(Diethylamino)sulfur trifluoride → 2-Chloro-5-fluoro-4-(1-fluoro-1-methyl-ethyl)pyrimidine
Reaktionsgleichung
C(N(S(F)(F)[F:7])CC)C.[Cl:10][C:11]1[N:16]=[C:15]([C:17](O)([CH3:19])[CH3:18])[C:14]([F:21])=[CH:13][N:12]=1>ClCCl>[Cl:10][C:11]1[N:16]=[C:15]([C:17]([F:7])([CH3:19])[CH3:18])[C:14]([F:21])=[CH:13][N:12]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- -78 °C
Versuchsvorschrift
Diethylaminosulfur trifluoride (6.53 g, 40.5 mmol) is added drop wise to a −78° C. solution of 2-(2-chloro-5-fluoro-pyrimidin-4-yl)propan-2-ol (4.825 g, 25.31 mmol) in dichloromethane (70 mL) under nitrogen. The reaction is stirred at −78° C. for 30 minutes under nitrogen, is then quenched with aqueous saturated sodium bicarbonate and is warmed to room temperature. The reaction mixture is extracted three times with ethyl acetate. The combined organic layers are dried over sodium sulfate and concentrated under vacuum. The resulting crude product is purified over silica gel with a 40 minute, 5% to 100% ethyl acetate in hexanes gradient to give the title compound (4.23 g, 87%). ES/MS (m/e): (35Cl/37Cl) 193/195 (M+H).
Aufarbeitung
- customis then quenched with aqueous saturated sodium bicarbonate
- temperatureis warmed to room temperature
- extractionThe reaction mixture is extracted three times with ethyl acetate
- dry with materialThe combined organic layers are dried over sodium sulfate
- concentrationconcentrated under vacuum
- customThe resulting crude product is purified over silica gel with a 40 minute
Quellen und Nachweise
- ORD-Eintrag
- ord-16546ef09df94f6382773454c75146a6
- Quelldatensatz
- uspto-grants-2014_11
- Patentnummer
- US08889856B2
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