p-Toluenesulfonic acid monohydrate → 6-bromo-2-(4-(2-hydroxyethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-one

HRID 555566

Reaktionsgleichung

Reaktionsgleichung von HRID 555566
[NH2:1][C:2]1[CH:10]=[CH:9][C:8]([Br:11])=[CH:7][C:3]=1[C:4]([NH2:6])=[O:5].[Si:12]([O:19][CH2:20][CH2:21][O:22][C:23]1[CH:30]=[CH:29][C:26]([CH:27]=O)=[CH:25][C:24]=1[CH3:31])([C:15]([CH3:18])([CH3:17])[CH3:16])([CH3:14])[CH3:13].OS([O-])=O.[Na+].[CH3:37]C1C=CC(S(O)(=O)=O)=CC=1.O>CC(N(C)C)=O.O>[Br:11][C:8]1[CH:7]=[C:3]2[C:2](=[CH:10][CH:9]=1)[N:1]=[C:27]([C:26]1[CH:25]=[C:24]([CH3:31])[C:23]([O:22][CH2:21][CH2:20][OH:19])=[C:30]([CH3:37])[CH:29]=1)[NH:6][C:4]2=[O:5].[Br:11][C:8]1[CH:7]=[C:3]2[C:2](=[CH:10][CH:9]=1)[N:1]=[C:27]([C:26]1[CH:29]=[C:30]([CH3:37])[C:23]([O:22][CH2:21][CH2:20][O:19][Si:12]([C:15]([CH3:18])([CH3:17])[CH3:16])([CH3:14])[CH3:13])=[C:24]([CH3:31])[CH:25]=1)[NH:6][C:4]2=[O:5]

Komponenten

8

Edukt 4

HCID 521998p-Toluenesulfonic acid monohydrateHCID 50192712-Amino-5-bromobenzamideHCID 23665763Sodium BisulfiteHCID 866107984-[2-(Tert-butyl-dimethylsilanyloxy)-ethoxy]-3-methylbenzaldehyde

Produkt 2

HCID 1360379926-bromo-2-(4-(2-hydroxyethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-oneAusbeute 22 %HCID 1360380196-bromo-2-(4-(2-(tert-butyldimethylsilyloxy)ethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-oneAusbeute 10 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 31374DimethylacetamideLösungsmittel

Versuchsvorschrift

A mixture of 2-amino-5-bromobenzamide (0.100 g, 0.465 mmol), 4-(2-(tert-butyldimethylsilyloxy)ethoxy)-3-methylbenzaldehyde (0.143 g, 0.465 mmol), NaHSO3 (94%, 0.0515 g, 0.465 mmol), and p-TsOH.H2O (0.00885 g, 0.0465 mmol) in DMA (5.81 mL) was heated at reflux for 15 min, cooled to room temperature, the water (20 mL) was added. The precipitate was filtered, washed with water, triturated with acetone and filtered again. The crude solid was chromatographed on silica gel (CH2Cl2/CH3OH) to provide 6-bromo-2-(4-(2-hydroxyethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-one (0.0395 g, 22%) and 6-bromo-2-(4-(2-(tert-butyldimethylsilyloxy)ethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-one (0.0227 g, 10%) as white solids. Selected data for 6-bromo-2-(4-(2-hydroxyethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-one: 1H NMR (300 MHz, DMSO-d6) δ 12.48 (s, 1H), 8.20 (d, J=2.34 Hz, 1H), 8.01-7.80 (m, 3H), 7.66 (d, J=8.72 Hz, 1H), 4.90 (t, J=5.46 Hz, 1H), 3.85 (t, J=4.87 Hz, 2H), 3.73 (dd, J=10.06, 5.11 Hz, 2H), 2.32 (s, 6H); MS (APCI) m/z 345 [M+H]+. Selected data for 6-bromo-2-(4-(2-(tert-butyldimethylsilyloxy)ethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-one: 1H NMR (300 MHz, DMSO-d6) δ 12.49 (s, 1H), 8.20 (d, J=2.34 Hz, 1H), 7.95 (dd, J=8.71, 2.41 Hz, 1H), 7.90 (s, 2H), 7.67 (d, J=8.72 Hz, 1H), 3.90 (m, 4H), 2.32 (s, 6H), 0.90 (s, 9H), 0.09 (s, 6H); MS (APCI) m/z 503 [M+H]+.

Aufarbeitung

  1. temperaturewas heated
  2. temperatureat reflux for 15 min
  3. filtrationThe precipitate was filtered
  4. washwashed with water
  5. customtriturated with acetone
  6. filtrationfiltered again
  7. customThe crude solid was chromatographed on silica gel (CH2Cl2/CH3OH)

Quellen und Nachweise

ORD-Eintrag
ord-2cc79ba3179547568dabd348225dd0e7
Quelldatensatz
uspto-grants-2011_11
Patentnummer
US08053440B2

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