1,2,3-Trimethoxybenzene → (3,5-Dimethoxyphenyl)-(2-hydroxy-3,4-dimethoxyphenyl)methanone

HRID 2378179Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2378179
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:9]=[C:10]([O:12][CH3:13])[CH:11]=1)[C:6](Cl)=[O:7].[CH3:14][O:15][C:16]1[CH:21]=[CH:20][CH:19]=[C:18]([O:22]C)[C:17]=1[O:24][CH3:25].[Cl-].[Al+3].[Cl-].[Cl-].COC1C=CC(OC)=CC=1C(C1C=C(OC)C=C(OC)C=1)=O>C(Cl)Cl>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([C:6]([C:19]2[CH:20]=[CH:21][C:16]([O:15][CH3:14])=[C:17]([O:24][CH3:25])[C:18]=2[OH:22])=[O:7])[CH:9]=[C:10]([O:12][CH3:13])[CH:11]=1

Komponenten

6

Edukt 4

HCID 124621,2,3-TrimethoxybenzeneHCID 870033,5-Dimethoxybenzoyl chlorideHCID 6451240Aluminum(III) ChlorideHCID 69203595(2,5-Dimethoxy-phenyl)-(3,5-dimethoxy-phenyl)-methanone

Produkt 1

HCID 69205198(3,5-Dimethoxyphenyl)-(2-hydroxy-3,4-dimethoxyphenyl)methanoneAusbeute 50,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

3,5-Dimethoxybenzoyl chloride (5.19 g, 25.87 mmol), 1,2,3-trimethoxybenzene (4.35 g, 25.87 mmol) in anhydrous methylene chloride (40 ml), and aluminum chloride (3.79 g, 28.45 mmol) were treated in the same manner as described above for the synthesis of (2,5-dimethoxy-phenyl)-(3,5-dimethoxy-phenyl)-methanone. The crude material was purified via flash column chromatography (20% EtOAc in hexane) to give (3,5-dimethoxy-phenyl)-(2-hydroxy-3,4-dimethoxy-phenyl)-methanone as a yellow solid (4.15 g, 50%); 1HNMR (CDCl3) δ 12.36 (s, 1H, OH), 7.42 (d, J=9 Hz, 1H, Ar), 6.75 (d, J=2 Hz, 2H, Ar), 6.64 (t, J=2 Hz, 1H, Ar), 6.47 (d, J=9 Hz, 1H, Ar), 3.94 (s, 6H, 2OCH3), 3.84 (s, 6H, 2OCH3); 13C NMR (CDCl3) δ 200.4, 160.7, 158.9, 158.0, 140.1, 136.9, 130.3, 114.6, 107.0, 103.8, 102.9, 60.9, 56.3, 55.7; Anal. Calcd. For C17H8O6: C, 64.14; H, 5.70. Found: C, 64.29; H, 5.42; N, <0.05. The product was carried over to the next step.

Aufarbeitung

  1. customThe crude material was purified via flash column chromatography (20% EtOAc in hexane)

Quellen und Nachweise

ORD-Eintrag
ord-4c78c7f23124487d801d962249b33be7
Quelldatensatz
uspto-grants-2008_12
Patentnummer
US07470723B2

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