Potassium Carbonate → HCID 59255051, compound

Participants

Reaction Steps

A mixture of tert-butyl 4-({[(5-chloro-1-isopropyl-6-methyl-2-oxo-1,2-dihydropyridin-3-yl)carbonyl]amino}methyl)piperidine-1-carboxylate as prepared in 6(1) (4.77 g, 11.2 mmol) in 10% hydrochloric acid methanol solution (30 mL) was stirred at room temperature for 18 h. The mixture was concentrated in vacuo. The residue was dissolved in methanol (15 mL) and tetrahydrofuran (15 mL). To the resulting solution was added potassium carbonate (3.0 g, 21.7 mmol) at room temperature, and the mixture was stirred at room temperature for 18 h. Then, the mixture was filtered through a pad of Celite, washed with methanol/tetrahydrofuran (v/v=1/1, 200 mL). The filtrate was concentrated in vacuo. The residue was chromatographed on a column of silica gel eluting with dichloromethane/methanol/25% ammonium hydroxide (v/v/v=10/1/0.2) to give 3.43 g (94%) of the title compound as a white solid.

Provenance & Evidence