Table 2. C(sp³)–H carbamation of cyclohexane with various isocyanates ^{a , b} .

^aReaction conditions: 1a (5.00 mmol), 2 (0.500 mmol), 3 (1.25 mmol), [Cu(NCMe)₄]BF₄ (0.0250 mmol), neocuproine (0.0250 mmol), trifluorotoluene (0.5 mL), 100 °C, 24 h.

^bYields in parentheses were obtained in cyclohexane (1.6 mL, 15.0 mmol).