Tetrahedron letters

The preparation of (α-alkylidene) tetrahydrofurans by tungsten catalyzed decarboxylation of aldol precursors

T Tanzawa, J Schwartz

Index: Tanzawa, Tomoya; Schwartz, Jeffrey Tetrahedron Letters, 1992 , vol. 33, # 45 p. 6783 - 6786

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Citation Number: 3

Abstract

Abstract A series of substituted (α-alkylidene) tetrahydrofurans was prepared by tungsten catalyzed reaction of substituted hydroxyfuroic acids. These reactions likely involve β- lactone intermediates which decarboxylate under the reaction conditions, and rates for olefin synthesis correlated with donor properties of substituents at C (4).