To explore if C=C bonds could also be activated, we treated a THF solution of 4 with styrene, (Scheme 6, bottom-left). Gratifyingly, full conversion of 4 was observed to yield blue 7. Extensive 1D and 2D NMR analysis (THF-d 8 , see ESI Section 1.9) showed that 7 is formed as a single diastereomer with the phenyl group pointing towards the naphthyridine motif as depicted in Scheme 6. The diastereomer with the phenyl group pointing towards the N-dipp motif was not observed, an observation we attribute to steric clashing.