Performing the reaction on a 5 mmol scale gave 1a in 81% yield (Scheme 2). With the electron-poor bromo-substituted substrate 3b, we observed a significant drop in yield (entry 8), possibly due to a diminished stability of the I(III) intermediate. To circumvent this issue, addition of two equivalents of the oxidant after an initial oxidation period was necessary to increase the yield of 1b to 74% (entry 9). These slightly modified conditions were then consequently applied for all electron poor substrates. The strong electron-poor 4-NO2 derivate 1c was isolated in a moderate yield of 57%.