Synthesis and transformation of some derivatives of 3-acetylcoum

Abstract

By the reaction of o-acylphenols with ethyl acetoacetate a new series of 3-acetylcolimarine derivatives were obtained. Some α, β-unsaturated ketones were also synthesized via 3-acetylcoumarine derivatives by Claisen-Schmidt condensed reaction. Ketones formed via 3-acetyl-a-methylcoumarine derivatives have interesting structures. The structures of these compounds were confirmed by IR, ¹H-NMR and MS spectroscopic data.