反应详情

To a boiling solution of 3.0 g. (0.014 m.) of 3,5-diacetyl-4,6-dihydroxy-2H-pyran-2-one in 25 ml. of benzene is added 1.4 g. (0.015 m.) of aniline and the resulting mixture is refluxed overnight. The reaction mixture is cooled and filtered to give 5-acetyl-4-hydroxy-3-[1-(phenylamino)ethylidene]-2H-pyran-2,6(3H)-dione, m.p. 184° -186° C.

1. temperatureThe reaction mixture is cooled
2. filtrationfiltered