Diisopropylethylamine → 4-Amino-1-(5-methanesulfonyl-2-pyridyl)-4-methylpiperidine

Participants

Reaction Steps

A solution of (4-methyl-piperidin-4-yl)-carbamic acid benzyl ester hydrochloride salt (0.37 g, 1.3 mmol, Example 30B), 2-bromo-5-(methylsulfonyl)pyridine (0.27 g, 1.15 mmol) and diisopropylethylamine (0.7 mL) in dioxane (4 mL) in a sealed tube was heated to 80° C. for 16 hours. The mixture was cooled, concentrated under reduced pressure and purified by chromatography (silica gel, eluting with 5% hexane/ethyl acetate to 25% ethyl acetate/hexane) to provide the titled compound (0.225 g) as a white solid. MS (CI) m/z 404 (M+1)+; 1H NMR (300 MHz, CDCl3) δ ppm 8.63 (d, 1H), 7.86 (dd, 1H), 7.37 (m, 5H), 6.65 (d, 1H), 5.07 (s, 2H), 4.67 (s, 1H), 4.04-3.96 (m, 2H), 3.49-3.39 (m, 2H), 3.03 (s, 3H), 2.19-2.12 (m, 2H), 1.71-1.61 (m, 2H), 1.41 (s, 3H).

Provenance & Evidence