Di-tert-butyl dicarbonate → tert-Butyl 3-[(2E)-2-buten-1-yloxy]-4-oxopiperidine-1-carboxylate

Participants

Reaction Steps

The same operation as in Example (90b) was performed using tert-butyl 3-[(2E)-2-buten-1-yloxy]-4,4-dimethoxypiperidine-1-carboxylate obtained in Example (119a) (5.05 g, 16.0 mmol), a water/TFA mixed solution (1/1, 20 mL) and di-tert-butyl dicarbonate (5.2 g, 23.8 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 4.31 g of the title compound as a light brown oily substance (100%).

Provenance & Evidence