A series of 1,1',2-trisubstituted olefins also provided bicyclic aziridines 2q-s with excellent ee, despite moderate decreases in yield due to small amounts of competing C-H amination. This approach is attractive for securing quaternary amine-bearing stereocenters, even when the two carbon substituents do not vary greatly in terms of their sterics (e.g. Me vs. Et in 2r).