反应详情

The aniline thus prepared (0.8 g., 0.0045 mol) is added to a hot suspension of 3,5-diacetyl-4,6-dihydroxy-2H-pyran-2-one in 50 ml. of methanol. The mixture is refluxed for one hour and filtered to obtain 3-[1-(3-acetamido-4-methoxyphenylamino)ethylidene]-5-acetyl-4-hydroxy-2H-pyran-2,6(3H)-dione, m.p. 252°-253° C. (dec.).

1. temperatureThe mixture is refluxed for one hour
2. filtrationfiltered