Reaktion #698337

Reaktionsgleichung

(E)-6-(4-stilbenecarbonyl)-4,5,6,7-tetrahydrofuro[2,3-c]pyridine

dimethylamine

formaldehyde

→

desired product

(E)-N,N-dimethyl-[6-(4-stilbenecarbonyl)-4,5,6,7-tetrahydrofuro[2,3-c]pyridin-2-ylmethyl]amine

Lösungsmittel

acetic acid

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.DISTILLATIONAfter the solvent was distilled off under reduced pressure
2. 2
   Extraktionextracted with dichloromethane 2 times
3. 3
   WaschenThe combined organic layer was washed with water
4. 4
   Trocknendried over anhydrous sodium sulfate
5. 5
   workup.DISTILLATIONthe solvent was distilled off under reduced pressure
6. 6
   SonstigeThe resulting crude product was purified by silica gel column chromatography (chloroform/methanol=25/1)

Vorschrift

To a solution of 0.200 g (0.607 mmol) of (E)-6-(4-stilbenecarbonyl)-4,5,6,7-tetrahydrofuro[2,3-c]pyridine in 20 ml of acetic acid, 0.082 ml (0.91 mmol) of 50% aqueous dimethylamine and 0.074 ml (0.91 mmol) of 37% aqueous formaldehyde were added, followed by stirring at 100° C. for 90 minutes. After the solvent was distilled off under reduced pressure, the residual solution was alkalified with 5% aqueous sodium hydrogen carbonate, and extracted with dichloromethane 2 times. The combined organic layer was washed with water and dried over anhydrous sodium sulfate; the solvent was distilled off under reduced pressure. The resulting crude product was purified by silica gel column chromatography (chloroform/methanol=25/1) to yield the desired product.

Quelle