Phosphate esters attached to 2,2´-dihydroxy-1,1´-binaphthyl (BINOL) backbones have been extensively used for their capacity to engage in hydrogen bonding and Brønsted acid/base catalysis, leveraging the reactivity of their carbonyl-and hydroxy groups. The research conducted by the Kanai group has demonstrated that thiol-derivatives of BINOL possess the ability to abstract hydrogen atoms following single-electron oxidation to form a sulphur-centred radical, facilitated by an organic photocatalyst. To confirm our mechanistic hypothesis involving cerium binding to phosphate derivatives, we employed To eliminate the possibility of a ground-state reactivity of the BINOL phosphate, control reactions were conducted. Table . Control experiments and reaction optimisation for the HAT transformations using 1,1´-binaphthyl-2,2´-diyl hydrogen phosphate (7).