Diethyl (cyanomethyl)phosphonate → 3-(3,4-Dimethoxy-phenyl)-3-(3,4,5-trimethoxy-phenyl)-acrylonitrile

HRID 2378252Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2378252
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]([C:13]2[CH:18]=[C:17]([O:19][CH3:20])[C:16]([O:21][CH3:22])=[C:15]([O:23][CH3:24])[CH:14]=2)=O)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].C(OP([CH2:33][C:34]#[N:35])(=O)OCC)C.C[Si]([N-][Si](C)(C)C)(C)C.[K+].COC1C=C(C(C2C=CC=C(OC)C=2)=CC#N)C=C(OC)C=1>C1COCC1>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:11]([C:13]2[CH:18]=[C:17]([O:19][CH3:20])[C:16]([O:21][CH3:22])=[C:15]([O:23][CH3:24])[CH:14]=2)=[CH:33][C:34]#[N:35])[CH:6]=[CH:7][C:8]=1[O:9][CH3:10]

Komponenten

6

Edukt 4

HCID 75676Diethyl (cyanomethyl)phosphonateHCID 2556053,3',4,4',5-PentamethoxybenzophenoneHCID 3251421Potassium bis(trimethylsilyl)amideHCID 692052993-(3,5-Dimethoxy-phenyl)-3-(3-methoxy-phenyl)-acrylonitrile

Produkt 1

HCID 692031663-(3,4-Dimethoxy-phenyl)-3-(3,4,5-trimethoxy-phenyl)-acrylonitrileAusbeute 77 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

(3,4-Dimethoxy-phenyl)-(3,4,5-trimethoxy-phenyl)-methanone (3.3 g, 10 mmol), cyanomethylphosphonic acid diethyl ester (2.4 ml, 15 mmol) in anhydrous THF (50 ml), and potassium bis(trimethylsilyl)amide (3.0 g, 15 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-(3,4-dimethoxy-phenyl)-3-(3,4,5-trimethoxy-phenyl)-acrylonitrile as a solid (2.7 g, 77%): mp, 119-121° C.; 1H NMR (DMSO-d6) 07.14-7.07 (m, 1H), 7.00-6.77 (m, 2H), 6.66 (d, J=3 Hz, 2H), 6.25 (s, 0.5H), 6.19 (s, 0.5H), 3.84-3.71 (m, 15H); 13C NMR (DMSO-d6) □ 161.38, 161.31, 152.65, 150.99, 150.14, 148.64, 148.18, 139.44, 138.44, 133.69, 132.47, 130.01, 128.88, 122.66, 122.43, 118.66, 118.62, 112.75, 111.31, 111.22, 110.94, 106.88, 106.27, 94.23, 93.53, 60.08, 56.02, 55.98, 55.60, 55.55, 55.48; Anal. Calcd. For C20H21NO5: C, 67.59; H, 5.96; N, 3.94. Found: C, 67.66; H, 5.98; N, 3.88.

Aufarbeitung

  1. customThe crude was purified by flash column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-81d5f08288544c65b5add1cdaa2b1bf1
Quelldatensatz
uspto-grants-2008_12
Patentnummer
US07470723B2

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