Fig. 4: Substrate scope for the para-C-H amination.
From: Metal-free para-selective C-H amination and azidation of N-arylhydroxylamines
Method. A: 1a (0.20 mmol, 1.0 equiv.), 2 (0.40 mmol, 2.0 equiv.), Na2CO3 (0.40 mmol, 2.0 equiv.), FSIT (0.30 mmol, 1.5 equiv.) in 4 ml of MeCN/1,4-Dioxane (3/1) at −20 oC for 3 h. For 45: 2.0 equivalents of K2CO3 rather than Na2CO3 was employed as base. Yields were determined by the isolated products. FSIT fluorosulfuryl imidazolium triflate.
