Scheme 2. Co-nanoparticles catalyzed N-alkylation of aniline with different alcoholsa. a Reaction conditions: 0.5 mmol aniline, 1 mmol alcohol, 15 mg catalyst (0.86 mol% Co), 0.5 mmol t-BuOK (1 equiv.), 2 mL toluene, 140 °C, isolated yields. b same as ‘‘a’’ with 30 mg catalyst (1.7 mol% Co). c same as [a] with 50 mg catalyst (2.8 mol% Co) at 160 °C, d same as ‘‘c’’ at 150 °C. e GC yields.
