Abstract
Enantioenriched chromanone lactones were prepared by copper-catalyzed asymmetric vinylogous addition of siloxyfurans to 2-ester-substituted chromones, as reported by Jin Cui, Masakatsu Shibasaki, and co-workers in their Communication (e202203128). The catalytic system features the use of chiral ligands to control the diastereo- and enantioselective addition of copper vinylogous enolates to chromones. The cover illustrates superimposed product structures, dropping a hint about the ligand-controlled diastereodivergence.
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