Reaktion #5046

Reaktionsgleichung

Sodium cyanoborohydride

N-(3-chlorophenyl)-1,2-diaminoethane

3-quinuclidinone hydrochloride

acetic acid

→

desired product

Ausbeute 3.7%

N-(1-azabicyclo[2.2.2]oct-3-yl)-N'-(3-chlorophenyl)-1,2-diaminoethane

Ausbeute 3.7%

Lösungsmittel

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe reaction mixture is refluxed for 10 hours
2. 2
   Temperaturcooled
3. 3
   Filtrationfiltered
4. 4
   SonstigeAfter evaporation to dryness the residue
5. 5
   Extraktionextracted three times with ethyl acetate
6. 6
   WaschenThe organic layer is washed with brine
7. 7
   Trocknendried over anhydrous sodium sulfate
8. 8
   Filtrationafter filtration
9. 9
   Sonstigeevaporated to dryness
10. 10
    SonstigeThe residue is purified by silica gel flash-chromatography (methylene chloride--methanol--30% ammonium hydroxide, 150:50:5 as eluant)

Vorschrift

To a stirred solution of N-(3-chlorophenyl)-1,2-diaminoethane (1 g; 0,00586 moles) in 25 ml of anhydrous methanol kept under nitrogen atmosphere, 3-quinuclidinone hydrochloride (1.01 g, 0.0062? moles) is added. The pH is adjusted to pH 6 by addition of glacial acetic acid. Sodium cyanoborohydride (0.74 g; 0.0117 moles) is added in two portions. The reaction mixture is refluxed for 10 hours, cooled and then filtered. After evaporation to dryness the residue is taken up with water, basified with 20% sodium hydroxide solution and extracted three times with ethyl acetate. The organic layer is washed with brine, dried over anhydrous sodium sulfate and, after filtration, evaporated to dryness. The residue is purified by silica gel flash-chromatography (methylene chloride--methanol--30% ammonium hydroxide, 150:50:5 as eluant) to give the desired product as a clear oil (0.06 g).

Quelle