Initial rates of the oxidative imidoylation of N-methoxy-4-fluorobenzamide under air using different Pd precatalysts. Reaction conditions: [N-methoxy-4-fluorobenzamide] = 101 mM, [tBuNC]tot = 153 mM, [Pd] = 5.0 mM, dioxane (8.0 mL), 65 °C. Specific conditions: (a) 2.5 mM Pd2(dba)3 · CHCl3; (b) 5.0 mM Pd(OAc)2; (c) 5.0 mM Pd(OBz)2; (d) 5.0 mM PdCl2; (e) 5.0 mM Pd(TFA)2; (f) 5.0 mM 1, 7.5 mM dba.