Reaktion #54246

Reaktionsgleichung

hydrochloric acid

3-chlorobenzaldehyde

malonic acid

pyridine

→

3-chlorocinnamic acid

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe starting material is prepared
2. 2
   Temperaturis heated on the steam bath for 3 hours
3. 3
   Filtrationfiltered
4. 4
   Sonstigethe residue recrystallized from aqueous ethanol

Vorschrift

The starting material is prepared as follows: The mixture of 50 g of 3-chlorobenzaldehyde, 41 g of malonic acid and 36 ml of pyridine is heated on the steam bath for 3 hours. The residue is dissolved in 200 ml of water, the solution acidified with hydrochloric acid, filtered, and the residue recrystallized from aqueous ethanol, to yield the 3-chlorocinnamic acid melting at 150°-152°.

Quelle