反应详情

The mixture of 4-(chloromethyl)-2-(4-chlorophenyl)-5-methyloxazole (1.21 g, 5 mmole, commercially from Fluorochem) and ethyl piperidine-4-carboxylate (0.81 mL, 1.05 equiv.), K2CO3 (1.03 g, 1.5 equiv) in dioxane was stirred at 70° C. for 2 h. The reaction solution was cooled to room temperature and the solid was filtered off, rinsed with dichloromethane. The filtrate was concentrated and the residue was recrystallized from hexane to furnish Ethyl 1-((2-(4-chlorophenyl)-5-methyloxazol-4-yl)methyl)piperidine-4-carboxylate (1.65 g, 91%).

1. filtrationthe solid was filtered off
2. washrinsed with dichloromethane
3. concentrationThe filtrate was concentrated
4. customthe residue was recrystallized from hexane