The scarcity of BN-isosteres of the higher helicenes is presumably due to the synthetic challenge of incorporating BN units into these strained PAHs. Methods to form BN-PAHs predominantly build on Dewar's seminal work in which -N(R)H substituted PAHs are functionalised via electrophilic C-H borylation using haloboranes, often in the presence of an additional Lewis acid (e.g. AlCl3 ) and/or a base. Notable work extending Dewar's approach to access BN-containing higher helicenes comes from Hatakeyama and co-workers who reported benzo-fused aza (and oxa) bora-helicenes, e.g. E, and multihelicenes. However, the synthesis of the BN helicenes reported to date requires forcing conditions, for example, A is formed by heating the amine precursor with excess BBr3 at 220°C. Furthermore, these reactions proceed via ill-defined boron electrophiles, and the optimal borylation conditions are often highly substrate / Lewis acid and base dependent. Thus generating an N-directed electrophilic C-H borylation method that proceeds under milder conditions for a range of challenging substrates would facilitate access to novel BN materials.