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Abstract
From 2-allyl-3-chlorotetrahydropyran, (E)-4,7-octadien-1-ol and (E)-4,7-octadienal were obtained. The aldehyde was conjugated with ethyl acrylate to give a γ-keto ester from which 5-(3E,6-heptadienyl)dihydro-2(3H)-furanone was prepared. 4-Oxo-and 4-hydroxy-derivatives of decanoic and undecanoic acids are discussed.