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Extension of regioselectivity study to diazines: the same general principles apply, although the innate preference of the parent heterocycle is harder to overcome. (For key to highlighting circles, see Figures 6 and 7.) Reagents and conditions: heterocycle (0.125 mmol), IPS (2 eq.), TBHP (3 eq.), DMSO, 50 °C, 12–16 h. See Supporting Information for more details.
