Issue 7, 1988

Formation of oxygen-bridged heterocycles in the hantzsch synthesis with 4-(2-hydroxyphenyl)but-3-en-2-one

Abstract

Condensations of 4-(2-hydroxyphenyl)but-3-2-one with methyl acetoacetate, pentane-2,4-dione, dimedone, and methyl cyanoacetate under the conditions of the Hantzsch synthesis lead to 9-methyl-8-oxa-10-azatricyclo[7.3.1.02,7]trideca-2,4,6,11-tetraene derivatives and related heterocycles. An analogous condensation with 2-aminopropene-1,1,3-triscarbonitrile yields stereoselectively 11-dicyanomethylene-9-methyl-8-oxa-10-azatricyclo[7.3.1.02,7]trideca-2,4,6-triene-12α-carbonitrile. Under suitable reaction conditions, the condensation of 4-(2-hydroxyphenyl)but-3-en-2-one with cyanamide affords various products with the 9-methyl-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2,4,6,11-tetraene skeleton. Condensation products of salicylaldehyde with acetone, 2-aminopropene-1,1,3-triscarbonitrile, and 3-aminocrotononitrile have been identified.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 1, 1988, 2053-2058

Formation of oxygen-bridged heterocycles in the hantzsch synthesis with 4-(2-hydroxyphenyl)but-3-en-2-one

J. Světlík, F. Tureček and V. Hanuš, J. Chem. Soc., Perkin Trans. 1, 1988, 2053 DOI: 10.1039/P19880002053

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