Studies on cycloaddition of cyclohexa-2,4-dienones and transformation of adducts: a general, stereoselective route to multifunctional bicyclo[2.2.2]octanes and diquinanes.

[摘要]：The cycloaddn. of in-situ generated cyclohexa-2,4-dienones with vinyl ethers, vinyl acetate, and Ph vinyl sulfone leading to variously functionalized bicyclo[2.2.2]octanes was examd. Functional group manipulation in the resulting adducts gave bicyclo[2.2.2]octanes endowed with a b,g-enone chromophore. Triplet-sensitized irradn. of bicyclooctenones followed by reductive cleavage provided a stereoselective route to diquinane frameworks having diverse functionalities.

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