反应详情

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.

1. concentrationThe mixture is concentrated to dryness
2. customthe residue triturated with ether, yield 3.6 g
3. dissolutionThis anhydride is dissolved in 7 ml
4. temperatureof methanol and heated in the steam bath for 1 hour