Table 3. Overcoming the limitation of heterocycles in C–H amination a , b .
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aReaction conditions: (1) 4a–4g (0.1 mmol), 2a (0.15 mmol), CuOAc (0.15 mmol), K2HPO4 (0.1 mmol), DMSO (1 mL), 90 °C, 6 h, N2. (2) 2 M HCl (2 mL), rt. 20 min.
bIsolated yield.
cYields of reactions using 0.3 equiv. of CuOAc are shown in parentheses.