Pyridine → HCID 70192656, compound

Participants

Reaction Steps

Methanesulfonyl chloride (0.77 mL, 1.13 g, 9.9 mmol) was added dropwise to a stirred, cooled (0° C.) solution of N-phenyl-1-t-butoxycarbonylpiperidine-4-methylamine (2.61 g, 9 mmol) and pyridine (1.09 mL, 1.07 g, 13.5 mmol) in dichloromethane (50 mL) and the mixture was stirred at room temperature for 16 h. The mixture was cooled in ice and 4-dimethylaminopyridine (220 mg, 1.8 mmol), pyridine (1.09 mL, 1.07 g, 13.5 mmol) and methanesulfonyl chloride (0.77 mL, 1.13 g, 9.9 mmol) were added. The mixture was stirred at room temperature for 24 h. The solvent was evaporated under reduced pressure, aqueous sodium hydrogen carbonate (saturated, 50 mL) was added and the mixture was extracted with ethyl acetate (3×50 mL). The combined organic fractions were washed with aqueous citric acid (10%, 2×50 mL), aqueous sodium hydrogen carbonate (saturated, 50 mL) and brine (50 mL), dried (MgSO4) and the solvent was evaporated under reduced pressure. The residue was recrystallized from ethyl acetate/hexane (2:1, 30 mL) to give the title compound as a colorless solid (2.96 g, 89%), δH (250 MHz, CDCl3) 7.46-7.31 (5H, m), 4.06 (2H, m), 3.56 (2H, d, J 7.2 Hz), 2.85 (3H, s), 2.60 (2H, m), 1.71 (2H, m), 1.57 (1H, m), 1.43 (9H, s), and 1.05 (2H, m).

Provenance & Evidence