A Facile Synthesis of <b><i>trans</i></b>-Fused Pyrano[3,2-<i>c</i>]benzopyrans Catalyzed by Scandium Triflate - Concepedia

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A Facile Synthesis of <b><i>trans</i></b>-Fused Pyrano[3,2-<i>c</i>]benzopyrans Catalyzed by Scandium Triflate

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2002

Year

J. S. Yadav, Basi Reddy, M Aruna, Martial Thomas

Corresponding Trans-fused PyranobenzopyransCross-coupling ReactionEngineeringHeterocyclicEfficient Lewis AcidScandium TriflateOrganic ChemistryOrganometallic CatalysisCatalysisChemistryHeterocycle ChemistrySynthetic ChemistryBiomolecular Engineering

Abstract

Scandium triflate has been utilized as an efficient Lewis acid for the intramolecular cycloaddition of o-quinonemethides (generated in situ from salicylaldehydes and unsaturated alcohols) to afford the corresponding trans-fused pyranobenzopyrans in high yields with high selectivity.