反应详情

温度

50 °C

Crude tert-butyl (2,6-dichloro-3-((1-(trans-4-methylcyclohexyl)ethyl)amino)pyridin-4-yl)carbamate (70 g, 0.17 mol) was dissolved in a solution of HCl in dioxane (550 mL, 4 mol/L). The mixture was heated to 50° C. for 12 h. TLC (petroleum ether/ethyl acetate=5:1) showed the reaction was complete. White solid appeared. The solvent was removed under reduced pressure. The residue was washed with methyl tertiary butyl ether to give crude 2,6-dichloro-N3-(1-(trans-4-methylcyclohexyl)ethyl)pyridine-3,4-diamine, which was used for the next step without further purification. 1H NMR (400 MHz, DMSO-d6) δ: 6.63 (s, 1H), 3.16-3.13 (m, 1H), 1.84-1.76 (m, 2H), 1.67 (bs, 2H), 1.39 (bs, 1H), 1.25 (bs, 1H), 1.10-0.96 (m, 5H), 0.89-0.81 (m, 5H).

1. customThe solvent was removed under reduced pressure
2. washThe residue was washed with methyl tertiary butyl ether