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Report | Regular issue | Vol 16, No. 8, 1981, pp.1353-1355
Published online, 1st January, 1970
DOI: 10.3987/R-1981-08-1353
The Reaction of 3-Hydroxycoumarin with Benzalacetone

V. K. Ahluwalia,* Keya Mukherjee, and Nimmi Rani

*Department of Chemistry, University of Delhi, Delhi-110 007, India

Abstract

The reaction of 3-hydroxycoumarin (I) with benzalacetone in presence of dioxane-piperidine afforded 3-hydroxy-4-(α-phenyl-β-acetylethyl )coumarin (IIa) which on acetylation with Ac2O/pyridine gave a cyclised product, 2-acetoxy-2-methyl-4-phenyl-10-oxo-3,4-dihydropyrano[2,3-c][1]benzopyran (III).