反应详情

3,5-Dimethyl-1-(4-nitro-phenyl)-piperazine (1.40 g, 5.90 mmol) is dissolved in 20 ml of methanol with ˜1 g of Raney nickel suspension. Hydrazine (0.576 g, 14.9 mmol) is dissolved in 20 ml of methanol and added dropwise to the reaction mixture over 20 minutes. Mixture is stirred at room temperature for 3 hours. Mixture is filtered through celite and reduced on rotovap to afford the product as a black solid (1.05 g, 67%); 1H NMR (DMSO-d6) δ 0.94 (d, J=6.3 Hz, 6H), 1.93-2.00 (m, 2H), 2.65-2.85 (m, 3H), 3.13-3.20 (m, 2H), 4.45 (bs, 2H), 6.43 (d, J=8.5 Hz, 2H), 6.61 (d, J=8.5 Hz, 2H).

1. additionadded dropwise to the reaction mixture over 20 minutes
2. filtrationMixture is filtered through celite