反应详情

The same operation as in Example (90a) was performed using tert-butyl 3-hydroxy-4,4-dimethoxypiperidine-1-carboxylate (6.2 g, 23.7 mmol), sodium hydride (55% content, 1.57 g, 36 mmol), 2-fluoroethyl p-toluenesulfonate (7.85 g, 46 mmol) and DMF (50 mL). The residue was purified by column chromatography (elution solvent: hexane/ethyl acetate=10/1, 4/1, 2/1) to obtain 7.12 g of the title compound as a colorless oily substance (98%).

1. customThe residue was purified by column chromatography (elution solvent: hexane/ethyl acetate=10/1, 4/1, 2/1)