Enantiopure spirocycles that possess a quaternary spirocarbon stereocenter [1] represent an important class of compounds as they can be found in various useful organic molecules, such as natural products,[2] biologically active compounds,[3] and effective chiral ligands for asymmetric catalysis.[4] Construction of such spirocycles using transitionmetal-catalyzed asymmetric carbon–carbon bond-forming reactions are highly desirable in view of the ...
