Reaktion #93993

Reaktionsgleichung

2-Carboxymethyl-3-phenylpropenoic acid

acetic anhydride

→

3-methoxycarbonyl-2-benzylidenepropanoic acid

Reaktionsbedingungen

Aufarbeitung

1. 1
   EinengenThe mixture is concentrated to dryness
2. 2
   Sonstigethe residue triturated with ether, yield 3.6 g
3. 3
   workup.DISSOLUTIONThis anhydride is dissolved in 7 ml
4. 4
   Temperaturof methanol and heated in the steam bath for 1 hour

Vorschrift

2-Carboxymethyl-3-phenylpropenoic acid (4.1 g.) and acetic anhydride (9 ml.) are heated in the steam bath for 70 minutes. The mixture is concentrated to dryness and the residue triturated with ether, yield 3.6 g. This anhydride is dissolved in 7 ml. of methanol and heated in the steam bath for 1 hour.

Quelle