Reaktion #343325

Reaktionsgleichung

stilbene-4-aldehyde

malonic acid

pyridine

piperidine

→

p-styryl cinnamic acid

Ausbeute 97.4%

Lösungsmittel

water

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethus-obtained
2. 2
   SonstigeAfter the completion of the reaction
3. 3
   Sonstigethe precipitate thus-obtained
4. 4
   Sonstigewas collected
5. 5
   Sonstigerecrystallized from acetic acid

Vorschrift

A mixture of 9.4 g of stilbene-4-aldehyde thus-obtained, 10.6 g of malonic acid, 30 ml of pyridine and 3 ml of piperidine was reacted on a steam bath at 100° C. for 4 hours. After the completion of the reaction, the mixture was poured into an exess amount of water and the precipitate thus-obtained was collected and recrystallized from acetic acid to obtain 11.0 g of p-styryl cinnamic acid.

Quelle