Reaktion #515346

Reaktionsgleichung

2-hydroxy-5-methoxybenzaldehyde

1,4-diazabicyclo[2.2.2]octane

acrylonitrile

→

nitrile

6-Methoxy-2H-3-chromenecarbonitrile

Lösungsmittel

chloroform

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturat reflux for 24 hours under argon
2. 2
   TemperaturAfter cooling
3. 3
   Waschenwashed with a saturated solution of sodium hydrogen carbonate
4. 4
   Extraktionthe aqueous phase is then extracted with chloroform
5. 5
   TrocknenThe organic phases, dried over magnesium sulphate
6. 6
   Filtrationfiltered
7. 7
   Einengenare concentrated under reduced pressure

Vorschrift

A solution of 0.61 g (4 mmol) of 2-hydroxy-5-methoxybenzaldehyde and 0.112 g (1 mmol) of 1,4-diazabicyclo[2.2.2]octane in 18 ml of acrylonitrile is heated at reflux for 24 hours under argon. After cooling, the medium is diluted with chloroform and then washed with a saturated solution of sodium hydrogen carbonate. The organic phase is then acidified with a hydrochloric acid solution (1N); the aqueous phase is then extracted with chloroform. The organic phases, dried over magnesium sulphate and then filtered, are concentrated under reduced pressure. The title nitrile is obtained pure in the form of a yellow solid after passage over a silica column (eluant:AcOEt/PE:25/75).

Quelle