The version of this Article originally published online did not include a caution statement relating to safety concerns over some of the reagents used. All versions of the Article now have the following text included at the start of the Methods section "Caution: Sodium azide (NaN3) is highly toxic and also a potential explosion hazard; it can also react with organohalides to form explosive organic azides. Under acidic conditions, sodium azide can form hydrazoic acid (HN3) which is highly toxic. Considering these hazards, appropriate safety precautions should be taken when undertaking the C-C amination reactions reported in this Article." Furthermore, in Fig. 2a, in the reaction conditions on the first equation it should have read DDQ not DDG; this has also been amended.