Fig. 1: Rh-catalyzed asymmetric hydroformylation of different alkenes.

a The state-of-the-art (asymmetric hydroformylation) AHF of alkenes; b Previous work: AHF of cyclopropyl-functionalized trisubstituted alkenes; c This work: AHF of trisubstituted cyclopropenes affording chiral quaternary cyclopropanes.