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An efficient synthesis of diversely functionalized furans is developed via Cu-mediated intermolecular annulative couplings of acetylenic sulfones and activated methylenes, which provides a straightforward and atom-economic way to tetrasubstituted furan derivatives in good yields.
An atom-economic protocol to the regio- and stereoselective formation of tetrasubstituted alkenyl ketones/sulfones is realized via the Pd-catalyzed haloallylation of alkynyl ketones/sulfones, which provides an efficient and straightforward pathway to synthesis highly functionalized alkenes.
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