H16N2O3. Theoretical: C, 72.84; H, 5.75; N, 9.99. Found: C, 72.79; H, 5.83; N, 9.59.

1. customThe crude mixture was purified by flash column chromatography (silica gel, 5% ethyl acetate/methylene chloride)