Studies on Synthesis of Coumarin Derivatives. XVIII. Condensation of Ethyl (2-Methyloxazolo) coumarin-3-carboxylates with Aldehyde Groups

Abstract

The condensations of (2-methyloxazolo) coumarin derivatives (I. II. and III) with 5-nitro-2-furaldehyde were proceeded by heating with fused zinc chloride. In this case, I was more readily condensed than II and III with aldehyde groups to give the corresponding condensation products.