Abstract

Abstract 1,6-Dioxadispiro[2.0.4.4]dodecan-7-one, a useful intermediate of dispiro-α-methylene-γ-butyrolactones, was synthesized in a good overall yield by the cycloaddition of dichloroketene to 1,2-dimethylenecyclohexane, and the zinc dust reduction of the chlorine atoms, followed by the Baeyer-Villiger oxidation with m-chloroperbenzoic acid.

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