Reaktion #2477117

Reaktionsgleichung

2-[2-(trifluoromethyl)-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl]ethanamine

triethylamine

acetyl chloride

→

title compound

Ausbeute 76.0%

N-{2-[2-(trifluoromethyl)-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl]ethyl}acetamide

Ausbeute 76.0%

Lösungsmittel

tetrahydrofuran

sodium hydrogen carbonate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturcooling
2. 2
   Extraktionthe mixture was extracted with ethyl acetate
3. 3
   TrocknenThe extract was dried over anhydrous magnesium sulfate
4. 4
   Sonstigethe solvent was evaporated under reduced pressure
5. 5
   SonstigeThe residue was purified by silica gel column chromatography (ethyl acetate/hexane=70/30→100/0) and recrystallization (ethyl acetate/hexane)

Vorschrift

To a solution of 2-[2-(trifluoromethyl)-8,9-dihydrofuro[3,2-c]pyrazolo[1,5-a]pyridin-1-yl]ethanamine (70 mg, 0.26 mmol) and triethylamine (72 μL, 0.52 mmol) in tetrahydrofuran (3 mL) was added acetyl chloride (22 μL, 0.31 mmol) under ice-cooling, and the mixture was stirred at room temperature for 1 hr. The reaction solution was diluted with saturated aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane=70/30→100/0) and recrystallization (ethyl acetate/hexane) to give the title compound (61.8 mg, yield 76%).

Quelle