反应详情

Monoimine (1, 280 mg, 1 mmol) and 4-methoxyaniline (123 mg, 1 mmol) were dissolved in 20 ml of toluene. To this solution 4 Å molecular sieves were added. After standing for 6 days at room temperature the reaction mixture was filtered and the solvent was removed in vacuo. The residue was recrystallised from ethanol. Yield 148 mg (38%) of mixed diimine (6). 1H-NMR (CDCl3) δ 8.42 (dd, 1H), 8.34 (dd, 1H), 7.86 (t, 1H), 6.93 (d, 2H), 6.88 (s, 2H), 6.81 (d, 2H), 3.82 (s, 3H), 2.43 (s, 3H), 2.29 (s, 3H), 2.22 (s, 3H), 2.00 (s, 6H).

1. additionTo this solution 4 Å molecular sieves were added
2. filtrationthe reaction mixture was filtered
3. customthe solvent was removed in vacuo
4. customThe residue was recrystallised from ethanol