Ethyl benzoylacetate → 3-Benzoyl-5,7-dimethoxy-2H-1-benzopyran-2-one

Beteiligte Stoffe

Reaktionsschritte

A mixture of 18.2 g 4,6-dimethoxysalicylaldehyde, 20.0 g ethyl benzoylacetate, 20 ml acetonitrile and 30 drops piperidine was heated gently on a hot plate for 45 minutes. After cooling the product was collected and recrystallized twice from acetonitrile and once from benzene containing a small amount of acetonitrile. m.p. 178° C.-179° C.

Herkunft & Nachweise