4-Acetamidobenzaldehyde → HCID 76168093, compound

Participants

Reaction Steps

To a mixture of 2.11 g. (0.01 m.) of 3,5-diacetyl-4,6-dihydroxy-2H-pyran-2-one and 1.63 g. (0.01 m.) of p-acetamidobenzaldehyde in 200 ml. of chloroform is added with stirring 25 drops of piperidine. The resulting solution is refluxed and azeotroped for 12 hours, filtered hot and the solid is washed with dilute hydrochloric acid, water and ether to give 3-(p-acetamidocinnamoyl)-5-acetyl-4-hydroxy-2H-pyran-2,6(3H)-dione, m.p. 230°-231° C.

Provenance & Evidence