Fig. 1: Asymmetric hydrogenation of 1,3-diketones.

a Previous work: desymmetric enantioselective reduction of monocyclic 1,3-diketones via asymmetric hydrogenation (AH). b Challenging kinetic resolution of spirocyclic 1,3-diketones via AH. c This work: kinetic resolution of spirocyclic 1,3-diketones and heterocyclic spiranes via AH. d Representative spirocyclic natural products. e Selected chiral ligands and materials containing the spirocyclic structural motif.