A new regioselective synthesis of 2, 3, 4, 5??tetrahydro??6H??oxepino [3, 2??c] pyran??6??ones, and [1] benzopyran??6??ones

P Bravo, M Frigerio, C Ticozzi

Index: Bravo; Frigerio; Ticozzi Journal of Heterocyclic Chemistry, 1988 , vol. 25, # 2 p. 647 - 649

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Abstract

Abstract Through an anti-Markovnikow hydration of some olefin derivatives of 4-hydroxy-2- pyrones, and 4-hydroxy-coumarins, followed by a regioselective intramolecular dehydration, involving the primary alcohols obtained and the enolic oxygen of the rings, promoted by

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