(Diethylamino)sulfur trifluoride → 4-Chloro-6-(1-fluoroethyl)pyrimidine
反応式
C(N(S(F)(F)[F:7])CC)C.[Cl:10][C:11]1[N:16]=[CH:15][N:14]=[C:13]([CH:17](O)[CH3:18])[CH:12]=1>C(Cl)Cl>[Cl:10][C:11]1[CH:12]=[C:13]([CH:17]([F:7])[CH3:18])[N:14]=[CH:15][N:16]=1参加物
4
反応条件
- 温度
- -78 °C
実験手順
(Diethylamino)sulphur trifluoride (0.337 mL, 2.55 mmol) was added to DCM (13 mL), cooled to −78° C. and treated dropwise with a solution of 1-(6-chloro-4-pyrimidinyl)ethanol (Intermediate 20, 328 mg, 2.068 mmol) in DCM (4 mL) under argon. The resulting mixture was allowed to warm to room temperature and stirred for 4 hours. The reaction was quenched by adding water (5 mL) and extracted with DCM (×2). The DCM layers were separated, combined, dried under magnesium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography (Biotage SP4) eluting with a gradient of 0-25% ethyl acetate and iso-hexane. Product containing fractions were combined and evaporated under reduced pressure to give the title compound as a colourless oil (125 mg);