From this intermediate, a Suzuki coupling with a brominated analog 4 of 4CzIPN was envisioned to allow for the desired union of the photocatalyst with the BINOL backbone of what will become the phosphoric acid. Inspired by earlier reports from our group about photosubstitution reactions of the nitrile group at 4CzIPN and 2CzPN, we considered leveraging this photoredox radical coupling for the synthesis of the necessary brominated 4CzIPN derivative 4. To our delight, the previously unreported reaction of 4CzIPN (3) with 4-bromophenylacetic acid gave the desired product 4 without any detrimental effects due to the presence of the potentially reactive aryl bromide (Scheme 3B, second step). This functionalization reaction proceeded in good yield when performed on a small scale (60 µmol) using irradiation from below via a 451 nm LED plate through the bottom of 5 mL crimp cap vials; however, scaling up the reaction to a synthetically useful 2.4 mmol using a Kessil lamp (λmax = 440 nm), yielded just 42% of the desired substrate after 1 h reaction time, in contrast to the 70% observed on the 60 µmol scale under otherwise identical conditions. By doubling the concentration and increasing the time to 5 h, a 72% isolated yield was achieved on a 2.4 mmol scale (Scheme 3B).