Reaktion #491941

Reaktionsgleichung

tetra-n-butyl-ammonium hydroxide

N-(4-fluoro-phenyl)-6-chloro-nicotinamide

2-bromomethyl-pyridine hydrobromide

sodium hydroxide

→

nicotinamide

Lösungsmittel

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe biphasic reaction mixture
2. 2
   Sonstigethe aqueous layer removed by pipette
3. 3
   workup.ADDITIONThe organic layer was diluted with ethyl acetate (20 mL)
4. 4
   Waschenwashed with water, saturated aqueous sodium chloride
5. 5
   Trocknendried over sodium sulfate
6. 6
   FiltrationThe organic layer was filtered
7. 7
   Sonstigeremoved by rotary evaporation

Vorschrift

In a round bottom flask, N-(4-fluoro-phenyl)-6-chloro-nicotinamide (0.905 g, 3.62 mmol) and 2-bromomethyl-pyridine hydrobromide (0.915 g, 3.62 mmol) was suspended in toluene (5 ml). 50% aqueous sodium hydroxide (2.0 mL) was added to the reaction mixture, followed by tetra-n-butyl-ammonium hydroxide (100 ul). The biphasic reaction mixture was vigorously stirred overnight, and the aqueous layer removed by pipette. The organic layer was diluted with ethyl acetate (20 mL) and washed with water, saturated aqueous sodium chloride and dried over sodium sulfate. The organic layer was filtered and removed by rotary evaporation to yield 1.19 g (96%) of nicotinamide intermediate X as an off white solid. ESI-MS m/z=341.9, 343.9 [M+H]+.

Quelle