Figure 3.

Application to a vast variety of N-heterocycles (isolated yields after in situ oxidation and addition step determined by ¹H NMR in brackets). General conditions: reaction of 1 equiv of substrate with 2 equiv of SKA in MeCN using 1 mol % of ^PhPADI at 25 °C followed by DDQ (see SI for all the details). ^aReaction at 0 °C. ^bReaction at −20 °C. ^cUse of ^CF3PADI. ^dNeat conditions. ^eAddition before oxidation after 7 days. ^fOxidation with PIFA. ^gReaction in DCM. ^hOxidation with DIAD. ⁱOxidation with KMnO₄. ^jOxidation with Pd/C 10 mol %.