反应详情

A solution of 5-nitro-2-chloropyridine (2.50 g) and trans-1,4-cyclohexanediamine (5.40 g) in ethanol (15 ml)-tetrahydrofuran (10 ml) was stirred at room temperature for 5 days. The precipitates were removed by filtration and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (solvent: chloroform-methanol-concentrated aqueous ammonia (20:4:1)) and crystallized from ethyl acetate to obtain N-(5-nitro-2-pyridyl)-trans-1,4-cyclohexanediamine (Reference Example 3-1 in Table 5).

1. customThe precipitates were removed by filtration
2. concentrationthe filtrate was concentrated under reduced pressure
3. customThe residue was purified by silica gel column chromatography (solvent: chloroform-methanol-concentrated aqueous ammonia (20:4:1))
4. customcrystallized from ethyl acetate