Our first attempt to introduce boron atom using BBr 3 as boron source with i Pr 2 NEt in o-dichlorobenzene (o-DCB) at 180 o C was successful to produce phenyl group functionalized BN-PAHs NBNN-1 when phenylmagnesium bromide was used as Scheme 2 Synthetic routes for NBNN-1 to NBNN-5 ). Thermal ellipsoids are set at 50% probability. Hydrogen atoms omitted for clarity.