Water → Methyl 5-(4,6-Dimethoxypyrimidin-2-yl)oxybenzoxazol-4-carboxylate

HRID 51997

Reaktionsgleichung

[OH:1][C:2]1[C:10]([C:11]([O:13][CH3:14])=[O:12])=[C:6]2[N:7]=[CH:8][O:9][C:5]2=[CH:4][CH:3]=1.Cl[C:16]1[N:21]=[C:20]([O:22][CH3:23])[CH:19]=[C:18]([O:24][CH3:25])[N:17]=1.C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O>[CH3:25][O:24][C:18]1[CH:19]=[C:20]([O:22][CH3:23])[N:21]=[C:16]([O:1][C:2]2[C:10]([C:11]([O:13][CH3:14])=[O:12])=[C:6]3[N:7]=[CH:8][O:9][C:5]3=[CH:4][CH:3]=2)[N:17]=1

Komponenten

Reaktionsbedingungen

Temperatur: 115 °C

Versuchsvorschrift

A mixture comprising 0.6 g of methyl 5-hydroxybenzoxazol-4-carboxylate, 0.6 g of 2-chloro-4,6-dimethoxypyrimidine and 0.7 g of potassium carbonate in 30 ml of N,N-dimethylformamide, was heated and stirred at 115° C. for two hours. The mixture was returned to room temperature, then poured into water and extracted with ethyl acetate. The organic layer was washed with water, dried over anhydrous sodium sulfate and then concentrated under reduced pressure. The oily substance thereby obtained was purified by silica gel column chromatography (n-hexane/ethyl acetate=5/1) to obtain 0.4 g (yield: 39%) of the desired compound.

Aufarbeitung

temperaturewas heated
customwas returned to room temperature
extractionextracted with ethyl acetate
washThe organic layer was washed with water
dry with materialdried over anhydrous sodium sulfate
concentrationconcentrated under reduced pressure
customThe oily substance thereby obtained
customwas purified by silica gel column chromatography (n-hexane/ethyl acetate=5/1)

Quellen und Nachweise

ORD-Eintrag: ord-f6ab950981e74ff5a6320c582d1d3431
Quelldatensatz: uspto-grants-1997_04
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US05616537

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