反应详情

To a solution of tert-butyl (3-amino-2,6-dichloropyridin-4-yl)carbamate (353 g, 1.27 mol) and trans-4-methylcyclohexanecarbaldehyde (160 g, 1.27 mol) in DCM (8.0 L) and acetic acid (2 ml) was added sodium triacetoxyborohydride (807.7 g, 3.81 mol) at 0° C. The mixture was stirred for 15 min, and then warmed to room temperature. The mixture was stirred for 15 h at room temperature and then quenched with water (10 L). The mixture was filtered, the filtrate was separated, and the organic layer was concentrated under reduced pressure to give crude product. The crude product was purified over a silica gel column, eluting with EtOAc: petroleum ether (0-1:10), to give tert-butyl (2,6-dichloro-3-(((trans-4-methylcyclohexyl)methyl)amino)pyridin-4-yl)carbamate.

1. stirringThe mixture was stirred for 15 h at room temperature
2. customquenched with water (10 L)
3. filtrationThe mixture was filtered
4. customthe filtrate was separated
5. concentrationthe organic layer was concentrated under reduced pressure
6. customto give crude product
7. customThe crude product was purified over a silica gel column
8. washeluting with EtOAc: petroleum ether (0-1:10)