Diethyl (cyanomethyl)phosphonate → HCID 54442169, compound

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Reaction Steps

(3-Cyclopentyloxy-4-methoxy-phenyl)-phenyl-methanone (0.5 g, 1.7 mmol), cyanomethylphosphonic acid diethyl ester (0.3 ml, 1.9 mmol) in anhydrous THF (10 ml), and lithium bis(trimethylsilyl)amide (1.3 M solution in THF, 1.4 ml, 1.9 mmol) were treated in the same manner as described above for the synthesis of 3-(3,5-dimethoxy-phenyl)-3-(3-methoxy-phenyl)-acrylonitrile. The crude was purified by flash column chromatography to give 3-(3-cyclopentyloxy-4-methoxy-phenyl)-3-phenyl-acrylonitrile as a solid (0.41 g, 76%): mp, 90.6-93° C.; 1H NMR (CDCl3) δ 7.54-7.24 (m, 10H), 7.05-6.73 (m, 6H), 5.66 (s, 1H), 5.60 (s, 1H), 4.81-4.62 (m, 2H), 3.89 (s, 3H), 3.87 (s, 3H), 2.00-1.45 (m, 16H); 13C NMR (CDCl3) δ 162.8, 162.8, 152.2, 151.6, 147.4, 147.3, 139.5, 137.2, 130.2, 129.9, 129.6, 129.3, 128.7, 128.5, 128.4, 123.0, 121.8, 118.4, 118.3, 116.1, 114.8, 111.3, 93.2, 92.7, 80.6, 56.0, 32.8, 32.7, 24.1, 24.0; Anal. Calcd. For C21H21NO2: C, 78.97; H, 6.63; N, 4.39. Found: C, 78.85; H, 6.59; N, 4.31.

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