Overall, the validated hit reactions from the two reaction arrays displayed four distinct patterns of reactivity. The quinoline S10 and the imidazolopyrimidine S9 had reacted via an unprecedented cycloadditionoxidation sequence to yield the product 1; remarkably the dearomatisation of the quinoline S10 (that had been observed in the initial array) was also found to be viable with the isoquinoline S8 (observed in the second array to give the bridged product 6). The alkene S21 had dimerised via a [2+2] cycloaddition to give the cyclobutane 4 as a 65:35 mixture of diastereoisomers; although photocatalysed [2+2] cycloadditions are known, they are restricted to electron-rich alkene substrates. In contrast, the products 2, 5 and 7 were all formed by the addition of a nitrogen nucleophile to the alkene S18. Finally, TRIP-thiol and the alkene S18 had reacted by an additionoxidation sequence to give the -hydroxy sulfide 3. Table 1: Products of validated reactions hits.