反应详情

The same operation as in Example (90b) was performed using tert-butyl 3-(3-fluoropropoxy)-4,4-dimethoxypiperidine-1-carboxylate obtained in Example (127a) (2.27 g, 21.2 mmol), a water/TFA mixed solution (3/1, 12 mL) and di-tert-butyl dicarbonate (2.18 g, 10 mol). The resulting residue was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=10/1, 5/1, 2/1, 1/1) to obtain 1.71 of the title compound as a colorless oily substance (88%).

1. customThe resulting residue was purified by silica gel column chromatography (elution solvent: hexane/ethyl acetate=10/1, 5/1, 2/1, 1/1)