Uracil → 186386-84-5

HRID 342537Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 342537
[H-].[Na+].[NH:3]1[CH:10]=[CH:9][C:7](=[O:8])[NH:6][C:4]1=[O:5].[CH3:11][Si:12]([CH3:19])([CH3:18])[CH2:13][CH2:14][O:15][CH2:16]Cl>CN(C=O)C.O>[CH3:11][Si:12]([CH3:19])([CH3:18])[CH2:13][CH2:14][O:15][CH2:16][N:3]1[CH:10]=[CH:9][C:7](=[O:8])[NH:6][C:4]1=[O:5]

Komponenten

6

Edukt 3

HCID 1174UracilHCID 24758Sodium hydrideHCID 27242712-Chloromethyl 2-(trimethylsilyl)ethyl ether

Produkt 1

HCID 15313904186386-84-5Ausbeute 14,8 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

A solution of 60% sodium hydride (2 g, 50 mmol) in mineral oil was washed with hexanes (2×20 mL) and cooled to 0° C. The solution was diluted with DMF (200 mL) and then uracil (5.6 g, 50 mmol) was added portionwise over 30 minutes. The mixture was treated with 2-(trimethylsilyl)ethoxymethyl chloride (8.8 mL, 50 mmol) and allowed to warm to 25° C. and stand 4 hours. The reaction mixture was diluted with water (500 mL) and extracted with diethyl ether (4×100 mL). The combined extract was washed with brine, dried (Na2SO4), filtered and concentrated. The residue was purified by chromatography on silica gel eluting with hexanes/ethyl acetate (2:1) to give 1-[2-(trimethylsilyl)ethoxymethyl]-2,4(1H,3H)-pyrimidinedione (1.8 g, 7.4 mmol), M.p. 120°-122° C.

Aufarbeitung

  1. temperatureto warm to 25° C.
  2. extractionextracted with diethyl ether (4×100 mL)
  3. extractionThe combined extract
  4. washwas washed with brine
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by chromatography on silica gel eluting with hexanes/ethyl acetate (2:1)

Quellen und Nachweise

ORD-Eintrag
ord-c4b2b0c0221c410eba4c2eed7db8f5b7
Quelldatensatz
uspto-grants-1999_01
Patentnummer
US05859014

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