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Communication | Regular issue | Vol 22, No. 1, 1984, pp.1-6
Published online, 1st January, 1970
DOI: 10.3987/R-1984-01-0001
Synthesis of Heterocyclic Compounds XXXVI. Preparation of Alkyl Substituted Pyrancarbonitriles

José L. Soto,* Carlos Seoane, Nazario Martín, and Margarita Quinteiro

*Departamento de Química Orgánica, Facultad de Química, Universidad Complutense de Madridas, Ciudad Universitaria, E-28040 Madrid, Spain

Abstract

The cyclizatian of the ketonitriles obtained from the reaction of suitably substituted propenones with propanedinitrile leads to alkyl substituted 4H-pyrans. Some of the starting propenones had to be prepared by base promoted opening of an isoxaxole ring in the presence of an aldehyde. An exception to the general synthesis is also reported.