Although long known, 1,2- and 1,3-dicarbonyl compounds have recently come more and more to prevalence as ideal substrates for the invention of new stereoselective multiple bond-forming transformations (MBFTs). Herein, a critical appraisal is presented of some of the most spectacular of these MBFTs, which allow the formation from three up to six bonds in highly step- and atom-economical processes.
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