Diethyl (cyanomethyl)phosphonate → 3-(3-Ethoxy-4-methoxy-phenyl)-3-(4-methoxy-3-methyl-phenyl)-acrylonitrile

HRID 2378278ノート

反応式

HRID 2378278 の反応式
C(OP([CH2:9][C:10]#[N:11])(=O)OCC)C.C[Si]([N-][Si](C)(C)C)(C)C.[Li+].[CH2:22]([O:24][C:25]1[CH:26]=[C:27]([C:33]([C:35]2[CH:40]=[CH:39][C:38]([O:41][CH3:42])=[C:37]([CH3:43])[CH:36]=2)=O)[CH:28]=[CH:29][C:30]=1[O:31][CH3:32])[CH3:23]>C1COCC1>[CH2:22]([O:24][C:25]1[CH:26]=[C:27]([C:33]([C:35]2[CH:40]=[CH:39][C:38]([O:41][CH3:42])=[C:37]([CH3:43])[CH:36]=2)=[CH:9][C:10]#[N:11])[CH:28]=[CH:29][C:30]=1[O:31][CH3:32])[CH3:23]

参加物

5

反応物 3

HCID 75676Diethyl (cyanomethyl)phosphonateHCID 2733832Lithium HexamethyldisilazideHCID 69205620HCID 69205620、化合物

生成物 1

HCID 692040293-(3-Ethoxy-4-methoxy-phenyl)-3-(4-methoxy-3-methyl-phenyl)-acrylonitrile収率 75%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

To a stirred solution of cyanomethylphosphonic acid diethyl ester (1.3 mL, 8.3 mmol) in THF (20 mL) in an ice bath was added lithium bis(trimethylsilyl)amide (1.0 M solution in THF, 8.3 mL, 8.3 mmol) dropwise. The mixture was stirred at room temperature for 40 min. A solution of (3-ethoxy-4-methoxy-phenyl)-(4-methoxy-3-methyl-phenyl)-methanone from above in THF (10 mL) was added to the mixture. The mixture was refluxed for 4 h. The solution was poured into ice water (30 mL). The aqueous layer was extracted with ethyl acetate (2×50 mL). The combined organic layers was washed with water (50 mL), sodium hydrogen carbonate (50 mL, sat), brine (50 mL) and dried over magnesium sulfate. Removal of solvent and chromatography (Silica Gel) gave a mixture of (E/Z) 3-(3-ethoxy-4-methoxy-phenyl)-3-(4-methoxy-3-methyl-phenyl)-acrylonitrile as a white solid (0.97 g, 75% yield) (isomer ratio is 1:0.8 by HNMR): mp: 86-88° C.; 1H NMR (DMSO-d6) δ 1.30 (t, J=7 Hz, 3H, CH3), 2.13 (s, 3H, CH3), [2.17 (s)], 3.78 (s, 3H, CH3), 3.82 (s, 3H, CH3), [3.83 (s), 3.86 (s)], 3.93-4.04 (m, 2H, CH2), 6.01 (s, 1H, CH), [6.08 (s)], 6.72-7.26 (m, 6H, Ar); 13C NMR (DMSO-d6) 14.56, 14.59, 15.98, 63.77, 92.10, 92.42, 110.04, 110.18, 111.35, 111.51, 112.27, 113.83, 118.92, 122.27, 122.35, 125.61, 125.86, 128.05, 128.60, 128.92, 129.44, 130.14, 130.35, 130.82, 131.29, 147.36, 147.78, 150.15, 151.02, 158.44, 159.28, 161.47, 161.53; Anal. Calcd for C20H21NO3: C, 74.28; H, 6.55; N, 4.33. Found: C, 74.16; H, 6.48; N, 4.30.

後処理

  1. temperatureThe mixture was refluxed for 4 h
  2. extractionThe aqueous layer was extracted with ethyl acetate (2×50 mL)
  3. washThe combined organic layers was washed with water (50 mL), sodium hydrogen carbonate (50 mL, sat), brine (50 mL)
  4. dry with materialdried over magnesium sulfate
  5. customRemoval of solvent and chromatography (Silica Gel)
  6. customgave

出典と根拠

ORDレコード
ord-805c45153848400eb3afa00510a4d139
出典データセット
uspto-grants-2008_12
特許番号
US07470723B2

反応ノート

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